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Academic literature on the topic 'Larval stage'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Larval stage"

1

Einer, H., and E. Ellegård. "Nasal myiasis by Oestrus ovis second stage larva in an immunocompetent man: case report and literature review." Journal of Laryngology & Otology 125, no. 7 (May 24, 2011): 745–46. http://dx.doi.org/10.1017/s002221511100096x.

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AbstractObjective:We report a case of an Oestrus ovis larva which developed into the second larval stage within a healthy, immunocompetent human, and we review the relevant literature.Methods:Clinical case report and Pubmed search of reports of human nasal myiasis due to Oestrus ovis, especially those describing the larval stage.Results:Humans are not normally hosts of the sheep nasal bot fly, but infestations by its larvae have been described. The eye is the most common site, but larvae have occasionally been found in the human nose. Transformation of larvae into the second and third stages, within the human nose, is even more uncommon.Conclusion:To the best of our knowledge, we report the first Swedish case, and the third case world-wide, of Oestrus ovis larval development beyond the first larval stage, within an immunocompetent, healthy human.

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Rötzer, Marie A. I. N., and Joachim T. Haug. "Larval Development of the European Lobster and How Small Heterochronic Shifts Lead to a More Pronounced Metamorphosis." International Journal of Zoology 2015 (2015): 1–17. http://dx.doi.org/10.1155/2015/345172.

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We redescribe the larval stages of the European lobster,Homarus gammarus, based on autofluorescence composite imaging. We focus on larval stages (II) to (IV). Compared to the American lobster,Homarus americanus, differences are most apparent in stage (III). This stage appears more mature inH. gammarus; for example, the rostrum is already curved and bears spines, and the appendages are better developed and longer and more differentiated. InH. americanusstage (III) shows a stronger resemblance to stage (II). As a result of the morphology of stage (III), the “metamorphic” moult between stage (III) and stage (IV) inH. gammarusis less drastic than inH. americanus. Metamorphosis is characterised by two criteria. It involves (1) a drastic change in morphology in (2) a short amount of time. It has hence been suggested that a more pronounced metamorphosis evolves by two factors affecting these criteria, namely, (1) the evolution of specialised larval features, which increase the morphological disparity between larva and adult that makes the change of morphology more drastic, and (2) the skipping of entire stages. This means larval forms ancestrally moult over several intermediate forms into the definite adult morphology. Yet, in more derived forms the stages with intermediate morphologies are no longer expressed; highly specialized larvae moult into the adult within a single moult (in the most extreme case) hence bridging the morphologies of larvae and adult in a shorter amount of time. The example of the twoHomarusspecies demonstrates that this explanation is not the only possible one. Additionally, differences of a single larval stage (in this case larval stage (III)) can lead to a more or less metamorphic-appearing ontogenetic sequence.

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Mulyana, Jeane Siswitasari, Achmad Farajallah, and Yusli Wardiatno. "Redescription of Larval Development in Cultured Pearl Oyster Pinctada maxima." ILMU KELAUTAN: Indonesian Journal of Marine Sciences 23, no. 2 (June 21, 2018): 109. http://dx.doi.org/10.14710/ik.ijms.23.2.109-112.

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Larval development plays a major role in efficient pearl culture. The cultured larvae will be later used for recipient and donor oysters in cultured pearl production. Larval developmental stage of silver lip pearl oyster Pinctada maxima has been reported by several studies. Those studies used female and male oyster parents directly taken from natural habitat.This study aimed to redescribe larval development of P. maxima from commercial pearl oyster culture farm in Indonesia. Larval development of this species whose parents are originated from selected groups in the pearl culture farm has not been reported yet, thus it is necessary to be described. This species undergoes specific larval developmental stage. The larvae were observed under microscope, and then the average shell length (SL) and shell height (SH) were measured. D-shaped veliger larva (77.4±0.3 µm SL; 65.4±1.1 µm SH) appeared 20 h after fertilization. Tenday-old larva (156.2±2.8 µm SL; 149.5±5.6 µm SH) had developed umbo region so it was called umbonal larva. Umbonal larva then developed further into plantigrade larva (411.3±9.8 µm SL; 380.5±6.9 µm SH) in 25 days after fertilization. Developmental stage and larval sizein P. maxima is similar with those observed in P. fucata and P. margaritifera. Keywords: growth, larva, plantigrade, shell, umbo, veliger

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Rye, Leslie A., and Michael R. Baker. "The life history of Hysterothylacium analarum Rye and Baker, 1984 (Nematoda: Anisakidae) in Lepomis gibbosus (Pisces: Centrarchidae) in southern Ontario, Canada." Canadian Journal of Zoology 70, no. 8 (August 1, 1992): 1576–84. http://dx.doi.org/10.1139/z92-217.

