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Bundit, Jatuporn. "The nutrition and feeding of a native Thai species, the marble goby (Oxyeleotris marmoratus), involving on-farm and experimental studies." Thesis, University of Stirling, 2008. http://hdl.handle.net/1893/256.
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In Thailand, culture and production of a high value freshwater fish, the marble goby, is dependant upon farm-made feeds using marine and freshwater trash fish as primary ingredients. However, there is lack of nutritional research regarding the use of such farm-made feeds and their impacts on the nutritional status, growth and health of marble goby. The aims of the present study were to evaluate the effects of farm- made feeds on slaughter indices, fish lipid classes and fatty acid profiles, nutrient composition and digestibility. In addition it was intended to improve on-farm feed quality for both current practical feeds as used by farmers and alternative feeds using rice bran and tilapia with reference to biochemical composition, growth performance and haematology of marble goby. Nutritional evaluation of farmed fish compared to their wild counterparts indicated that fatty acid composition of farmed marble goby was markedly influenced by diet. Marble goby appeared to utilize MUFA preferentially as an energy source compared to SFA. Fish muscle was characterised by higher n-6 PUFA; arachidonic acid (20:4n-6, AA) and docosapentaenoic acid (22:5n-6, DPA). Eicosapentaenoic acid (20:5n-3, EPA) and docosahexaenoic acid (22: 6n-3, DHA) comprised the majority of n-3 PUFA found in fish muscle and can potentially be enriched into marble goby muscle through the diet. The significantly higher ratios of neutral liver lipid to polar lipid (NL/PL) indicated the imbalance of dietary lipid and energy of on-farm feeds. Moreover, findings on slaughter indices and lipid peroxidation of farmed fish; higher HSI, VSI, liver TBARS and the pale lipid-rich liver of farmed fish indicated problems with the nutritional quality of lipid in farm-made feeds. Experiments aimed to improve farm-made feeds using supplemental vitamin E in the form of α-tocopherol. These demonstrated that supplementation of α-tocopherol to oxidised diets, both mackerel and tilapia based, did not result in a significant beneficial effect in reducing mortality, and improving growth and haematology in marble goby. However, dietary α-tocopherol supplementation helped in reducing fish muscle peroxidation but was not related to muscle α-tocopherol levels. In mackerel based diets containing lipid peroxidation up to 250-300 µmols MDA g-1, α-tocopherol supplementation appeared not to help in reducing liver peroxidation. The alternative use of tilapia as a feed for marble goby resulted in growth and survival rates similar to those of fish fed mackerel based diets. Tilapia contained intrinsic α-tocopherol levels that appeared to be sufficient to reduce marble goby tissue peroxidation. The synergic effects on antioxidant activities between α- tocopherol supplement and natural E vitamer contained in rice bran helped to reduce tissue TBARS and improve haematology in fish fed combination diets of oxidised tilapia and rice bran. The inclusion of rice bran in farm based diets resulted in decreased tissue peroxidation, an adverse affect on dry matter and protein digestibility; and lower fish feed intake, growth and survival rate when 25% of rice bran was added into practical mackerel based diet. Overall, formulated feeds showed promising growth and survival rate in marble goby but more research on dietary nutrients and energy balances are required.
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Joyeux, Jean-Claude. "Biologie des populations de Gobius niger Linne, 1758 Pomatoschistus minutus (Pallas, 1770) et Pomatoschistus microps (Kr0yer, 1838)(Teleostei, Gobidae) dans une lagune Nord-Méditerraneenne, la lagune de Mauguio - France." Perpignan, 1991. http://www.theses.fr/1991PERP0107.
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La biologie des populations de gobius niger, pomatoschitus minutus et pomatoschistus microps a ete aborde dans une lagune nord-mediterraneenne sous divers aspects: structure en age, taille et sexe; croissance; reproduction age et taille de premiere maturite sexuelle, rgs, fecondites, influence des facteurs environnementaux ; condition somatique et rhs; alimentation; deplacements. Ces trois especes presentent entre elles et avec leurs homologues atlantiques des differences a presque tous les niveaux. Les tactiques developpees a chacun de ceux-ci resultent de compromis entre le degre d'euryvalence bioecologique des especes et les conditions abiotiques et biotiques du milieu
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陳嘉儀 and Ka-yi Phoebe Chan. "The ecology of mudskippers (Pisces: Periophthalmidae) at the Mai Po Marshes Nature Reserve, Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1989. http://hub.hku.hk/bib/B31209105.
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Chen, I.-Shiung. "Systematic revision of Rhinogobius (Teleostei-gobiidae) from Southeast Asia." Thesis, University of Bristol, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265498.
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Magalhães, Ana Isabel Ferreira de. "Territorialidade e utilização de espaço em Pomatoschistus pictus (Pisces: Gobiidae)." Master's thesis, Instituto Superior de Psicologia Aplicada, 1998. http://hdl.handle.net/10400.12/625.
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Dissertação de Mestrado em Etologia<br>Observações feitas em aquário permitiram inferir alguns aspectos sobre a territorialidade e utilização do espaço em Pomatoschistus pictus. Nesta espécie os machos constroem ninhos para onde atraem as fêmeas. Após a desova, o macho guarda os ovos até estes eclodirem. As observações revelaram que: 1) o machos parentais têm maior número de ocorrências nas áreas onde têm o ninho; 2) a presença dos ninhos não tem uma influência significativa na distribuição espacial das fêmeas, no entanto, a distribuição dos machos sem ninho é mais equitativa do que a dos machos com ninho; 3) Os machos parentais passam a maior parte do tempo nos ninhos, ocupados com comportamentos parentais; 4) As actividades dos machos parentais decrescem à medida que se afastam do ninho. Os comportamentos agressivos diminuem de intensidade e quantidade à medida que aumenta o afastamento em relação ao ninho; 5) existem diferenças significativas no comportamento das fêmeas, dos machos com ninho e dos machos sem ninho. Estes últimos apresentam algumas semelhanças comportamentais com as fêmeas.
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Yang, Ka-yee Josephine. "The feeding ecology of the mudskipper : Boleophthalmus pectinirostris (Pisces: periophthalmidae) at the Mai Po Marshes nature reserve, Hong Kong /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B1766486X.
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Kay, Benjamin W. "Does predation/disturbance by benthic-feeding gobies influence the infauna on Heron Island reef flat /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18994.pdf.
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Neilson, Matthew. "Evolution, systematics, and phylogeography of Ponto-Caspian gobies (Benthophilinae: Gobiidae: Teleostei)." University of Toledo / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1260565938.
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Faria, Cláudia Barreiros Macedo de. "Distribuição vertical e ocupação diferencial do habitat de Lipophrys pholis (blenniidae), Coryphoblennius galerita (blenniidae), Gobius cobitis (gobiidae) e Gobius paganellus (gobiidae), na plataforma rochosa da costa do Estoril." Master's thesis, Instituto Superior de Psicologia Aplicada, 1995. http://hdl.handle.net/10400.12/500.
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Dissertação de mestrado em Etologia<br>Neste trabalho apresenta-se uma abordagem eto-ecológica das espécies Lipophrys pholis (Blenniidae), Coryphoblennius galerita (Blenniidae), Gobius cobitis (Gobiidae) e Gobius paganellus (Gobiidae) na plataforma rochosa da Costa do Estoril.
Analisaram-se concretamente os problemas referentes à caracterização dos habitais preferenciais de cada espécie, ao estudo da distribuição dos indivíduos de cada espécie segundo a sua dimensão, à caracterização dos locais de nidificação, ao estudo do comportamento de selecção do substrato que cada espécie apresenta em aquário, ao estudo dos padrões de organização social e dos comportamentos agonísticos que afectam a competição intraespecífíca e finalmente ao estudo da importância dos comportamentos agonísticos interespecífícos como mecanismo de separação de habitat entre as espécies.
Verifícou-se que nas populações estudadas, ocorre uma diferenciação nítida do habitat ocupado pelas espécies de cada família estudada, Gobiidae e Blenniidae, quer no que se refere aos locais de nidificação (pedras/abrigos na rocha), quer ao habitat utilizado pelos juvenis e adultos (canais/poças e abrigos na rocha), que poderá resultar de uma série de constrangimentos morfológicos, comportamentais, alimentares e provavelmente fisiológicos, característicos das espécies de cada família.
Constatou-se que em habitais frequentados por mais do que uma espécie, ocorre também uma diferenciação do microhabitat utilizado, quer ao nível dos locais de nidificação, quer ao nível do habitat utilizado pelos juvenis e adultos, o que poderá estar relacionado com a dimensão típica de cada espécie, os diferentes hábitos alimentares e com a capacidade que cada espécie apresenta em tolerar diferentes graus de exposição à turbulência e acção das ondas.
Relativamente às duas espécies de biénios estudadas, constatou-se que C.galerita é uma espécie altamente especializada, tanto ao nível alimentar como ao nível do microhabitat, recrutando para as mesmas poças onde permanece mesmo depois de atingir a maturidade sexual, ao contrário de L.pholis que é uma espécie mais generalista, a ambos os níveis considerados, sofrendo uma distribuição diferencial segundo a dimensão dos indivíduos, coexistindo com C.galerita apenas na fase de imaturo (de 3 a 7cm de dimensão).
Os dados obtidos em aquário, sugeriram que apesar de em grupos monoespecífícos, a ordem de dominância ser determinada pelo tamanho dos indivíduos, em grupos heteroespecífícos, é o factor espécie a assumir essa função (dentro de certos limites de tamanho), sendo C.galerita a espécie dominante, seguida de L.pholis e por último G. cobitis.
Enquanto que G.cobitis apresenta logo à partida uma preferência distinta por substrato de areia, ambas as espécies de biénios (com dimensões entre 3 a 7cm), apresentam preferências semelhantes entre si, por substrato de rocha e abrigos na rocha, o que sugere a existência de competição interespecífica, entre estas duas espécies. Observou-se que L.pholis altera radicalmente as suas preferências, quando em presença de C.galerita, sendo "empurrado" para o substrato de maior exposição (areia), o que poderá sugerir que, na natureza, a competição interespecífica actue ao nível da separação do microhabitat entre estas duas espécies.
Ainda do estudo em aquário, verificou-se que cada espécie apresenta um reportório comportamental específicos e bem adaptado ao tipo de microhabitat em que vive, observando-se uma maior semelhança entre as duas espécies de biénios, ao nível dos comportamentos agonísticos estudados. Foi sugerido que a pressão de selecção que estas duas espécies sofreram, no sentido de diminuírem a agressividade nos encontros agonísticos, foi semelhante entre si, e mais acentuada que no caso de G.cobitis.
Finalmente, verificou-se que em Portugal todas as espécies estudadas se reproduzem mais cedo e durante mais tempo, que em zonas de maior latitude, o que aliado à ocorrência de um crescimento mais rápido, observado em ambas as espécies de biénios, parece permitir que em Portugal estas espécies atinjam a maturidade sexual mais cedo que em países de maior latitude, maximizando assim o seu potencial reprodutor
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Yang, Ka-yee Josephine, and 楊嘉儀. "The feeding ecology of the mudskipper: Boleophthalmus pectinirostris (Pisces: periophthalmidae) at the MaiPo Marshes nature reserve, Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31213820.
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Nomura, Mariene Mitie. "Efeitos dos ciclos de iluminação e de marés na ritmicidade da atividade locomotora de Bathygobius soporator (Valenciennes,1837) (Teleostei: Perciformes: Gobiidae)." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/41/41133/tde-23072008-155105/.