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Larval stages of Hysterothylacium analarum are described from Lepomis gibbosus in Dawson Pond, Ontario (45°10′N, 78°50′W). Second-stage larvae were easily distinguished from all other stages by the presence of a conical boring tooth. Third-stage larvae lacked both a boring tooth and lips. Fourth-stage larvae had well-developed lips. The ratio of ventricular appendage length to intestinal caecum length varied greatly between larval stages and adults. Prevalence and intensity of larval stages and adult H. analarum showed a distinct seasonal pattern, with one generation of adult worms per year. In spring, third-stage larvae left nodules on the intestinal serosa of L. gibbosus and migrated to the intestinal lumen, where they rapidly moulted to the fourth-stage and then to adult worms. Eggs collected from gravid females developed to second stage larvae in approximately 5 days under laboratory conditions. In natural infections in the late summer second-stage larvae were found in nodules on the serosa and in the mesentery. Larvae apparently moulted to the third stage and overwintered in the nodules as third-stage larvae.

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Watanabe, H., R. Kado, S. Tsuchida, H. Miyake, M. Kyo, and S. Kojima. "Larval development and intermoult period of the hydrothermal vent barnacle Neoverruca sp." Journal of the Marine Biological Association of the United Kingdom 84, no. 4 (August 2004): 743–45. http://dx.doi.org/10.1017/s0025315404009841h.

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Larvae of the hydrothermal vent barnacle Neoverruca sp. were reared under laboratory conditions and larval development was observed. Under these conditions, the larvae were released from adults as first-stage nauplii, although the larvae of other deep-sea barnacles have generally been considered to be released at a later larval stage such as the cyprid stage. The larvae of Neoverruca sp. were lecithotrophic through six naupliar stages and the subsequent cyprid stage. The larval period of Neoverruca sp. was more than 96 days under the present rearing conditions, which is the longest yet reported for barnacles. Most cyprid larvae, however, exhibited abnormal morphology and no larvae settled successfully on the substrate. These observations suggest that such a long larval period might enable neoverrucid barnacles to disperse between vent fields.

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XU, TIAN, CHAOSHU ZENG, and KATE S. HUTSON. "Morphological descriptions of the larval and first juvenile stages of the decorator crab Camposcia retusa (Latreille, 1829) from laboratory-reared material." Zootaxa 4577, no. 2 (April 5, 2019): 295. http://dx.doi.org/10.11646/zootaxa.4577.2.4.

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The complete larval and first crab stages of the decorator crab Camposcia retusa (Latreille, 1829) are described and illustrated based on laboratory-reared material for the first time. Specimens were obtained from larvae hatched from adult crabs collected from coral reefs of Queensland, Australia. Newly hatched larvae were successfully reared to settlement as the first-stage crabs. Larval development consisted of two zoeal stages and one megalopal stage. The morphology of each larval stage was compared with those available from a previous study using material from the Red Sea. Due to substantial differences in morphology of the second zoeal and megalopal stages between the two studies, we argue that these larval stages described by the earlier report may not be that of C. retusa. Finally, the morphological characters of both larval and first crab stages of C. retusa are also compared with the corresponding stages of previously reported Inachidae.

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ANASTASIADOU, CHRYSSA, ALEXANDROS NTAKIS, and IOANNIS D. LEONARDOS. "Larval development of the freshwater shrimp Atyaephyra desmarestii (Millet, 1831) sensu lato (Decapoda: Caridea: Atyidae) and morphological maturation from juveniles to adults." Zootaxa 2877, no. 1 (May 13, 2011): 41. http://dx.doi.org/10.11646/zootaxa.2877.1.2.

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A complete serial of larval staging of Atyaephyra desmarestii (Millet, 1831) sensu lato from Louros River (north-western Greece) was obtained in the laboratory and described in detail. Thirty berried females were collected and transferred to an aquarium containing water and vegetation from the sampling site. The newly hatched larvae were transferred into small sterile aquaria and mass cultured. After each moult, several larvae were photographed and preserved with their exuviae. The reared larvae of A. desmarestii sensu lato passed through six zoeal stages and one megalopal stage. At the experimental conditions, the durations of each larval stage were as follows: three days for the 1 st larval stage; three to four days for 2 nd larval stage; six to eight days for 3 rd ; seven to nine days for 4 th ; nine to ten days for 5 th , 6 th and megalopal stages. All the obtained stages were described in detail. The larval morphological characters of the described material and the larvae specimens collected from natural populations were compared with the literature data on closely related species. Morphological description of the different phases for juveniles, immature, female and male mature individuals of A. desmarestii sensu lato are also presented in detail.

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Abrunhosa, Fernando A., Darlan J. B. Simith, Joely R. C. Monteiro, Antonio N. de Souza Junior, and Pedro A. C. Oliva. "Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil." Anais da Academia Brasileira de Ciências 83, no. 4 (October 21, 2011): 1269–78. http://dx.doi.org/10.1590/s0001-37652011005000045.

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Feeding is an important factor for the successful rearing of larvae of the crab species. Further information on the morphological features of the foregut may to reveal larval feeding behaviour and or/whether there is a lecithotrophy in some or even in all stages of the larval cycle. In the present study, the structural development of the foregut and their digestive functions were examined in larvae of two brachyurans, Uca vocator and Panopeus occidentalis, reared in the laboratory. During larval development, the foreguts of the larvae in the first and last zoeal stages and in the megalopa stage were microscopically examined, described and illustrated. The zoeal foreguts of both species were well developed, showing specialization with a functional cardiopyloric valve and a filter press. The megalopa stage had a complex and specialized gastric mill similar to that found in adult crabs with the appearance of rigidly calcified structures. These results support the hypothesis that the feeding behaviour of each larval stage is directly related to the morphological structure of the foregut. Such facts strongly indicate that all larval stages of both . vocator and P occidentalis need an external food source before completing the larval development in a planktonic environment.

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Duneau, David F., and Brian P. Lazzaro. "Persistence of an extracellular systemic infection across metamorphosis in a holometabolous insect." Biology Letters 14, no. 2 (February 2018): 20170771. http://dx.doi.org/10.1098/rsbl.2017.0771.

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Organisms with complex life cycles can differ markedly in their biology across developmental life stages. Consequently, distinct life stages can represent drastically different environments for parasites. This difference is especially striking with holometabolous insects, which have dramatically different larval and adult life stages, bridged by a complete metamorphosis. There is no a priori guarantee that a parasite infecting the larval stage would be able to persist into the adult stage. In fact, to our knowledge, transstadial transmission of extracellular pathogens has never been documented in a host that undergoes complete metamorphosis. We tested the hypothesis that a bacterial parasite originally sampled from an adult host could infect a larva, then survive through metamorphosis and persist into the adult stage. As a model, we infected the host Drosophila melanogaster with a horizontally transmitted, extracellular bacterial pathogen, Providencia rettgeri . We found that this natural pathogen survived systemic infection of larvae (L3) and successfully persisted into the adult host. We then discuss how it may be adaptive for bacteria to transverse life stages and even minimize virulence at the larval stage in order to benefit from adult dispersal.

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Zavala-Leal, I., S. Dumas-Lapage, and R. Peña-Martinez. "ORGANOGÉNESIS DURANTE EL PERIODO LARVAL EN PECES." CICIMAR Oceánides 26, no. 2 (December 4, 2011): 19. http://dx.doi.org/10.37543/oceanides.v26i2.100.

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La presencia de un periodo larval caracteriza a los peces con ontogenia indirecta. Este periodo de desarrollo implica una serie de transformaciones encaminadas a la adquisición de las características biológicas y ecológicas propias de la especie; y en muchos casos culmina con cambios de distribución y hábitos alimenticios. El periodo larval incluye cuatro estadios de desarrollo: larva vitelina, larva pre-flexión, larva flexión y larva post-flexión. Cada estadio de desarrollo presenta características asociados a cambios en las diferentes prioridades durante el crecimiento. De esta forma, durante los estadios de larva vitelina y larva pre-flexión, la prioridad es incrementar las posibilidades de supervivencia a través de enfatizar la capacidad alimenticia y de evasión de depredadores, lo cual se ve reflejado en una mayor diferenciación de estructuras asociadas a estas funciones. La larva flexión se caracteriza por presentar un mayor grado de funcionalidad de los órganos y estructuras desarrolladas anteriormente. Finalmente, durante el estadio de larva post-flexión se presentan los cambios más agudos con respecto a la funcionalidad de los órganos ya desarrollados. En el presente trabajo se realiza la descripción del desarrollo de estos órganos para cada uno de los estadios de desarrollo larval, haciendo referencia en las diferencias y semejanzas entre distintas especies de importancia comercial. Organogenesis during the larval period in fishes The presence of a larval period is characteristic of fishes with an indirect ontogeny. Many transformations involved in this period lead to the acquisition of biological and ecological characteristics of each species, that culminate in changes in distribution and feeding habits. Larval period includes four developmental stages: viteline larvae, pre-flexion larvae, flexion larvae and post-flexion larvae. Each developmental stage showed inherent characteristics associated with changes in priorities during growth. During the viteline larvae and pre-flexion larval stages, priority is about increasing the survival possibility through an increase in the capacity of feeding and escaping predators which is reflected in the development of structures involved in these activities. The flexion larva is characterized by a greater degree of functionality of organs and structures previously developed. Finally, the post-flexion larvae show the most drastical changes in the functionality of developed organs. In this work, we present a description of the development of these organs, taking into account differences and similarities between species.