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Muitos trabalhos sobre comportamento consideram que os ritmos observados são simplesmente uma resposta aos estímulos ambientais. No entanto, desde o século XVIII, sabe-se que a temporização é real e muitos organismos exibem ritmos endógenos que são arrastados por zeitgebers ou \"doadores de tempo\". Para a grande maioria dos seres vivos, o principal zeitgeber é o ciclo claro/escuro (CE). No entanto, para os organismos das zonas entremarés, o ciclo das marés é tão importante quanto o ciclo de luz. A maré e seus componentes agindo como zeitgeber têm sido estudados com invertebrados e pouca atenção tem sido dada aos peixes que vivem nas zonas entremarés. Uma das espécies mais comuns destes ambientes é o Bathygobius soporator, conhecido como amborê, e o presente trabalho teve como objetivo verificar a presença de ritmicidade em sua atividade locomotora, avaliando as contribuições endógenas e exógenas dos ciclos de luminosidade, da variação da coluna d\'água e da turbulência da água sobre este ritmo. Para isso, os amborês foram mantidos em aquários individuais onde as condições abióticas puderam ser controladas de acordo com os experimentos em andamento. A atividade locomotora foi registrada com câmeras de segurança e fontes de luz infravermelha acopladas a um vídeo \"time-lapse\" que fez o registro de um quadro a cada trinta segundos. As distâncias percorridas a cada trinta segundos foram categorizadas em quatro classes discretas, e esses valores foram agrupados a cada trinta minutos, compondo 48 pontos a cada 24 horas. A análise das séries temporais foi feita através do programa \"El Temps\" que gerou actogramas e periodogramas de Lomb-Scargle, que permitem identificar ritmos com períodos significativos. Diante dos resultados obtidos, pôde-se concluir que o ciclo CE e de variação na coluna d\'água são zeitgebers, enquanto a turbulência é um agente mascarador para a ritmicidade locomotora dos amborês. Concluiu-se, também, que os relógios biológicos nos amborês não são rígidos e possuem acoplamento extremamente frágil, gerando uma alta plasticidade na expressão dos ritmos endógenos e exógenos, o que está de acordo com o modo de vida dos amborês observados no ambiente natural.<br>Many organisms\' rhythms are considered to be simple reactions to the cyclical changes in the environment. However, the endogenous rhythms entrained by zeitgebers are well known and have been described for many organisms since the 18th century. Although the light/dark cycle (LD) is the main zeitgeber for most living beings, the tidal cycles are as important for the intertidal organisms. It has been studied as a zeitgeber mainly for invertebrates, and little attention has been given to the intertidal fish. Bathygobius soporator, also known as frillfin goby, is one of the most abundant species in the tropical intertidal zone, and this project was designed to verify the rhythmicity in its locomotor activity, and measure how the LD cycle, the cyclical change in water level, and the turbulence cycle affect the endogenous and/or exogenous aspects of this rhythm. The gobies were kept in individual aquariums where all abiotic conditions were controlled according to the requirements of each experiment. The locomotor activity was recorded with security cameras and infrared light bulbs connected to a time-lapse video recorder that taped one frame every thirty seconds. The distance moved by each fish every thirty seconds was categorized into four discrete classes. The values assigned to these classes of movements were added into thirty minutes blocks, thus giving 48 numbers for every 24 hours. The collected data was analyzed by the \"El Temps\" software that provided actograms and Lomb-Scargle periodograms which allowed the detection of rhythms and significant periods. The results led us to conclude that LD cycle and the cyclical change in water level are zeitgebers to locomotor activity of B. soporator, and that the turbulence is a masking agent. We could also affirm that the frillfin gobies\' biological clocks are weak and have a very fragile coupling, giving the fish a malleable expression of their endogenous and exogenous rhythms. This concurs with the natural history of B. soporator.
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Lam, Chiu, and 林釗. "The biology of the rock pool goby Bathygobius hongkongensis (pisces : Gobiidae) in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1987. http://hub.hku.hk/bib/B31208228.
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FARIAS, Wialla Karmen Teixeira de. "Desenvolvimento ontogenético e ecologia das larvas de Microgobius meeki no Complexo Estuarino de Rio Formoso, Pernambuco." Universidade Federal de Pernambuco, 2017. https://repositorio.ufpe.br/handle/123456789/26026.
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FALCÃO, Elisabeth Cabral Silva, também é conhecida em citações bibliográficas por: SILVA-FALCÃO, Elisabeth Cabral<br>Submitted by Pedro Barros (pedro.silvabarros@ufpe.br) on 2018-08-22T22:51:25Z
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Previous issue date: 2017-05-30<br>CNPq<br>O complexo estuarino de Rio Formoso está inserido em duas áreas de proteção ambiental (APA Guadalupe e Costa dos Corais) e forma um mosaico com diferentes ecossistemas costeiros onde vivem diversos organismos, incluindo as larvas de peixes da espécie Microgobius meeki. Recentemente, este gobiídeo foi identificado como um potencial bioindicador das consequências de interferência antrópica em estuários e suas larvas são descritas como abundantes em alguns estuários do Brasil. O presente estudo teve como objetivo descrever os estágios iniciais do desenvolvimento desse peixe e avaliar os fatores abióticos que mais influenciaram as fases iniciais e os habitats utilizados ao longo deste desenvolvimento. As coletas de ictioplâncton foram realizadas bimensalmente (2009-2012), durante a baixa-mar, através de arrastos horizontais subsuperficiais (malha de 500 μm), em marés de quadratura e sizígia, na coluna d’água associada a habitats de manguezal, prado de fanerógamas e recife de arenito. Em cada um dos habitats foram feitas tréplicas aleatórias por período (diurno e noturno) nas duas estações (estiagem e chuvosa). Apesar da lacuna de informações taxonômicas acerca da espécie abordada, os exemplares examinados apresentaram várias características morfológicas comuns ao gênero Microgobius, que permitiram descrever, ineditamente, os estágios larvais iniciais. Foram estudados 168 indivíduos da espécie, sendo 58, 106 e 4 nas fases de pré-flexão, flexão e pós-flexão, respectivamente. No exame comparativo desses estágios, verificou-se uma densa pigmentação ao longo de toda a porção inferior do corpo (acima e abaixo do intestino), que evidencia a bexiga natatória arredondada. Os exemplares de M. meeki estiveram representados nos três ecossistemas costeiros, sendo encontrados mais abundantemente nos estágios iniciais de desenvolvimento (pré-flexão e flexão) no período noturno, na estação chuvosa e no recife. Poucas larvas foram coletadas durante o dia, com exceção do registro de 5 larvas em pré-flexão. As larvas relacionaram-se positivamente apenas com o fator temperatura, não apresentando relação com a salinidade ou pH. As informações obtidas sugerem preferência dos estágios mais iniciais pelo recife, enquanto o estágio de pós- flexão foi encontrado nos habitats mais internos do estuário. A conectividade ecossistêmica da região assegura o desenvolvimento larval no estuário tropical, sendo este resultado um importante indicativo para a preservação de M. meeki.<br>The Rio Formoso´s estuarine complex is present in two areas of environmental protection (EPA Guadalupe and Costa dos Corais) and forms a mosaic with different coastal ecosystems, habitat for a big diversity of organisms, including Microgobius meeki specie. Recently, this gobie was identified as a potential bioindicator of anthropic interference in estuaries, where their larvae are described as abundant in some Brazilian estuaries. This study aimed to describe the early larval development of M. meeki and to evaluate the abiotic factors that most influenced the initial phases and habitats used throughout this development. The ichthyoplankton collections were carried out bi-monthly (2009-2012), during low tide, through subsurface horizontal trawls (mesh of 500 μm), in neap and spring tides, on a water column associated with mangrove habitats, of seagrass e beachrocks. In each habitat, random rejoinders were made in day and night periods and in dry and rainy seasons. In spite of the lack of taxonomic information about the species studied, the specimens examined presented several morphological caracteristics common to the genus Microgobius, which allowed for the description of the initial larval stages.168 individuals of the species were studied, being 58, 106 and 4 individuals in the pre-flexion, flexion and post-flexion phases, respectively. In the comparative examination of these stages, a dense pigmentation was observed throughout the lower portion of the body (above and below the gut), which shows a rounded bladder. The M. meeki specimens were represented in the three habitats, being found more abundantly in the early development stages (pre-flexion and flexion) at night, in the rainy season and at the reef. Few larvae were collected during the day, with the exception of the 5 larvae record in pre-flexion. The larvae were positively related only to the temperature factor, with no relation to salinity or pH. The information obtained suggests the preference of the earliest stages by the reef, while the post-flexion stage was found in the innermost habitats of the estuary. The ecosystem connectivity of the region ensure the larval development in the tropical estuary, being this result an important indicative for the M. meeki preservation.
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Taillebois, Laura. "Endémisme et dispersion chez les Gobiidae Sicydiinae : traits d'histoire de vie et histoire évolutive." Paris, Muséum national d'histoire naturelle, 2012. http://www.theses.fr/2012MNHN0012.