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Dissertations / Theses on the topic "Larval stage"

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Jones, A. E. "Stage-structured insect population models of larval competition." Thesis, University of Strathclyde, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381490.

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Cole, Alison G. "Cell-lineage of the larval CNS in the ascidian Ciona intestinalis, neurula stage through to hatched larva." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0021/MQ57277.pdf.

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Saunders, Laura Margaret. "Infection strategies of gamebird macroparasites." Thesis, University of Stirling, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341230.

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Matzilevich, David Avicenna. "Molecular analysis of superoxide dismutase and other antioxidant enzymes of Toxocara canis." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266226.

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Lewis, Solange Smita. "Identification of stress-responsive genes in the early larval stage of the fathead minnow pimephales promelas." Cincinnati, Ohio : University of Cincinnati, 2005. http://rave.ohiolink.edu/etdc/view.cgi?acc_num=ucin1134665105.

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Thesis (Ph. D.)--University of Cincinnati, 2005.
Advisor: Stephen Jay Keller. Title from electronic thesis title page (viewed Apr. 22, 2009). Keywords: fathead minnow; differential display; larvae; real-time PCR; copper; zinc; thermal stress; stress; gene expression. Includes abstract. Includes bibliographical references.

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Stanley, Jenni Anne. "Ambient underwater sound: measuring the importance of spatial viariability and its effect on late stage larval crabs." Thesis, University of Auckland, 2011. http://hdl.handle.net/2292/6975.

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Recent studies have shown that underwater sound emanating from coastal reefs may be used for guiding the movements of a wide range of reef organisms to suitable settlement habitats. However, it is not known whether this underwater sound is also capable of mediating the settlement and metamorphosis processes in these organisms. The present study used laboratory- and field-based methods to determine whether ambient underwater sound is used as a settlement and metamorphosis cue in 10 species of larval crabs. The settlement stage larvae of five common crab species showed marked changes in swimming behaviour consistent with settlement and showed a significant decrease in time to metamorphosis (TTM) when exposed to replayed ambient reef sound compared with a silent control. Ambient underwater sound has the potential to convey valuable information about the type and suitability of the habitat at its source to settlement stage pelagic larvae provided different habitats produce distinctive underwater sound. Analyses of recordings from several different habitat types along the coast of north-eastern New Zealand showed that the sound emanating from different habitat types had marked differences in terms of gross character, i.e., spectral composition and sound level. When habitat specific sounds were used in laboratory- and field-based experiments a significant decrease in TTM was observed for settlement stage crab larvae exposed to favourable settlement habitat sound when compared to unfavourable habitats. Behavioural thresholds for habitat sound were determined experimentally by exposing settlement stage larvae to a range of sound levels from both favourable and unfavourable habitat types for settlement. Larvae did not respond to sound from unfavourable habitat types. However, for sound from favourable habitat types for settlement most crab species showed increasing reductions in TTM as sound levels were increased, suggesting that proximity to the sound source or settlement habitat is important in inducing faster settlement. The results presented in this thesis demonstrate that ambient underwater sound originating from coastal habitats mediates the settlement processes of the megalopae of many common coastal crab species in both temperate and tropical waters. It provides evidence that differences in the spatial and biological characteristics of underwater sound play a significant role in this process. Overall, the results of this research greatly extend our knowledge of the importance of underwater sound to recruitment processes of coastal larvae.
Whole document restricted until August 2012, but available by request, use the feedback form to request access.

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Lewis, Solange Smita. "Identification of Stress-Responsive Genes in the Early Larval Stage of the Fathead Minnow Pimephales Promelas." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1134665105.