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La sous-famille des Sicydiinae (teleostei : Gobioidei) représente la plus grande part de la biodiversité des communautés de poissons dans les rivières des îles tropicales. On trouve des représentants dans les systèmes insulaires de l'Indo-Pacifique, des Caraïbes et de l'Afrique de l'ouest. Leur cycle de vie est particulièrement bien adapté aux conditions de ces habitats qui sont oligotrophes et soumis à de fortes variations saisonnières hydrologiques et climatiques. Ces espèces se reproduisent en eau douce et, à l'éclosion, les larves sont entrainées par le courant vers la mer où elles vont passer une phase de vie plancto-pélagique. A l'issue de cette phase, elles retournent en rivière pour grandir et se reproduire. La réalisation de la phylogénie complète des Sicydiinae, avec cinq gènes et incluant tous les genres connus, soutient la monophylie de la sous-famille. Elle a permis d'appréhender l'évolution de celle-ci et de replacer les genres les uns par rapports aux autres, avec un focus particulier sur le genre Smilosicyopus. En effet, l'effort d’échantillonnage a permis de collecter l'ensemble des espèces décrites de ce genre et de valider la taxonomie et les distributions des sept espèces connues. Les traits de vie étudiés de certaines de ces espèces, sélectionnées pour leur caractère endémique ou la large répartition, parmis lesquelles : Sicyopus zosterophorum, Smilosicyopus chloe, Smilosicyopus fehlmanni et Akihito vanuatu ont été analysés. La microanalyse chimique du rapport Sr:Ca a tout d'abord permis de confirmer leur amphidromie. Les ratios Ba:Ca et Sr:Ca dans la phase adulte ont révélés quatre types de profils dont les différences pourraient être attribuées à la géomorphologie des rivières et la variabilité de l'environnement traversé par le poisson. Aucun comportement migratoire le long de la rivières n'a été mis en évidence pour ces espèces, ce qui confirme les hypothèses concernant leur sédentarité à l'état adulte dans les parties moyennes et hautes des cours d'eau. Nous montrons aussi que la durée de phase larvaire (DPL) marine est la même pour les espèces étudiées, qu'elles soient endémiques ou à répartition plus large (55 jours en moyenne). La DPL marine ne jouerait donc pas, dans le cas des espèces étudiées, un rôle prépondérant dans la distribution des taxons et dans l'établissement de l'endémisme ; d'autres facteurs sont à prendre en considération. Nous avons analysé les gènes mitochondriaux du COI et du Cytb ainsi que le gène nucléaire de la Rhodopsine chez trois des quatre espèces sélectionnées et échantillonnées dans toute leur aire de répartition. La diversité génétique est élevée pour les trois espèces qui présentent cependant des patrons de connectivité bien différents. Chez Smilosicyopus fehlmanni, largement réparti, la connectivité entre les populations est importante, ce qui indique que pour cette espèce, ni la fragmentation de l'habitat, ni les courants océaniques n'a crée de barrière aux flux de gènes. En revanche, nous avons pu mettre en évidence une très forte structure génétique entre deux zones géographiques, de part et d'autre du détroit de Torres, chez l'espèce à large répartition Pacifique S. Zosterophorum. Cette séparation est datée, grâce aux données moléculaires à environ 300 000 ans. Les variations du niveau marin durant le Pléistocène ont permis l'établissement d'une barrière géographique intermittente entre l'Australie et la Papouasie au cours des 250 000 dernières années. Cette barrière biogéographique est mise en avant pour expliquer la séparation des deux populations de S. Zosterophorum mise en évidence. Nos résultats montrent ainsi que les patrons d'évolution des espèces sont complexes et dépendants de nombreux facteurs<br>The Sicydiinae subfamily (Teleostei : Gobioidei) is the biggest contributor to the diversity of fich communities in tropical insular river systems. These species are found in the Indo-Pacific area, the Caribbean region and West Africa. They spawn in freshwater, their planktotrophic larvae drift downstream to the sea where they begin a planktonic life phase before returning to the rivers to grow and reproduce. The phylogeny of the Sicydiinae, realised with five markers (including a new one) and including all known genera, supported the monophyly of the subfamily. This work allowed us to understand the evolution of the group and to focus on Smilosicyopus genus. Indeed, the sampling effort made through the central Pacific ocean, concerning Smilosicyopus species, allowed us to collect all species from this genus and to confirm, or not, their taxonomy and their distribution range. Thus, species life history traits can be attributed surely to the concerned one. Life history traits of several species, belonging to different genera, among which Sicyopus zosterophorum, Smilosicyopus chloe, Smilosicyopus fehlmanni and Akihito vanuatu were analysed. These species were chosen owing to their differences in their distribution range from endemism to widespread species. Microchemical analysis of the Sr:Ca ratio in the otolith confirmed the amphidromous life cycle of the studied species. The Ba:Ca and Sr:Ca ratios in the adult life phase revealed four types of patterns, and we suggest that the river geomorphology and the variability in the fish environment could be responsible for such different patterns. No inland migratory behaviour was revealed for these species, confirming the hypothesis of their adult sedentarity in middle and higher courses of river. Otolith microstructure of the studied species was also analyzed. Deposition of the daily growth increments on the otoliths of S. Zosterophorum was validated using an alizarin red S time marking technique. We estimatd the pelagic larval duration (PLD) by counting the number of growth increments from the core to the metamorphosis check mark, and it was shorter, for all the studied species, than the one of previous studie on Sicydiinae species. The PLD of the widespread species, S. Zosterophorum was similar to those of the endemic species, S. Chloe and A. Vanuatu (around 55 days). Here we show that in contrast to the most diverse Sicydiinae genus, Sicyopterus, the PLD could not explainendemism and we must take into account other elements to explain the differences observed in the distribution range. Contrasting patterns of genetic structure and probably a distinct biogeographic history could explain such differences. The analysis of the population connectivity over the sampled region revealed these contrasting patterns. The connectivity among Smilosicyopus fehlmanni populations ( a species with a large distribution range) was high, suggesting that for this species, neither the fragmentation of freshwater habitat nor the oceanic currents surrounding the West Pacific ocean created significiant barriers to gene exchanges. But, S. Zosterophorum, another large distribution range species, displayed a deep division into two haplogroups with one retsricted to the northwest Pacific and the other restricted to the southwest Pacific. The estimated time of divergence between the two populations of S. Zosterophorum (i. E 306 kyr) is coherebr with a Pleistocene separation, produced by the Torres strait barrier. Pleistocene event may have shaped the genetic pattern observed in the present days on both side of the Torres Strait. Our results showed that the evolution and dispersion patterns of Sicydiinae are complex and depending of numerous factors
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Ray, William J. "Habitat and site affinity of the round goby, Neogobius melanostomus (Pisces: Gobiidae), in the Great Lakes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0019/MQ52647.pdf.
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Truemper, Holly A. "Food habits and prey size-selection of yellow perch in extreme southern Lake Michigan, with emphasis on the prey : round goby." Virtual Press, 2003. http://liblink.bsu.edu/uhtbin/catkey/1260485.
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Food habits for yellow perch Perca flavescens were compared using current and previous diet studies from southern Lake Michigan index sites. Yellow perch were not gape limited but size-selective in consumption of the newly established round goby Neogobius melanostomus. Ingested fish ranged from 7 to 47% of the yellow perch's total length and 2 to 53% of their gape. Currently, yellow perch diets are dominated in volume by fish/fish products (85%), which is double from previous studies. Utilization of zooplankton and insect prey items in the yellow perch diet has decreased to <1% by volume in 2002, contrasting with previous consumption of 4 to 20% and 5 to 17%, respectively, from previous studies during 1971-1993. Yellow perch are exhibiting opportunistic, generalist feeding strategy that incorporates both exotic and native prey items, allowing the population to use multiple prey items with the changing prey base in Lake Michigan.<br>Department of Biology
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Chan, Ka-yi Phoebe. "The ecology of mudskippers (Pisces: Periophthalmidae) at the Mai Po Marshes Nature Reserve, Hong Kong /." [Hong Kong : University of Hong Kong], 1989. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12667080.
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Mehmood, Daheem. "Enhancing the production of biomethane : A comparison between GoBiGas process and new process of combining anaerobic digestion and biomass gasification." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-32249.
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In recent years, there is a rapid growing interest in the use of biomethane for the transport sector. A new method of combining anaerobic digestion and biomass gasification is proposed.The feasibility study shows that more biomethane can be produced; resulting in an increase in the revenue compared to individual biogas plants. The GoBiGas project,which is initiated by Göteborg Energi, adopted another method based on gasification, water gas shift and methanation to enable biomethane production from forest residue. The aim of the present study is to investigate the economic viability of the new method when compared with the GoBiGas (Gothenburg Biomass Gasification) process. For this study, a model of GoBiGas process was developed in Aspen Plus to perform the technical analysis, in which the overall efficiency and exergy efficiency were calculated at different moisture contents of biomass. For the economic analysis, the annual revenue was also estimated during the study. The results show that the overall efficiency of the new method is higher than the efficiency of the GoBiGas process and there is more production of biomethane from the new process.
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MacInnis, Andrew J. "Aspects of the life history of the round goby, Neogobius melanostomus, Perciformes, gobiidae, in the Detroit River." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0007/MQ30965.pdf.
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Stefanni, Sergio. "A multi disciplinary investigation of intraspecific variation in the European sand goby, Pomatoschistus minutus (Pallas) (Teleostei: Gobiidae)." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326393.
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Maddox, Elizabeth D. "Generic Identification and Patterns of External Pigment in Larval Gobies (Pisces: Gobiidae) from the Belize Barrier Reef." W&M ScholarWorks, 1992. https://scholarworks.wm.edu/etd/1539617646.
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Rodgers, Edmund W. "Sexual plasticity in a marine goby (Lythrypnus dalli) social, endocrine, and genetic influences on functional sex /." unrestricted, 2007. http://etd.gsu.edu/theses/available/etd-12022007-220715/.
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Thesis (Ph. D.)--Georgia State University, 2007.<br>Title from file title page. Mattew S Grober, committee chair; Kim Wallen, Charles Derby, Laura Carruth, Tim Bartness, committee members. Electronic text (107 p. : ill. (some col.)) : digital, PDF file. Description based on contents viewed Jan. 31, 2008. Includes bibliographical references. (p. 94-107)
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Lima, Filho Paulo Augusto de. "Diversifica??o evolutiva de gob?deos no litoral brasileiro: padr?es citogen?ticos e ecomorfol?gicos." Universidade Federal do Rio Grande do Norte, 2011. http://repositorio.ufrn.br:8080/jspui/handle/123456789/14020.
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Previous issue date: 2011-05-05<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>The fishes of the order Perciformes are characterized as an important model for
understanding the genetic structure of marine populations, because besides they
present examples of conservation chromosomal, also they present the karyotype
diversification for some groups. Gobiidae family is the most specious in the marine
environment. Among its representatives, many species are part of a cryptic fauna
little noticed and studied, a wide distribution with behavioral and reproductive
characteristics, that make them conducive to the action of biogeographical barriers.
Morphologically this family presents reduced body structures through simplification
and regressions. Despite their importance in evolutionary inferences, cytogenetics
data are incipient facing their species diversity, especially with western Atlantic
species. In order to estimate the evolutionary diversity in Gobiidae, it were developed
cytogenetic analysis and the standards body, through geometric morphometrics in
five species on the Brazilian coast, Coryphopterus glaucofraenum, Bathygobius
mystacium, B. soporator, Ctenogobius smaragdus e C. Boleosoma. The data show
significant karyotype and morphological diversity among the species. The pericentric
inversions and mergers play an important role in chromosomal evolution of this
family, causing karyotypic structural and numerical differences in all species.
Karyotypic and morphological comparisons among geographic samples of B.
soporator from the coast of Maranh?o, Rio Grande do Norte and Bahia showed
cytogenetics patterns commons, but different morphological patterns. A sample from
the Atol das Rocas revealed conspicuous morphological and karyotypic
differentiation of another continental populations, confirming the presence of a new
island species. The approaches done reveal diversification consistent with
characteristics of a group of low vagile and largely able to environmental selection
due from peculiar ecological requirements<br>Os peixes da ordem Perciformes caracterizam-se como um modelo importante para
o entendimento da estrutura gen?tica de popula??es marinhas, pois apresentam
tanto exemplos de conserva??o cromoss?mica como de diversifica??o cariot?pica
para alguns grupos. Gobiidae ? a fam?lia mais especiosa no ambiente marinho. Entre
seus representantes, muitas esp?cies fazem parte de uma fauna cr?ptica pouco
percebida e estudada, apresentando ampla distribui??o com caracter?sticas
comportamentais e reprodutivas que as tornam prop?cias ? a??o de barreiras
biogeogr?ficas. Morfologicamente esta fam?lia apresenta estruturas corporais
reduzidas atrav?s de simplifica??es e regress?es. Dados citogen?ticos, apesar da
import?ncia em infer?ncias evolutivas, s?o incipientes frente sua diversidade de
esp?cies, sobretudo para esp?cies do Atl?ntico Ocidental. Visando estimar a
diversidade evolutiva em Gobiidae foram desenvolvidas an?lises citogen?ticas e dos
padr?es corporais, atrav?s de morfometria geom?trica, em cinco esp?cies presentes
no litoral brasileiro, Coryphopterus glaucofraenum, Bathygobius mystacium, B.
soporator, Ctenogobius smaragdus e C. Boleosoma. Os dados obtidos demonstram
marcante diversidade cariot?pica e morfol?gica entre as esp?cies. As invers?es
peric?ntricas e fus?es desempenham papel importante na evolu??o cromoss?mica
desta fam?lia, ocasionando diferen?as cariot?picas estruturais e num?ricas em todas
as esp?cies. Compara??es cariot?picas e morfol?gicas entre amostras geogr?ficas
de B. soporator provenientes do litoral do Maranh?o, Rio Grande do Norte e Bahia
evidenciaram padr?es citogen?ticos comuns, mas padr?es morfol?gicos diferentes.
Uma amostra proveniente do Atol das Rocas revelou consp?cua diferencia??o
cariot?pica e morfol?gica das demais popula??es continentais, confirmando a
presen?a de uma nova esp?cie insular. As abordagens empregadas revelam
diversifica??es compat?veis com um grupo com caracter?sticas de baixa vagilidade e
amplamente sujeito a sele??o ambiental decorrente de exig?ncias ecol?gicas
peculiares
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Lima, Filho Paulo Augusto de. "Diversidade cromoss?mica e padr?es ecomorfol?gicos em Gobiidae (Perciformes) no litoral e ilhas oce?nicas do Brasil." Universidade Federal do Rio Grande do Norte, 2015. http://repositorio.ufrn.br/handle/123456789/20584.
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Previous issue date: 2015-03-02<br>A fam?lia Gobiidae ? a mais diversificada no ambiente marinho, onde tamanha diversidade parece ter sido acompanhada por altera??es cromoss?micas significativas, a tornando um modelo biol?gico importante. Em geral apresentam ampla distribui??o geogr?fica com caracter?sticas comportamentais e reprodutivas que as tornam prop?cias aos efeitos de barreiras biogeogr?ficas. Comparados a outros representantes da ordem Perciformes apresenta caracter?sticas morfol?gicas reduzidas, com simplifica??es e perdas que dificultam estudos filogen?ticos e tornam imprescind?vel a associa??o de novas metodologias para melhor entendimento dos processos ecol?gicos e evolutivos que garantiram tamanha diversifica??o. Dados citogen?ticos para esp?cies presentes no litoral brasileiro s?o ?nfimos. Os resultados aqui apresentados, abrangendo um maior espectro taxon?mico e profundidade de an?lises, identificaram marcante diversidade cariot?pica estrutural interespec?fica para Coryphopterus glaucofraenum, Bathygobius mystacium, Bathygobius soporator, Bathygobius sp., Ctenogobius smaragdus, Ctenogobius boleosoma, Gobionellus oceanicus, Gobionellus stomatus, Microgobius meeki e Evorthodus lyricus. As esp?cies estudadas fazem parte de uma fauna cr?ptica pouco percebida e estudada, frequentemente impactadas, mesmo por eventos locais estoc?sticos. An?lises por morfometria geom?trica indicaram varia??o significante na morfologia corporal de esp?cies do g?nero Bathygobius e o reconhecimento de padr?es de varia??o de forma corporal referentes ao sexo, com popula??es mais dim?rficas em menores latitudes. T?cnicas citogen?ticas moleculares resolutivas aplicadas em estudos populacionais no litoral e em ilhas oce?nicas identificaram diferencia??es locais e reconheceram uma nova esp?cie para o g?nero Bathygobius, residente no Atol das Rocas e Arquip?lago de Fernando de Noronha. As an?lises ainda possibilitaram a descri??o de cromossomos sexuais XY nas duas esp?cies do g?nero Gobionellus e a participa??o de elementos repetitivos na diferencia??o deste sistema. Os dados aqui apresentados d?o suporte ao alto grau de diversifica??o evolutiva da fam?lia, ampliam o conhecimento citogen?tico para o grupo, permitem identificar estrutura??es populacionais e respostas evolutivas das esp?cies ?s varia??es geogr?ficas. Como modelo biol?gico a fam?lia Gobiidae representa um ?til contraponto evolutivo em rela??o aos padr?es gen?ticos vigentes ?s esp?cies de grande vagilidade.
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BRAGANÇA, Alexandre José Machado. "Pesca, alimentação, reprodução e crescimento do Amuré, Gobioides broussonnetii Lacepède, 1800 (Pisces : Gobiidae) no Estuário Amazônico, município de Vigia - Pará." Universidade Federal do Pará, 2005. http://repositorio.ufpa.br/jspui/handle/2011/4220.
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Previous issue date: 2005-03<br>Gobioides broussonnetii é o maior membro da família Gobiidae, e está distribuído no Atlântico Ocidental dos Estados Unidos até o Rio Grande do Sul. É abundante na foz do Rio Amazonas onde habita as águas salobras dos manguezais. Além de ser um importante elo na cadeia trófica do estuário amazônico, é um recurso pesqueiro explorado por pescadores artesanais. Estudaram-se aspectos da pesca, alimentação, reprodução e crescimento de Gobioides broussonnetii na baía de Marajó, município de Vigia, Pará, Brasil, entre setembro de 2003 e agosto de 2004. Exemplares para estudo foram adquiridos de pescadores locais e informações sobre a pesca foram obtidas através da observação de campo e entrevistas com os pescadores. No estudo da alimentação foi analisada a composição dos itens alimentares encontrados nos estômagos. A análise reprodutiva abordou aspectos do período reprodutivo e tamanho da 1a maturação gonadal. Foram estimados os parâmetros de crescimento utilizando o método indireto baseados nas análises das medidas de comprimento total de 1155 exemplares. G. broussonnetii é conhecida como amurés no estuário amazônico e é capturada no fundo lodoso em águas rasas sendo utilizada como isca na pesca comercial. De maneira geral é uma espécie fitófaga. Análises de conteúdo estomacal revelaram que algas da espécie Coscinodiscus concinus são alimentos mais consumidos. Há maior conteúdo estomacal durante a estação seca (julho a dezembro). O período entre janeiro e junho corresponde a época de atividade reprodutiva para essa espécie na área de estudo. O comprimento médio da primeira maturação gonadal foi de 23,9 cm. A razão sexual observada foi de 1:1. Os resultados obtidos neste estudo indicam que G. Broussonnetii usa o estuário amazônico como local de alimentação e reprodução. A análise macroscópica das gônadas indicou uma época de reprodução durante o inverno (janeiro a junho), com apenas um período de desova por ano entre fevereiro e abril. Foram encontrados nove grupos etários de G. btoussonnetii no estuário amazônico. Estimaram-se os valores de L∞ = 67,36 ( K=0,205 ano-1, Ø = 3,014). A relação peso-comprimento apresentou diferenças significativas entre machos e fêmeas, com as fêmeas que pesam mais que os machos.<br>Gobioides broussonnetii, the largest species of the family Gobiidae, is found in the western Atlantic Ocean, from the United States to Rio Grande do Sul, Brazil. It is abundant in the Amazon River estuary where it is typically found in the brackish waters of mangroves. Besides being an important link in the Amazon estuary food web, this species is a resource exploited by local fishermen. Fishing practices, diet, reproduction, and growth of Gobioídes broussonnetii were studied in Marajó Bay, municipality of Vigia, Pará state, Brasil, between September of 2003 and August of 2004. Specimens were obtained from local fishermen and information about fishing practices for this species were obtained through field-observation and from interviews with fishermen. The diet was studies by means of based on 314 specimens. Reproductive aspects included the period of reproduction and the size at first maturation of 749 specimens. Growth parameters were estimated using the indirect method based on the total lengths of 1155 specimens. Gobioides broussonnetii, known locally as "amure" in the Amazon River estuary, is captured on the muddy bottom in shallow water and is used as bait in commercial fishing. In general, the species is phytophagous, and stomach contents analyses showed the algae Coscinodiscus concinus to be most abundant food item Larger amount of food in the stomachs were recorded during the dry season (July to December). The reproductive period for G. broussonnetii in the study area ranged from January to June_ The mean length of the first gonadal maturation was 23,9 cm. The observed sex ratio was 1:1 (X²= 0,834, P<0,001). Results obtained in this study indicate that G. broussonnetii uses the Amazon estuary as an spawning, nursery, and feeding area. Macroscopic examination of the gonads indicated that the reproductive season tanges from January to June, although there is a single spawning per year, from February to April. Nine age groups of G. broussonnetll were found in the Amazon estuary. Estimates for growth parameters were obtained as follows: L∞ = 67,36 ( K=0,205 ano-1, Ø = 3,014). The length-weight relation was significantly different between males and females, with females heavier than males.
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Bielsa, Sabine. "Composition biochimique du périphyton et de Sicyopterus lagocephalus (Gobiidae, sicydiinae) dans différentes rivières de l'Ile de la Réunion : relations trophiques." Toulouse 3, 2000. http://www.theses.fr/2000TOU30200.
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Les variations mensuelles des caractéristiques morphophysiologiques et la composition biochimique (protéines, lipides) ont été suivies chez un piosson amphibiotique Sicyopterus lagocephalus dans trois rivières tropicales (Ile de la Réunion) au cours de seize mois. Simultanément, une évaluation quantitative et qualitative des ressources nutritives a été réalisée par l'analyse d'échantillons de périphyton. Afin de préciser les relations trophiques, les compositions en acides gras du périphyton et du poisson ont également été déterminées. Les résultats relatifs au périphyton indiquent que la biomasse algale et la valeur nutritive du périphyton sont maximales durant l'étiage hivernal. Le suivi de l'état physiologique des adultes de S. Lagocephalus a révélé, lors d'événements hydrologiques exceptionnels (1 mois de crues), une chute importante des lipides totaux somatiques suivie d'une longue période nécessaire à la reconstitution complète de ces réserves énergétiques et ceci malgré des conditions nutritionnelles redevenues favorables. La superposition du cycle de reproduction à ce moment-là explique ce résultat. Ce travail a été complété par l'analyse de la composition en acides gras afin de mettre en évidence l'influence de la nourriture disponible sur les poissons à différents stades du cycle vital et du cycle de production. Il est apparu qu'au stade juvénile, la migration du milieu marin vers les eaux douces s'accompagne d'une modification de la composition en acides gras des lipides totaux, d'un profil typique d'organismes marins vers un profil caractéristique de poissons dulçaquicoles sous l'influence de la ressource nutritive (périphyton). L'analyse réalisée sur différents tissus (carcasse, foie, gonades) de poissons capturés sur plusieurs sites au cours de l'élaboration des gonades et durant la saison de ponte a permis d'observer les modalités d'utilisation de différentes sources d'acides gras en réponse aux besoins physiologiques liés à la reproduction. Ces résultats ont été discutés en terme d'acides gras essentiels pour le succès de la reproduction et les possibilités de bioconversion des poissons.
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Piechnik, Cláudio Adriano. "Atividade da NA, K-ATPase e alterações histológicas nas branquias do peixe Bathygobius Soporator Valenciennes (Gobiidae) após exposição a diferentes salinidades." reponame:Repositório Institucional da UFPR, 2010. http://hdl.handle.net/1884/24271.
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Resumo: As brânquias de teleósteos marinhos realizam secreção de sal (NaCl) através das células de cloreto pela atividade da enzima Na+, K+ - ATPase com finalidade regulação osmótica-iônica para manutenção do teor hídrico e composição dos líquidos corporais de peixes. Para realizar este trabalho utilizamos representante sadultos do peixe tropical Bathygobius soporator (Valenciennes, 1837) coletados na baía de Guaratuba (Paraná, Brasil). A espécie estuarina eurialina se distribui naturalmente em locais onde a salinidade varia de 0ppm (gamboas) a 34ppm (planícies de maré). O objetivo do trabalho foi verificar a alteração na atividade Na+, K+ - ATPase e alterações morfológicas nas brânquias do peixe após exposição grupos de peixes (n=8) a salinidades de 0, 6, 17 e 34ppm após 12 e 96 horas de exposição. Os animais foram aclimatados por 7 dias e as condições abióticas foram mantidas constantes com temperatura a 26oC (±1oC), pH 7 e salinidade 17ppm, fotoperíodo de 12 h de luz e escuro. A redução na salinidade foi efetuada progressivamente através da diluição da água marinha com água filtrada e declorificada, numa taxa de aproximadamente 4 ppm a cada 2 horas. O aumento na salinidade foi efetuado progressivamente acrescentando-se sais marinhos artificiais à do aquário com o aumento numa taxa de aproximadamente 4 ppm a cada 2 horas. Foram considerados como controle os exemplares conservados em aquário com salinidade 17ppm. Em nossos experimentos obtivemos como valor limite mínimo de tolerância a baixa salinidade para a espécie 0ppm e limite máximo de tolerância 58ppm. As brânquias foram processadas para serem analisadas em microscopia óptica e microscopia eletrônica de transmissão. Alterações na salinidade da água levam a alterações significativas nas estruturas do epitélio branquial e menor grau de higidez em 6ppm e 0ppm. Pudemos observar nos tecidos branquiais descolamento do epitélio, hipertofia, fusão de lamelas secundárias, aneurisma e hemorragia. A atividade de enzima ATPase foi medida pelo procedimento que utiliza o bioensaio para piruvato kinase (PK)/ lactato desidrogenase (LDH). A atividade Na+/K+-ATPase branquial para é maior em salinidade 34ppm, se comparada a salinidade 6 e 0ppm, e é maior em salinidade 17ppm se comparada a salinidade 6ppm no teste de 12h e é maior em salinidade 34ppm, se comparada a salinidade 0 e 6ppm, e é maior em salinidade 17ppm se comparada a salinidade 0ppm no teste
de 96h.