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Almeida, Mara Cristina [UNESP]. "Desenvolvimento ontogenético larval e variabilidade populacional de Pimelodus britskii em um reservatório neotropical." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/143104.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Pimelodus britskii, uma espécie endêmica da bacia do rio Iguaçu, apresenta poucos estudos que envolvam desenvolvimento ontogenético e parâmetros populacionais, deste modo, trabalhos que envolvam esses caracteres são de suma importância, para tomada de medidas de uso e conservação da espécie. Neste trabalho abordamos, no primeiro artigo, o desenvolvimento larval, proporções corporais e subsídios para diferenciar a larva nas fases iniciais de desenvolvimento das suas congenéricas. No segundo artigo avaliamos as modificações, ao longo do espaço e do tempo, com relação à abundância, proporção sexual, tamanho de primeira maturação, comprimento médio, relação peso/comprimento, e atividade reprodutiva. Em relação às larvas, inicialmente a pigmentação era escassa e intensificou-se com o desenvolvimento. O comprimento padrão variou de 2,6 a 13,11mm e os miômeros de 34-50. A espécie apresentou alometria negativa do comprimento da cabeça, altura do corpo, distância pré-dorsal e distância pré-anal em relação ao comprimento padrão e altura da cabeça, comprimento do focinho e diâmetro do olho em relação a comprimento da cabeça, e as estruturas corporais em todas as fases larvais de desenvolvimento são cartilaginosas. Foram capturados na totalidade 9.204 indivíduos, em quatros locais diferentes de coletas em 9 (nove) etapas. Evidenciou que a população de P.britskii, por diferentes etapas e locais, apresentou diferença significativa em seus parâmetros populacionais. A maior abundância (CPUE) ocorreu na etapa I e na estação de coleta Cavernoso (Cav). O comprimento médio da população variaram 15,5±6,2 cm, sendo os indivíduos maiores capturados na Etapa III e na estação de coleta Iate Clube Candói (Iat). O crescimento foi alométrico negativo, como o melhor fator de condição (K), encontrado na etapa III e na estação Iat, como ocorreu também para o comprimento médio. O índice de atividade reprodutiva (IAR), na escala temporal foram mais intenso na etapa I e no espaço na estação Cav. E em relação a diferentes estações de coleta, foram mais intenso nas estações quente (verão) e praticamente nulo na estações mais frias (outono). Considerando estes resultados podemos inferir que a população apresenta tendência à estabilização.
Pimelodus britskii, an endemic species of Iguaçu River basin, has scarce studies involving ontogenetic development and population parameters. So studies involving these characters are of great importance to take protection e conservation measures. This study presents, in the first paper, body proportions and subsidies to differ larval initial developing phases larval of its congenerics. The second paper evaluated changes, over space and time, related to abundancy , sexual proportion, first maturation size, medium lengh , weight /size relation and productive activity. The larvae initially pigmentation was scarce and intensified with the development, the standard length ranged from 2.6 to 13.11mm and myomeres from 34-50. The findings showed negative head length allometry, body height, predorsal length and pre-anal distance from the standard length and head height, snout length and diameter of the eye in relation to head length and structures in all larval stages of development are cartilaginous. 9.204 individuals were captured in nine years in four different collection places. It showed that the population of P.britskii, through different stages and places significant difference in their population parameters. The highest abundance (CPUE), occurred in stage I and Cavernous collection station (Cav). The average length of the population ranged 15.5 ± 6.2 cm, with the largest individuals caught in Stage III and gathering station Candói Yacht Club (Iat). The allometric growth was negative as the best condition factor (K) found in step III and Iat station as also observed for the mean length. The reproductive activity index (IAR), the temporal scale were more intense in stage I and space in Cav station. And in relation to different collection stations were more intense in the warm seasons (summer) and virtually nil in colder seasons (autumn). Considering these results we can conclude that the population has a tendency to stabilize.

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Lyncker, Lissa. "Abundance and Distribution of Early Life Stage Blue Crabs (Callinectes sapidus) in Lake Pontchartrain." ScholarWorks@UNO, 2008. http://scholarworks.uno.edu/td/848.

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I conducted a 12-month study of near-shore habitats in Lake Pontchartrain to assess spatiotemporal variation in the abundance of early life stage blue crabs (Callinectes sapidus). Collections were made using a 1 m2 throw trap and data showed that C. sapidus numbers varied over time and among sites. Two recruitment events occurred during the study. During the first recruitment in May-June, C. sapidus entered Lake Pontchartrain via the Inner Harbor Navigational Canal. In September-October, C. sapidus entered the Lake Pontchartrain via the Rigolets and Chef passes. My data suggest that C. sapidus utilize water circulation within the Lake Pontchartrain as a means of transportation throughout the estuary. MODerate-resolution Imaging Spectroradiometer (MODIS) 250 m data were analyzed to gain a large-scale view of suspended sediments patterns within Lake Pontchartrain and quantify water movement. Field sampling along with remote sensing proved to be beneficial when assessing estuarine-wide C. sapidus post-larval dispersal processes.

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Foulon, Valentin. "Etude du phénomène d'adhésion chez la larve d'huître creuse Crassostrea gigas au stade pédivéligère." Thesis, Brest, 2018. http://www.theses.fr/2018BRES0094/document.