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Frotte, Lou. "Réponses trophique et démographique aux perturbations de continuité écologique chez les espèces amphiromes de Guadeloupe." Thesis, Antilles, 2019. http://www.theses.fr/2019ANTI0405.
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Le macrofaune indigène des rivières insulaires caribéennes est constituée majoritairement d’espèces de poisson et de crustacé amphidromes. L’amphidromie est un cycle de vie caractérisé par la dévalaison des larves vers la mer suivi d’une dispersion larvaire marine, les juvéniles retournent en rivière pour grandir, y résider et se reproduire. Au cours de leurs migrations en rivière, ces individus rencontrent des perturbations de continuité écologique, telles que des barrages de hauteurs de chute variables. Ces ouvrages sont très largement répandus dans les rivières insulaires tropicales car ils permettent l’extraction de l’eau pour la production d’eau potable. Les objectifs de cette thèse ont été de caractériser leurs impacts sur la structure démographique et l’organisation trophique des populations de poissons et crustacés majoritaires aux Antilles et présentes sur l’ensemble du continuum de la rivière. Ce travail a été mené sur trois rivières de Guadeloupe afin d’analyser (1) la structure démographique de leurs populations et leur capacité à franchir les obstacles ; (2) la taille et le déplacement de leur niche trophique sous l’impact des obstacles à l’aide de l’analyse d’isotopes stables du carbone et de l’azote ; (3) l’évolution de la qualité nutritionnelle des sources de nourriture et la teneur en acides gras des consommateurs sur un gradient altitudinal grâce à des analyses lipidiques. Les résultats obtenus mettent en évidence (i) le rôle des embouchures comme lieu-clé assurant la résilience des milieux ; (ii) la qualité nutritionnelle des sources de nourritures comme l’un des éléments pouvant expliquer la montaison des espèces ; (iii) l’importance des transferts de matière allochtone de l’amont vers l’aval pour l’apport en acides gras essentiels ; (iv) le contexte environnemental au niveau de l’ouvrage déterminant les impacts démographiques et trophiques ; (v) des impacts trophiques visibles qui diffèrent en fonction des groupes fonctionnels, de leur place dans le réseau trophique et de la plasticité alimentaire des espèces<br>The native macrofauna of Caribbean island rivers consists mainly of amphidromous fish and crustacean species. Amphidromy is a life cycle characterized by the downstream migration of larvae towards the sea followed by a marine larval dispersion, juveniles return to the river to grow, reside and reproduce. During their migrations in rivers, these individuals encounter ecological continuity disturbances, such as dams with variable head heights. These dams are widespread in tropical island rivers because it enables the extraction of water for the production of drinking water. The objectives of this PhD were to determine their impacts on the demographic structure and trophic organization of the majority of fish and crustacean populations in the West Indies and present along the entire continuum of the river. This work was carried out on three rivers in Guadeloupe in order to analyze (1) the demographic structure of their population and their ability to overcome obstacles; (2) the size and shift of their trophic niche under the impact of obstacles using the analysis of stable isotopes of Carbon and Nitrogen; (3) the evolution of the nutritional quality of food sources and the fatty acid composition of consumers on an altitudinal gradient using lipid analysis. The results obtained highlight (i) the role of the rivermouth as a key place ensuring the resilience of environments; (ii) the nutritional quality of food sources as one of the driving forces that can explain the upstream migration of species; (iii) the importance of transfers of allochthonous material from upstream to downstream for the supply of essential fatty acids; (iv) the environmental context at the dam level determining demographic and trophic impacts; (v) visible trophic impacts that differ according to functional groups, their place in the food web and the food plasticity of the species
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Syaifullah. "Genetic variation and population structure within the Gudgeon genus Hypseleotris (Pisces-Eleotridae) in Southeastern Australia /." View thesis View thesis, 2000. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030508.154626/index.html.
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Thesis (Ph.D.)--University of Western Sydney, Hawkesbury, 1999.<br>"A Thesis submitted to the Faculty of Science and Technology in fulfilment of the requirements for the Degree of Doctor of Philosophy". "November 1999". Bibliography : leaves 147-155.
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Cristina, da Silva Maria. "A meiofauna como estoque alimentar para peixes juvenis (Gobiidae e Gerreidae) do Canal de Santa Cruz, Itamaracá, Pernambuco com ênfase aos Nematoda livres." Universidade Federal de Pernambuco, 2004. https://repositorio.ufpe.br/handle/123456789/946.
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Previous issue date: 2004<br>O presente estudo objetivou determinar a importância da meiofauna como fonte de alimento para os peixes das famílias Gerreidae (Diapterus rhombeus e Eucinostomus sp.) e Gobiidae (Bathygobius soporator e Gobionellus oceanicus). Considerando que os Nematoda constituem o grupo mais representativo da meiofauna no canal de Santa Cruz, Itamaracá PE, investigou-se se poderia existir uma seleção por parte dos predadores. As coletas se processaram em três meses de estiagem e três meses chuvosos em 1998/1999. Foram coletadas 4 réplicas na baixamar com um corer de 2,6 cm de diâmetro e 5,0 cm de comprimento. Os peixes juvenis cujo comprimento padrão do corpo variou de 1,7 a 5,5 cm, foram capturados com rede de arrasto de 1 mm de abertura. A meiofauna dos sedimentos e dos conteúdos gastro-intestinais foi separada através de peneiras com abertura de malhas de 0,044 a 0,5 mm. Cem Nematoda foram retirados das amostras sedimentológicas e todos os indivíduos dos conteúdos para identificação. Foram feitas análises de similaridade para o emprego das ANOSIM, MDS, e SIMPER. Onze táxons foram registrados, apresentando a densidade máxima em janeiro/99 (20.458 ind. 10 cm-2) e a menor em junho/99 (4.162 ind. 10 cm-2). Os táxons mais abundantes foram os Nematoda seguidos dos Copepoda. Os outros demais grupos apresentaram densidades que variaram temporalmente. Os índices de diversidade empregados para a meiofauna e Nematoda dos conteúdos não mostraram grande variabilidade sazonal. O MDS utilizado para correlacionar a meiofauna e aquela correspondente aos segmentos gastro-intestinais mostrou que, possivelmente, os peixes não se alimentam de todos os táxons determinados no ambiente, indicando uma seleção. O SIMPER mostrou que Copepoda e Nematoda são os táxons responsáveis pelo padrão de alimentação, sendo os primeiros os mais abundantes. Um total de 56 gêneros de Nematoda foram registrados no sedimento, sendo que, destes, três foram detectados somente no conteúdo gastro-intestnal dos peixes. Os mais abundantes foram Terschellingia longicaudata, Spirinia septentrionalis, Daptonema sp.1 e Theristus sp.2, tendo sido determinada uma espécie nova para o último gênero citado. A população nematofaunística esteve composta, principalmente por juvenis. A classificação trófica foi composta, principalmente, por comedores seletivos de depósito (1A) no período seco e por comedores de epistratos (2A) no período chuvoso. A ANOSIM indicou haver correlação significativa tanto para a nematofauna e os gerreídeos, como também para os gabiídeos. A equitabilidade acompanhou a diversidade, sendo mínimas em fevereiro. Os peixes estudados apresentaram uma preferência por Copepoda, enquanto os Nematoda, parecem ser um item negligenciado, não existindo preferência por qualquer gênero em particular. No entanto, foi possível concluir que a meiofauna representa um potencial considerável como alimento para níveis tróficos superiores, tendo em vista as altas densidades registradas. De acordo com a quantidade de indivíduos meiofaunísticos detectados no conteúdo gastro-intestinal dos peixes, a meiofauna deve ser compreendida como uma importante fonte energética para peixes juvenis estuarinos
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原田, 慈雄. "ウキゴリ属(Gymnogobius,Gobiidae)魚類の個体発生と生活史の進化に関する研究". 京都大学, 2005. http://hdl.handle.net/2433/145042.
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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第11642号<br>農博第1498号<br>新制||農||909(附属図書館)<br>学位論文||H17||N4035(農学部図書室)<br>23285<br>UT51-2005-D391<br>京都大学大学院農学研究科応用生物科学専攻<br>(主査)教授 田中 克, 教授 林 勇夫, 教授 中坊 徹次<br>学位規則第4条第1項該当
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Teichert, Nils. "Variabilité des traits d’histoire de vie chez les Gobiidae (Sicydiinae) amphidromes de l’île de la Réunion : Sicyopterus lagocephalus (Pallas, 1770) et Cotylopus acutipinnis (Guichenot, 1863)." Thesis, Pau, 2012. http://www.theses.fr/2012PAUU3024/document.
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Les Sicydiinae amphidromes constituent une part importante des peuplements piscicoles insulaires de la région Indo-Pacifique et sont vulnérables à de nombreuses pressions anthropiques (i.e. pêcherie, dégradation et fragmentation des habitats). La reproduction a lieu en eau douce, puis les jeunes dévalent en mer où ils débutent leur croissance pendant quelques mois avant de coloniser les rivières. L’objectif est d’acquérir des connaissances sur les traits de vie de S. lagocephalus (cosmopolite) et de C. acutipinnis (endémique). Les travaux de terrain démontrent que le choix de l’habitat quotidien est fortement lié aux interactions sociales, alors que l’habitat de fraie montre une forte sélection pour des conditions morphodynamiques favorisant l’oxygénation des oeufs. Les mâles sélectionnent des sites de ponte et gardent les oeufs. L’étude expérimentale de la survie en eau douce confirme que tous les embryons libres possèdent la capacité à rejoindre la mer. L’analyse des traits de vie marins à partir des otolithes des post-larves révèle des variations saisonnières d’âge et de taille au recrutement, en lien avec la croissance et la température marine. L’examen histologique des ovaires permet de décrire les variations spatiales et temporelles de l’activité de reproduction chez les femelles en rivière et de déterminer la fécondité et la taille de première reproduction. Les variations inter et intra-spécifiques des traits de vie sontcomparées en lien avec la répartition géographique des deux espèces. Ces travaux permettent d’identifier des perspectives concrètes dans le domaine de la gestion et de la conservation sur la base des caractéristiques de la stratégie amphidrome<br>Amphidromous Sicydiinae are particularly widespread among fish freshwater assemblages of the Indo-Pacific region and are vulnerable to anthropogenic pressures (i.e. fishery, degradation and fragmentation of habitats). Spawning and hatching happen in freshwater, then offspring drift downstream to the sea where they begin their growth for a few months before recruiting in the rivers. This study aims at acquire knowledge about life traits of S. lagocephalus (cosmopolite) and C. acutipinnis (endemic). Field sampling shows that the usual habitat choice is related to social interactions, whereasspawning habitat shows a strong selection for morphodynamic conditions which favor eggs oxygenation. Males select spawning sites and care for the eggs. The experimental study of freshwater survival confirms that free embryos survival and swimming capacities are enough to drift to the ocean. Marine life history analysis, based on postlarvae otoliths examination, reveals a seasonal variation of both age and size-atrecruitment related to the larval growth rate and the sea temperature. Histological examination of ovaries is used to describe the spatial and temporal variation of reproductive activity of mature females in the rivers, and to determine fecundity and size at first reproduction. Inter and intra-specific variations of life history traits are compared in relation to the respective geographical distribution of both species. This study identifies concrete prospects for management and conservation based on the features of amphidromous life history strategy
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Zapata, Fernando Alberto. "Local and regional patterns of distribution and abundance in marine reef fishes." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/184983.