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Les huîtres présentent un cycle de vie en deux phases : les larves pélagiques s’adhérent avant de se métamorphoser pour une vie benthique.L’adhésion larvaire se fait au stade pédivéligère par sécrétion d’un bioadhésif produit par un organe spécialisé : le pied. Bien que l’huître Crassostrea gigas soit un organisme d’importance économique et écologique, et un modèle d’étude en biologie marine, le phénomène d’adhésion chez la larve pédivéligère est peu documenté. Une étude morphologique des larves pédivéligères par histologie et microscopie électronique a été réalisée, afin de décrire les glandes responsables de la sécrétion de l’adhésif. Une composition majoritairement protéique de l’adhésif a été révélée par histochimie et spectroscopie FTIR.Une analyse in silico des données transcriptomiques disponibles chez C. gigas a permis d’identifier des gènes probablement impliqués dans l’adhésion.Deux analyses protéomiques, menées sur les larves entières et l’adhésif sécrété ont permis de caractériser des protéines en lien avec la biosynthèse et la structure de l’adhésif. Une protéine de type collagène apparaît impliquée dans la structure de l’adhésif de C. gigas. Cette première approche de l’étude de l’adhésion de C. gigas, permet d’envisager la valorisation biotechnologique des molécules identifiées. Le développement d’adhésifs biomimétiques, élaborés sur le principe des bioadhésifs marins, autoriserait le collage en milieu humide, et serait une alternative aux adhésifs synthétiques qui malgré leur toxicité, dominent le marché mondial
Oysters show a two-phase life cycle: pelagic larvae adhere before metamorphosis into benthic life. Larval adhesion occurs at the pediveliger stage by secretion of a bioadhesive produced by a specialized organ: the foot. The oyster Crassostrea gigas is an organism of economic and ecological importance, and a model for study in marine biology, but the phenomenon of adhesion in the pediveliger larvae is poorly documented. A morphological description of the pediveliger larvae by histology and electron microscopy was performed to describe the glands responsible for the secretion of the adhesive.A predominantly proteinaceous composition of the adhesive was revealed by histochemistry and FTIR spectroscopy. An in silico analysis of available transcriptomic data from C. gigas was made to identify genes probably involved in adhesion. Two proteomic analyses, performed on whole larvae and on the secreted adhesive, characterizing proteins related to biosynthesis and adhesive structure. A collagen-like protein appears to be involved in the adhesive structure of C. gigas. This first approach to the study of the adhesion of C. gigas makes it possible to consider the biotechnological enhancement of the identified molecules. Despite their toxicity, synthetic adhesives dominate the world market. The development of biomimetic adhesives, based on marine bioadhesive strategies could be an alternative, and allowing furthermore bonding in wet condition

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Books on the topic "Larval stage"

1

Pratt, Richard. A 96-hr static renewal acute lethal toxicity test (LCb50s) of pentachlorophenol to the first larval stage of Pandalus danae. Bellingham, Wash: Huxley College of Environmental Studies, Western Washington University, 1988.

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Hubner, Donald M. Comparative effects of early versus late starvation on the development of the post-larval, megalopopa, stage of the crabs Hemigrapsus nudus, Cancer magister, and Cancer oregonensis. Bellingham, WA: Huxley College of Environmental Studies, Western Washington University, 2002.

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Smith, Kenneth G. V. An introduction to the immature stages of British flies: Diptera larvae, with notes on eggs, puparia, and pupae. London: British Museum (Natural History), 1989.

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Watson, William. Development of kelp rockfish, Sebastes atrovirens (Jordan and Gilbert 1880), and brown rockfish, S. auriculatus (Girard 1854), from birth to pelagic juvenile stage, with notes on early larval development of black-and-yellow rockfish, S. chrysomelas (Jordan and Gilbert 1880), reared in the laboratory (Pisces: Sebastidae). Seattle, Wash: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, 2004.

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Larval stages of northeastern Atlantic crabs: An illustrated key. London: Chapman & Hall, 1992.

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Žd̕árská, Zdeňka. Evolution of morphological features in larval stages of digenetic trematodes. Praha: Academia, nakl. Československé akademie věd, 1986.

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Ingle, R. W. Larval stages of Northeastern Atlantic crabs: An illustrated key / Ray Ingle. London: Chapman and Hall, 1992.

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Mwaluma, James. A guide to commonly occuring larval stages of fishes in Kenyan coastal waters. Mombasa: WIOMSA, 2014.

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Fahay, Michael P. Early stages of fishes in the western North Atlantic Ocean: Davis Strait, Southern Greenland and Flemish Cap to Cape Hatteras. Dartmouth, N.S: Northwest Atlantic Fisheries Organization, 2007.

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Larvae of anomuran and brachyuran crabs of North Carolina: A guide to the described larval stages of anomuran (families Porcellanidae, Albuneidae, and Hippidae) and brachyuran crabs of North Carolina, U.S.A. Leiden: Brill, 2003.

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Book chapters on the topic "Larval stage"

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Guidi, Alessandra, Roberto Gimmelli, Alberto Bresciani, and Giovina Ruberti. "Luminescence-Based, Low- and Medium-Throughput Assays for Drug Screening in Schistosoma mansoni Larval Stage." In Methods in Molecular Biology, 219–27. New York, NY: Springer US, 2020. http://dx.doi.org/10.1007/978-1-0716-0635-3_18.

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Davis, T. L. O., and V. D. Lyne. "Dispersal of the larval stage of southern bluefin tuna, Thunnus maccoyii, in the east Indian Ocean." In Coastal and Estuarine Studies, 137–48. Washington, D. C.: American Geophysical Union, 1994. http://dx.doi.org/10.1029/ce045p0137.

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Dockins, Kelt. "State." In Design Patterns in PHP and Laravel, 199–214. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-2451-9_23.

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Hawkey, Kerensa, John Brameld, Tim Parr, Andrew Salter, and Heidi Hall. "Suitability of insects for animal feeding." In Insects as animal feed: novel ingredients for use in pet, aquaculture and livestock diets, 26–38. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789245929.0004.

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Abstract This chapter explores the nutritional composition of insects and the potential benefits and drawbacks for their inclusion into pet, poultry, pig, ruminant and aquatic animal feeds. Six species are most commonly described for use in animal feed, namely black soldier fly (BSF; Hermetia illucens) larvae and prepupae, yellow mealworm (YM; Tenebrio molitor) larvae, superworm (SW; Zophobas morio) larvae, lesser mealworm (LM; Alphitobius diaperinus) larvae, house fly (HF; Musca domestica) larvae and house crickets (HC; Acheta domesticus). The nutritional composition, variability observed due to manipulation of feed source, age, developmental stage and suitability for inclusion into animal feed are compared.

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Paredes, Estefania, Pablo Heres, Catarina Anjos, and Elsa Cabrita. "Cryopreservation of Marine Invertebrates: From Sperm to Complex Larval Stages." In Cryopreservation and Freeze-Drying Protocols, 413–25. New York, NY: Springer US, 2020. http://dx.doi.org/10.1007/978-1-0716-0783-1_18.

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Ueberschär, Bernd, Carmen Navarro-Guillén, Ana Gomes, Ivar Rønnestad, Carlos Rojas-Garcia, Inken Hanke, Dagh Sommerfeld, and Robert Tillner. "Variability in Digestive Enzyme Capacity in Early Stages of Marine Fish Larvae: Ontogenetic Variations, Biorhythms, Hormonal Control and Nutrient Sensing Mechanisms." In Emerging Issues in Fish Larvae Research, 87–129. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73244-2_4.

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Asplin, Lars, Karin K. Boxaspen, and Anne D. Sandvik. "Modeling the Distribution and Abundance of Planktonic Larval Stages ofLepeophtheirus salmonisin Norway." In Salmon Lice, 29–50. Oxford, UK: Wiley-Blackwell, 2011. http://dx.doi.org/10.1002/9780470961568.ch1.

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Roberts, Brian. "Photoperiodic Regulation of Prothoracicotropic Hormone Release in Late Larval, Prepupal and Pupal Stages ofSarcophaga bullata." In Ciba Foundation Symposium 104 - Photoperiodic Regulation of Insect and Molluscan Hormones, 170–88. Chichester, UK: John Wiley & Sons, Ltd., 2008. http://dx.doi.org/10.1002/9780470720851.ch11.

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Doi, Wataru, Tomokazu Murakami, Akira Mizutani, Shinya Shimokawa, and Hiroyoshi Kohno. "Numerical Analysis of the Dynamic State of Coenobita brevimanus Larvae in Amitori Bay." In Geophysical Approach to Marine Coastal Ecology, 261–73. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-1129-5_16.

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Putchkov, A. V. "State-of-the-art and world perspectives of studies on tiger beetle larvae (Coleoptera, Carabidae, Cicindelinae)." In Carabid Beetles: Ecology and Evolution, 51–54. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-0968-2_8.

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Conference papers on the topic "Larval stage"

1

Takahashi, Satoru, Satoru Takahashi, Masami Hamaguchi, and Masami Hamaguchi. "SEASONAL VARIATION OF TRANSPORTATION OF ASARI CLAM, RUDITAPES PHILIPPINARUM, LARVAE IN HIROSHIMA BAY." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b4315cbb321.