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Local and regional patterns of distribution and abundance are documented in marine rocky-reef fishes. Chapter one describes limits of distribution and patterns of density variation of two fishes in a northern Gulf of California intertidal shore. The density of Sonora gobies (Gobiosoma chiquita) increases with tidal height over its intertidal range (-1.2 to 0.9 m), whereas the density of patchscale gobies (Gobiosoma sp.) decreases from the subtidal zone to 0.6 m above mean low water level. Both species exhibit higher densities during the warmer season when intertidal temperature gradients are weaker than during the colder season. Sonora gobies show a broader range of temperature tolerance than patchscale gobies but there is no evidence of shifts in distribution between seasons suggesting that the distributions of these species are not determined by temperature. Interspecific interactions may contribute to the patterns of intertidal distribution and abundance in these species despite the rigorous physical environment of the area. Chapter two documents a positive correlation between average local abundance and extent of geographic distribution in rocky-shore fishes from the Gulf of California. This correlation is not an artifact of sampling an arbitrarily defined region and is unlikely to be an artifact of sampling bias. The occurrence of this relationship in a variety of organisms suggests that the processes responsible for this pattern are likely to be similar in both terrestrial and marine environments despite fundamental differences between the two. Chapter three demonstrates that egg type and adult body size explain a considerable portion of the variation in extent of geographic range in marine reef fishes. Species with pelagic eggs have larger geographic ranges, longer larval lives, and larger body sizes than species with non-pelagic eggs. Small species with non-pelagic eggs show smaller geographic ranges than any other combination of body size and egg type. These biogeographic patterns predict a greater degree of genetic isolation among populations, and a greater species turnover over evolutionary time in clades of small species with non-pelagic eggs than in clades of species with other combinations of body size and egg type.
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Lissåker, Maria. "Paternal care, filial cannibalism and sexual conflict in the sand goby, Pomatoschistus minutus." Doctoral thesis, Stockholms universitet, Zoologiska institutionen, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1399.
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Natural and sexual selection and sexual conflict are forces shaping the evolution of reproductive behaviour, while constrained by factors like environment, physiology and life-history trade-offs. Parental care is costly both in terms of time and energy. In fish, filial cannibalism is a strategy for caring males to compensate for some of the energy loss. Human impact like eutrophication also alters the basics for animals living in that environment. It is fundamental to any species to adjust its behaviour to a changing environment. Studying sand goby males, I found trade-offs both regarding parental care allocations, like ventilation vs. predator defence, and investment in present vs. future reproductive success. Paternal sand gobies exposed to water with low oxygen levels increased their fanning effort but did not compensate by eating more eggs, even though an increased current parental effort should affect future reproductive success negatively. Investigating if patterns of filial cannibalism change with time of season, I found no correlation. Theory predicts that it should pay more to eat eggs early, when future mating potential is higher than late in the season. However, as early hatching fry are likely to gain higher fitness through larger size the next breeding season, this may provide an opposing selection pressure. In species with male care the only way a female can affect the level of post-spawning care is by choosing a good mate. A female preference to spawn in nests that already contain eggs of other females has been interpreted as a means to avoid filial cannibalism through a dilution effect or to decrease the costs of search time. Yet, in my study females did not avoid filial cannibalism by preferring large clutches to small ones. Oxygenation of the eggs might be a key factor, since both large and small females preferred spawning in nests with small clutches. Thus, as in most animals, trade-offs clearly govern the reproductive behaviour of sand gobies.
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Svensson, Ola. "Sexual selection in Pomatoschistus – nests, sperm competition, and paternal care." Doctoral thesis, Stockholm : Zoologiska institutionen, Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-298.
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Tweddle, Gavin Paul. "The influence of overwash and breaching events on the spatial and temporal patterns in ichthyofauna community composition in a temporarily open/closed southern African estuary." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1002957.
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This study assessed the importance of overwash and breaching events on the ichthyofaunal community structure in the medium-sized temporarily open/closed Mpekweni Estuary located on the southeast coastline of southern Africa. The fish in the littoral zone of the estuary were sampled using a 5m seine net while the channel region was sampled using two nets, a smaller meshed 30m seine net to target the estuarine spawning species and the juvenile estuarine-dependant marine spawners, and a larger meshed 50m seine net to target the larger marine and freshwater spawning species. Intensive monthly sampling over two years provided data on selected physico-chemical and biological parameters. During the two year sampling period from November 2005 to October 2007 the estuary breached in late July 2006 and remained open till the sandbar re-formed across the mouth in late December 2006. Thus, sampling encompassed three open/closed phases 1) initial closed period, 2) open period and 3) re-closed period after the berm was re-formed. The open period was divided into two phases 1) the out-flow phase and 2) the tidal phase. A total of 36 fish species representing 19 families were sampled using the various seine nets employed during the investigation. In the littoral zone, the estuarine spawners (Estuarine Utilisation Category, [EUC] I), mainly the Gobiidae, Glossogobius callidus, dominated the samples numerically and by biomass. The smaller estuarine spawning species sampled in the channel were numerically dominated by Gilchristella aestuaria in conjunction with two other EUC I species, Atherina breviceps and G. callidus. The estuarine-dependant marine spawners (EUC II), however, dominated the ichthyofaunal biomass of the channel. The abundance and biomass of the larger species targeted were dominated by estuarine-dependant marine spawning species (EUC II), principally Rhabdosargus holubi. During the closed periods of the estuary, total fish abundance and biomass displayed weak seasonal patterns. The breaching event and subsequent open period was associated with a decrease in the total abundances of fish in the littoral zone and channel of the estuary, reflecting the out-flow of estuarine biomass-rich water into the marine environment. The breaching event coincided with a shift in the community composition of the ichthyofauna, reflecting the recruitment of marine spawning species into the estuary. Numerical analysis identified two distinct spatial fish communities within the estuary, a community associated with the mouth region and one comprising the rest of the estuary. The absence of any further spatial patterns in the ichthyofaunal community structure within the Mpekweni Estuary appear to be ascribed to the virtual absence of horizontal patterns in physico-chemical and biological parameters recorded in the system. Cohort analyses were employed to determine possible recruitment events for selected estuarine and marine spawning species. The estuarine spawning species displayed continuous recruitment patterns throughout the study, which appeared to be unaffected by the breaching event. Conversely, the larger marine spawning species displayed multiple cohorts, indicating non-continuous recruitment. Subsequent retrospective analysis of cohorts for the different species identified summer recruitment peaks that coincided with the breaching event and open period. Minor recruitment of marine spawning species also occurred during overwash events. The recruitment of ichthyofauna into the estuary was quantified during three distinct hydrological events: overwash, out-flow phase immediately after breaching and tidal phase during the period when the mouth was open. Estimates of fish recruitment were highest during the outflow phase immediately after the estuary breached and declined as the estuary became tidally inundated with marine water. Although not as high as the outflow and tidal phases, recruitment was evident during overwash events. Results of the current study highlight the importance of both breaching and overwashing events in structuring the ichthyofaunal community composition in a medium-sized southern African temporarily open/closed estuary. These results are broadly in agreement with similar studies conducted both locally and in other regions of the world.
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Barhoumi, Badreddine. "Biosurveillance de la pollution de la lagune de Bizerte (Tunisie) par l’analyse comparée des niveaux de contamination et de l’écotoxicité des sédiments et du biote." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0075/document.
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L’objectif de cette thèse est le diagnostic de l’état de santé de la lagune de Bizerte par une approche multi-marqueurs (chimique, biochimique et morphométrique) et multi-compartiments (sédiment et biote). Pour atteindre cet objectif, les modèles biologiques choisis sont la moule Mytilus galloprovincialis et le poisson gobie Zosterisessor ophiocephalus. Ces deux espèces sont largement répandues dans la lagune de Bizerte et la mer Méditerranée. Dans une première partie et afin d’estimer les niveaux de contamination de la lagune de Bizerte par les polluants organiques persistants (POPs), des analyses chimiques, granulométriques et minéralogiques (COT) de sédiments superficiels ont été réalisées. Par la suite la toxicité potentielle des sédiments a été évaluée par une batterie de bioessais. Dans une troisième partie la biodisponibilité et l’impact écotoxicologique des POPs étudiés ont été évalués par l’accumulation de ces contaminants au niveau des deux organismes indicateurs choisis et l’étude des réponses biologiques associées à travers quelques biomarqueurs tels que la catalase (CAT), l’acide thiobarbiturique (TBARS); l’Ethoxyrésorufine O-dééthylase (EROD); la glutathion-S-transférase (GST) et l'acétylcholinestérase (AChE). Les principaux résultats des analyses chimiques révèlent une contamination générale des sédiments et organismes étudiés par les POPs. Les niveaux de contamination sont fonction de l’espèce et de la station étudiée. La comparaison de nos valeurs avec les données de la littérature a montré que les niveaux de contamination de la lagune sont similaires ou légèrement inférieurs à ceux enregistrés dans des écosystèmes équivalents dans d’autres pays du monde. L’estimation de la toxicité des sédiments au moyen des valeurs guides sédimentaires (ERL, ERM, TEL et PEL) et trois tests biologiques (Microtox®, SOS-Chromotest® et test MELA) ont montré que les sédiments des stations du canal de Bizerte S1 et S3 représentent un danger accru pour les organismes aquatiques. Nos résultats ont montré que les biomarqueurs mesurés chez les deux espèces choisies sont des paramètres sensibles et inductibles permettant de qualifier l’état de santé des organismes et la qualité globale du milieu étudié. Les marqueurs morphométriques contrairement aux marqueurs biochimiques n’ont pas permis de discriminer les différents sites étudiés. Contrairement aux poissons, il a été démontré chez les moules que les facteurs abiotiques ont une influence sur les concentrations en POPs et les réponses des biomarqueurs.Au vu de l’ensemble de ces résultats, il apparaît que cette approche intégrative associant des mesures chimiques et écotoxicologiques représente un bon moyen pour évaluer la qualité de l’environnement notamment dans le cadre de programmes de biosurveillance<br>The objective of this thesis was the diagnosis of the health status of the Bizerte lagoon using a multi-marker (chemical, biochemical and morphometric) and multi-compartment approach (sediment and biota). To achieve this objective, the selected biological models were the mussel Mytilus galloprovincialis and the goby fish Zosterisessor ophiocephalus. Both species are widespread in the Bizerte lagoon and the Mediterranean Sea. In a first part and in order to estimate the levels of contamination of the Bizerte lagoon, persistent organic pollutant (POPs), granulometric and mineralogical (TOC) analyses of surficial sediments were carried out. Afterwards, the potential toxicity of sediments was assessed by a battery of bioassays. In a the third part, bioavailability and ecotoxicological impact of POPs studied were assessed by bioaccumulation measurement in these two indicators species, and the study of biological responses associated through a battery of biomarkers such as catalase (CAT), thiobarbituric acid (TBARS); Ethoxyresorufin O-deethylase (EROD); glutathione-S-transferase (GST) and acetylcholinesterase (AChE). The main results of the chemical analyses show a general contamination of sediments and organisms studied by POPs. Contamination levels are dependent on the studied species and stations. Comparing our values with literature data, showed that the levels of contamination of the lagoon are similar or slightly lower than equivalent ecosystems in other parts of the world. Besides, the estimation of sediment toxicity, using sediment guideline values (ERL, ERM, TEL et PEL), as well as bioassays (Microtox®, SOS-Chromotest® and MELA test) showed that stations of canal of Bizerte S1 and S3 were associated with an increased hazard to aquatic organisms. Our results showed that biomarkers measured in both selected species are sensitive and inducible parameters, which allowed to characterize the health status of organisms and global quality of the studied environment. Biochemical but not morphometric markers allowed to discriminate the different studied sites according to chemical risk. Unlike fish, it has been demonstrated in mussels that abiotic factors influence the concentrations of POPs and biomarker responses.Obtained data suggest that integrative approach, combining chemical and ecotoxicological measurements, may represent a good way to asses the quality of the environment, particularly, in the context of biomonitoring programs
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Theobald, Kylie. "Comparative tolerances of non-indigenous brindled goby and native exquisite goby to salinity, temperature and sediment." 2007. http://adt.waikato.ac.nz/public/adt-uow20070510.130422/index.html.
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Slámová, Tereza. "Fylogenetické vztahy mezi druhy hlaváčů linie Gobius (Gobiidae)." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-367902.
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Gobiidae is one of the largest families of teleost fishes with nearly 2000 species currently recognized. They have a worldwide distribution with exception of Arctic and Antarctic areas, inhabiting marine, brackish and freshwaters. Mostly, they are small-sized and live inconspicuously on the bottom. Their phylogeny has been studied only partially. In Europe, three independent lineages of gobies exist (Gobius-, Aphia- and Pomatoschistus-lineage), most of the species of these lineages are marine. In this work, I performed a multilocus study of the Gobius-lineage encompassing the majority of the species. Mitochondrial (cytochrome b and cytochrome c oxidase I) as well as nuclear (rhodopsin and recombination activating gene) markers were used. 480 individuals of 30 species were analyzed in the laboratory and sequences of further 25 - 32 species were downloaded from the Genbank and added to a dataset of each marker according to availability. Mitochondrial markers were more informative than the nuclear ones. The usefulness of cytochrome c oxidase I for studying phylogenetic relationships of gobies was compared with cytochrome b. Cytochrome c oxidase I showed to be useful for identification of the species, but has some limitations in resolving deeper phylogenetic relationships in gobies. Cytochrome b showed...
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Lu, Ying-tzu, and 盧盈慈. "Diet and feeding habit of Smilosicyopus leprurus （Actinopterygii: Gobiidae）." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/05399025009420352245.
Full textAbstract:
碩士<br>國立中山大學<br>海洋科學系研究所<br>103<br>Fin-eating is a unique feeding behavior in fish and there is no study shows that any fin-eaters present in the Gobiidae to date. Smilosicyopus leprurus was observed to tear off other fishes'' fin and swallowed when kept in aquarium. Smilosicyopus leprurus inhabit in upstream and distribute in Hengchun Peninsula、the east and the northeast in Taiwan. The aim of this study is to investigate whether this feeding behavior occurs in the field and whether this species can be considered a fin-eater. Fourteen individuals S. leprurus are captured from streams in Pintung, Taiwan. Food habits of S. leprurus are examined by stereomicroscope and cloning of stomach contents. A fin clip was found in one of the 14 stomach contents. According to the blast of COI sequence, fin clip belongs to the fish genus Sicyopterus. The analysis of stomach contents of S. leprurus revealed that the food of the fish consists of aquatic insects (90%), fin clip (5%) and fish scales (5%). Smilosicyopus leprurus have fin-eating behavior in the wild. Even though S. leprurus doesn’t feed on fins exclusively, this species is cosnsidered a fin-eater.
The phylogenetic tree is reconstructed by neighbor-joining with cytochrome b and cytochrome c oxidase subunit I gene in twenty-nine species of nine genera in Sicydiinae. The phlogenetic tree shows that S. lepruru in Taiwan and S. leprurus collected from the Okinawa Island are same species.
The complete mitochrondrial genome of S. leprurus are sequenced for future research on the phylogeny and evolution of Gobiidae.
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Sim, Tara K. "Reproductive biology of Eleotris sandwicensis, a Hawaiian stream gobioid fish." Thesis, 2006. http://hdl.handle.net/10125/20935.
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Chen, Jie-Ting, and 陳玠廷. "The systematics of the genus Priolepis (Teleostei: Gobiidae) from Taiwan." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/43724615819358582434.
Full textAbstract:
碩士<br>國立臺灣海洋大學<br>海洋生物研究所<br>96<br>The genus Priolepis Valenciennes, 1837 belongs to a group of small marine benthic gobies. The phylogenetic hypothesis established in previous research suggests that the presence of transverse rows of sensory papillae is regarded as plesiomorphic feature, and remaining species without those papilla pattern can be separated into two main groups.
This research examine the systematics of Priolepis species from Taiwan, and reconstruct molecular phylogeny with partial sequence of mtDNA ND5 gene in order to test the hypothesis made by morphological characters.
The result of molecular phylogeny rejects the aspect that presence of transverse row of papillae is plesiomorphic. Trimma Jordan and Seale, 1906 is outgroup of Priolepis and Egglestonichthys Miller and Wongrat, 1979 is located within Priolepis. Priolepis can be separated into two monophyletic groups, and is suggested to separate into two nominal subgenera, Priolepis and Quisquilius Jordan and Evermann, 1903, by status of predorsal scales or pattern of sensory papillae.
This research eventually collected nine valid species of Priolepis from Taiwan, including two new records, P. nuchifasciatus (Gunther, 1873) and P. pallidicincta Winterbottom and Burridge, 1993; two undescribed species P. sp. 1 and P. sp. 2. Till present, there are at least 11 valid species of Priolepis around Taiwan.
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Huang, Shih-Pin, and 黃世彬. "Taxonomy of Rhinogobius(Teleostei: Gobiidae)from the Hanjiang basin, China." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/30507282107484489119.
Full textAbstract:
碩士<br>國立屏東科技大學<br>野生動物保育研究所<br>94<br>This studies for morphological taxonomy and phylogenic relationship of Rhinogobius species are carried out from the Hangjiang basin, southern China. This research is employed mitochondrial DNA D-loop sequence for molecular phylogenetic study; and detailed morphological comparison with all valid Rhinogobius species from the southern China. For molecular phylogenetic studies, all three clustering methods as neighbor-joining method, maximum parsimony method and maximum likelihood method with congruent overall topology, all OTUs are split to two main clades, and this result seems to be supported with morphological studies. Furthermore, the groups SP3 and SP4 belong to a sister group, groups SP5 and SP6 belong to another sister group. The combinative results of morphological taxonomy and molecular evidences can concluded that there are six discrete Rhinogobius species except nominal species R. leavelli in the Hangjiang basin and possibly five species are belonging to undescribed species.
Keywords: China, Hanjiang basin, Rhinogobius, Taxonomy, Phylogenetics
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Chen, Kuan-Te, and 陳寬德. "The systematics and molecular phylogeny of Fusigobius (Teleostei: Gobiidae) from Taiwan." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/54712130741604974054.
Full textAbstract:
碩士<br>國立臺灣海洋大學<br>海洋生物研究所<br>100<br>The genus Fusigobius whitely, 1930 is a group of small marine benthic gobies. There are 11 valid species in the World so far.
This research focus on all available Fusigobius species collected from Taiwan. There are 6 valid species species including an undescribed species and a newly recorded species: Fusigobius melacron. The molecular phylogenetic approach has been conducted by 4 fragments of partial sequences of mtDNA ND5 (about 990 bp), Cyt B (801 bp), COI (648 bp) and ND2 (530 bp) genes.
The result of molecular phylogenetic approach support the Thacker’s view (2003) for good separation for both genera as Coryphopterus and Fusigobius. Despite of overall similarity of the two genera, the two genera can be well distinguished by the presence and absence of predorsal dermal ridge.
The overall topology of phylogenetic tree can be correlated to the different reduced patterns of pelvic fins. The undescribed species, Fusigobius sp. supported by both morphological and molecular data can be well distinguished from distinct coloration patterns especially the diagnostic pattern of first dorsal fin.
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Pedro, Tânia Sofia Santiago. "Padrões de crescimento em otólitos de larvas de Pomatoschistus pictus (Pisces, Gobiidae)." Master's thesis, 2006. http://hdl.handle.net/10400.1/279.
Full textAbstract:
Dissertação mest., Biologia Marinha, Universidade do Algarve, 2006<br>Pomatoschistus pictus (Malm, 1865) é uma das espécies mais abundantes nos substratos arenosos costeiros do Parque Marinho da Arrábida, e um importante predador intermédio no meio bentónico. Assim, e dada a especial relevância do estudo das características larvares desta espécie, foram investigados os padrões de crescimento nos otólitos sagittae de 87 larvas de P. pictus capturadas em Julho de 2002, através do seccionamento frontal dos otólitos. As larvas analisadas apresentavam tamanhos entre os 4.55 mm e os 18.58 mm SL, com otólitos de diâmetro máximo entre os 85 μm e os 560 μm, e idades estimadas entre os 17 e os 69 dias. As relações de crescimento foram lineares para toda a amostra, verificando-se uma proporcionalidade constante entre o crescimento do otólito e o crescimento somático. A taxa de crescimento somático integrada foi de 0.25 mm dia-1, valor significativamente superior ao registado para outros gobídeos, de águas temperadas ou tropicais. Os tamanhos à eclosão retrocalculados (1.76-2.77 mm TL) foram inferiores aos descritos na literatura. Os resultados obtidos apontam, assim, para um rápido crescimento nas primeiras fases críticas de desenvolvimento, o que poderá estar na base do sucesso desta espécie.
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Troyer, Emily. "Microhabitat Association of Cryptobenthic Reef Fishes (Teleostei: Gobiidae) in the Central Red Sea." Thesis, 2018. http://hdl.handle.net/10754/627886.
Full textAbstract:
Knowledge of biodiversity within an ecosystem is essential when trying to understand the function and importance of that ecosystem. A challenge when assessing biodiversity of reef habitats is cryptobenthic fishes, which encompass many groups that have close associations with the substrate. These fishes can be behaviorally cryptic, by seeking refuge within the reef matrix, or visually cryptic, using cryptic coloration to match the surrounding habitat. These factors make visual surveys inadequate for sampling these fishes. One such group of cryptobenthic fishes are the gobies, family Gobiidae, which currently represent over 1600 species, although new species are continually being discovered. Gobies are often small (less than 5 cm), and many species will be associated with a very specific microhabitat type. Due to the understudied nature of the Red Sea, little is known about habitat preferences of gobies within the region. In order to determine the differences in goby community structure within the central Red Sea, fishes were sampled at one reef using 1 m² enclosed rotenone stations from three distinct microhabitats: hard coral, rubble, and sand. Following collection, specimens were photographed and sequenced using COI, to aid in species identification. 232 individuals were collected representing 31 species of goby. Rubble microhabitats were found to host the majority of collected gobies (69%), followed by hard coral (20.6%), then sand (9.9%). Goby assemblages in the three microhabitats were significantly different from each other, and evidence of habitat-specialists was found. These results provide essential baseline information about the ecology of understudied cryptobenthic fishes that can be used in future large-scale studies in the Red Sea region.
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Kroon, Frederieke Janet. "Protogynous hermaphroditism in a temperate reef fish, the blackeye goby, Coryphopterus nicholsii (Pisces: Gobiidae)." Thesis, 1997. http://hdl.handle.net/2429/6649.
Full textAbstract:
In this thesis, I examine the occurrence of protogynous hermaphroditism in the blackeye
goby, Coryphopterus nicholsii (Pisces, Gobiidae) at Bamfield, Vancouver Island, Canada. The
female biased sex ratios, size distributions of female and male C. nicholsii, and histological data
all confirm that the species is protogynous. Histological data strongly suggest two patterns of
sexual ontogeny, with males resulting from either pre- or post-maturational sex change. Sex
change is not common during, and immediately after the breeding season.
The social organization of C. nicholsii is based upon the year-round defense of a territory,
primarily by large individuals of both sexes. A territory always includes one or more shelter rocks.
These are used as refuges by both sexes, and as nest sites by males during the breeding
season. The defence of a shelter rock is important in reproduction, in the reduction of predation,
and the avoidance of adverse environmental conditions. Suitable refuge and nest site rocks are a
limited resource and intraspecific competition determines which individuals gain access to them.
Since the outcome of competition for suitable shelter rocks is strongly size-specific, large males
monopolize spawnings.
Large males receive a disproportionate share of the matings: males smaller than 7.0 cm
were never seen nesting in the field. Yet, approximately 30% of males are smaller than 7.0 cm,
indicating that many females change sex at smaller sizes. This early sex change confers a
growth advantage: small, non-nesting males grow faster than similarly-sized mature females. As
a result, small males may obtain nesting male status more rapidly than females that change sex
later in life. The presence of early sex changers may also be related to an alternative mating
tactic, sneak spawning.
Sex change is correlated with a reduction in whole-body concentration of 17(3-estradiol,
and an increase in 11-ketotestosterone concentration. Both steroids occur naturally in female and
male gobies. Administration of 11- ketotestosterone, its precursor 11-ketoadrenosterone, and an
aromatase inhibitor (Fadrazole) resulted in complete sex change in mature females. These
results strongly suggest that both 17B-estradiol and 11- ketotestosterone are involved in
mediating sex change in this goby.
These results are discussed with regards to the geographical disparity of protogynous
hermaphroditism in teleosts. Protogyny occurs much more frequently on tropical coral reefs than
on temperate rocky reefs. I propose that a difference in the occurrence of certain mating systems
in tropical and temperate waters partly explains this disparity.
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Wen, Zong-Han, and 溫宗翰. "The systematics and molecular phylogenetic analyses of Mudskippers and Eel gobies(Perciformes: Gobiidae) from Taiwan." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/xjnubg.
Full textAbstract:
碩士<br>國立臺灣海洋大學<br>海洋生物研究所<br>102<br>The mudskippers and eel gobies are living in mangroves, estuaries, lagoon as well as the coastal waters with sandy to muddy substratum. In Taiwan, the species diversity of this group has been revised at least consisting of 9 genera and 10 valid species. These two kinds of gobies are divided into two subfamilies of Oxudercinae and Amblyopinae currently. However, the further to detect and research for phylogenetic relationship of this group and advise these two subfamilies belong to one subfamily of Oxudercinae.
The head lateral-line system of this group have been reexamined and checked in detail for those main taxa. All members of fish genera represent as the loss of any head canal system except Apocryptodon punctatus, Boleophthalmus pectinirostris, Scartelaos histophorus and Oxuderces dentatus with reduced anterior oculoscapular canal system of three pores. In the osteology, these two kinds of gobies have the small palatine separated with Quadrate in the suspensorium and they lack the scapula in the pectoral fin girdles.
This research for phylogenetic approach has been employed mitochondrial 12sRNA, 16s RNA, CO1 and complete mitochondrial DNA sequence. In nuclear gene we employed the partial sequences of zic member family 1, myosin, heavy polypeptide 6 sequences, Ryanodine receptor 3-like protein, SH3 and PX domain-containing 3-like protein. Our survey for this group has found that there is no well separation for both groups in the nuclear genes. However, in the complete mitochondrial gene show the group of eel gobies is belong inside one clade of the mudskipper. According to phylogenetic result from mitochondrial DNA sequences, both groups can be considered as a single subfamily Oxudercinae with a series of support from morphological features.
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Huang, Shih-Pin, and 黃世彬. "The systematics and molecular phylogeny of Hemigobius generic group (Teleostei: Gobiidae) in Taiwan and southern China." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/6umg29.
Full textAbstract:
博士<br>國立臺灣海洋大學<br>海洋生物研究所<br>102<br>This study focused on systematics and molecular phylogenetic research of Hemigobius generic group species collected from Taiwan and southern China. In addition to 7 genera and 15 species of Hemigobius generic group collected from Taiwan and China, the genera Brachygobius and Pandaka and other 13 related Hemigobius generic group species collected from Southeast Asia region also examined and analysed. Phylogenetic research have been carry out based on morphological feature and molecular evidence in this study. The molecular phylogenetic analysis based on the mitochondrial Cytb and D-loop complete sequence and partial COI and ND5 sequence for each species, and using complete mitochondrial DNA sequence for molecular phylogenetic analysis of inter-genus level among Hemigobius generic group. One new genus(Wuhanlinigobius), three new species(Pseudogobius taijiangensis, Pseudogobius fulvicaudus and Wuhanlinigobius malayensis) and four newly recorded species (Pseudogobius gastrospilos, Mugilogobius chulae, Mugilogobius mertoni and Mugilogobius myxodermus) have been descrided during our study. On the other hand, our studies have been confirm that Hemigobius crassa is a valid species; and also reveals Pseudogobius gastrospilos should be considered as senior synonym of Pseudogobius melanostictus. Our study reveal Hemigobius generic group phylogenetic tree consists of two monophyletic groups, monophyletic group I consist of genera Brachygobius and Pandaka; monophyletic group II divided into four major clades, in this lineage, clade I consist of Pseudogobiopsis and Redigobius; clade II consist of Wuhanlinigobius; in clade III, the Calamiana and Pseudogobius, Hemigobius and Mugilogobius are belong to sister group respectively.
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Maake, Pholoshi Abram. "Molecular systematics of the South African gobiid fishes of the genus glossogobius gill, 1862 (teleostei : gobiidae)." Thesis, 2009. http://hdl.handle.net/10386/538.
Full textAbstract:
Thesis (M.Sc. (Zoology)) --University of Limpopo, 2009<br>The genus, Glossogobius Gill, 1862 belongs to the family Gobiidae, a large fish family represented by several thousand species. In southern African there are about 51 genera comprising about 107 species. It has been suggested that gobies underwent an extensive ecological radiation, with species
diversifying into marine, brackish and freshwater habitats. The genus Glossogobius has about 22 species with an Indo-west Pacific distribution. The overall aim of the current study was to examine the systematics of Glossogobius in southern Africa using molecular markers in an attempt to clarify
the geographic distribution and species status.
A total of 131 individuals of G. callidus were collected from rivers and estuaries throughout the species’ distribution in two southern African biogeographic regions (subtropical and warmtemperate) using six-meter seine nets, while individuals of G. tenuiformis were only collected in
KwaZulu-Natal region. Additional specimens and taxa were downloaded from Genbank and also loaned from the SAIAB DNA collection and the Art Gallery and Museum of the Northern Territory(NTM), Darwin Australia. This study employed mtDNA cytochrome b (cyt b) and the nuclear S7 ribosomal protein gene intron 1 (S7 intron 1) as genetic markers. In determining the phylogeographic
structure of the river goby general methods such as AMOVA, demography analyses, network of haplotypes and phylogenetic tree reconstruction were employed. Evolutionary relationships within the genus were resolved by employing parsimony (MP), Bayesian Inference (BI) and Maximum likelihood (ML) tree reconstruction analyses. Both MP and ML were computed in PAUP* while BI was computed using Mr Bayes.Initially, a large-scale assessment of the genetic structure and diversity of G. callidus was undertaken. This species has a wide distribution in most estuaries and coastal river systems along the
east coast of southern Africa, and in inland freshwater systems from the north-eastern parts. Overall,patterns of haplotype relatedness, high haplotypic diversity related to low nucleotide diversity, and
mismatch distribution analysis supported a population expansion hypothesis with continued restricted dispersal and gene flow. Two major historically isolated lineages (5% divergence, cyt b)were identified within this species, one comprising subtropical samples (KwaZulu-Natal lineage),and the other including the majority of the warm temperate localities and a few subtropical localities(EC, Eastern Cape lineage). Glossogobius callidus individuals collected from riverine localities within the EC lineage were geographically structured and support the general hypothesis of structure among freshwater species while the estuarine individuals were less structured. Although, the individuals from these two lineages were morphologically inseparable, the high genetic separation between the two conforms to the reports that G. callidus is a species complex. The results further revealed some evolutionary significant units (Nkanini/Kosi bay lineage, and Mozambique) in the KZN lineage, KwaZulu-Natal. However, there were other identified localities with restricted gene flow and some degree of reproductive isolation that were not evolutionary significant. Thus, the results indicate that G. callidus is a species with relatively strong population and phylogeographic
structure in southern Africa.The validity of the species of the genus Glossogobius in southern Africa (G. callidus and G. giurus
with its synonymy G. tenuiformis) was investigated by estimating the relationships among the Glossogobius taxa in southern Africa, using the same molecular markers. Based on a model selected under AIC in Modeltest, ML analysis of the dataset also recovered a phylogram which was similar to
MP and BI in recognising the major clades in many respects. All analyses recovered monophyly for all southern African species of the genus. Although the cyt b analyses included Glossogobius species from Australia, there was no evidence of a phylogeographic break between the two continents.
However, it appears that each southern African Glossogobius species has a sister species occurring in Australia according to the cyt b dataset. Glossogobius aureus was revealed as the probable sister species to G. tenuiformis while the African G. giuris group was monophyletic with the Australian G.
giuris. The two G. callidus groups that appear to represent two unique species (sp. 1 and sp. 2) were also sister taxa to the undescribed Glossogobius sp. from Australia. It could be postulated that this
inter-continental species relationships were a result of either allopatric or sympatric speciation events, to the ancestral taxa of each of these three sister groups which in turn split up during the Gondwana breakup. The inclusion of G. celebius (a freshwater and brackish species with an Asian
and Oceania distribution) in the S7 intron dataset did not affect the monophyly of southern African species. However, this species appears to be more basal in the genus than the southern African
species. The results further indicated that G. tenuiformis (previously a synonym of G. giuris) forms a separate clade that is distinct from the G. giuris species group. Although G. tenuiformis and G. giuris
formed a monophyletic group in all analyses involving the S7 intron 1, individuals from each species were monophyletic and strongly supported. The scanning electron micrographs of the cheek papillae of the two species further revealed morphological differences. The congruence between both morphology and molecular data indicated that G. tenuiformis is unequivocally distinct from G. giuris and it is therefore suggested that the taxonomic status of the G. giuris group be revised.<br>National Research Foundation, the Ernst and Ethel Eriksen Trust, the South African Institute for Aquitic Biodiversity (SAIAB), and the University of Limpopo