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Hiroshima Bay is located in western part of the Seto Inland Sea, and there is high productivity of Asari clam. However, the landings amount of the clam was rapidly decreased and production areas came to be limited in the northern part (bay head). Here, the clam has the planktonic larval stage. Then, it is important to reveal the transportation process of larvae to clarify the habitat connectivity of the clam. Therefore, in this study, we try to clarify the transportation process of the clam larvae in the Hiroshima Bay by numerical model experiments. As a result of model experiments, in June (rainy and heating season), the larvae are transported to southward in western area of Hiroshima Bay. In November (dry and cooling season), distribution of larvae is limited in the northern area of Hiroshima Bay. These results are corresponding to the field observation results. In the Seto Inland Sea, it is said that there is spawning time of the clam twice a year (spring and autumn). However, in a recent Hiroshima Bay, the density of the larva in spring is very low than that in autumn. These facts suggest that the production of the clam is limited in the northern area of Hiroshima Bay because the density of the larva is low in spring when the larvae can extend to the south.

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Takahashi, Satoru, Satoru Takahashi, Masami Hamaguchi, and Masami Hamaguchi. "SEASONAL VARIATION OF TRANSPORTATION OF ASARI CLAM, RUDITAPES PHILIPPINARUM, LARVAE IN HIROSHIMA BAY." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b937f57cd63.62615734.

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Hiroshima Bay is located in western part of the Seto Inland Sea, and there is high productivity of Asari clam. However, the landings amount of the clam was rapidly decreased and production areas came to be limited in the northern part (bay head). Here, the clam has the planktonic larval stage. Then, it is important to reveal the transportation process of larvae to clarify the habitat connectivity of the clam. Therefore, in this study, we try to clarify the transportation process of the clam larvae in the Hiroshima Bay by numerical model experiments. As a result of model experiments, in June (rainy and heating season), the larvae are transported to southward in western area of Hiroshima Bay. In November (dry and cooling season), distribution of larvae is limited in the northern area of Hiroshima Bay. These results are corresponding to the field observation results. In the Seto Inland Sea, it is said that there is spawning time of the clam twice a year (spring and autumn). However, in a recent Hiroshima Bay, the density of the larva in spring is very low than that in autumn. These facts suggest that the production of the clam is limited in the northern area of Hiroshima Bay because the density of the larva is low in spring when the larvae can extend to the south.

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Vargas, Valeria. "Dengue virus exposure at the larval stage induced immune priming inAedes aegyptiadult mosquitoes." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.113081.

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Eprilurahman, Rury, and Nishfi Laila Maghfiroh. "The tadpole of Leptobrachium hasseltii Tschudi. 1838 (Amphibia: Anura: Megophryidae): Morphometry and larval developmental stage as identification character of species." In THE 6TH INTERNATIONAL CONFERENCE ON BIOLOGICAL SCIENCE ICBS 2019: “Biodiversity as a Cornerstone for Embracing Future Humanity”. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0015681.

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Silivanova, E. A., P. A. Shumilova, and M. A. Levchenko. "INFLUENCE OF INSECTICIDE BREEDING ON BIOLOGICAL PARAMETERS OF MUSCA DOMESTICA L. (DIPTERA: MUSCIDAE)." In V International Scientific Conference CONCEPTUAL AND APPLIED ASPECTS OF INVERTEBRATE SCIENTIFIC RESEARCH AND BIOLOGICAL EDUCATION. Tomsk State University Press, 2020. http://dx.doi.org/10.17223/978-5-94621-931-0-2020-80.

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The goal of the current research was to evaluate the biological parameters of insects when they were exposed to insecticides for several generations. In the experiments, the adults of the house fly Musca domestica L. were feed with one of two insecticides (chlorfenapyr or fipronil) in each generation. The duration of development stages, fecundity, the weight of larvae, pupa, and adults, as well as the sizes of females and males, were evaluated. The statistical significance of differences in biological parameters was assessed by the non-parametric Kruskal-Wallis and Dunn criteria. The duration of the larva stages lasted 2.2 times more in the fourth generation of chlorfenapyr- and fipronil-exposure strains compared to the control laboratory strain of M. domestica. Increasing the period of preimaginal stages of the insect life cycle can be considered as a sublethal effect of insecticides.

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Liu, Shaoying, Juhua Chang, and Guonian Zhu. "Developmental Toxicity of Triadimefon in Embryo-Larval Stages of Zebrafish." In 2010 International Conference on Digital Manufacturing and Automation (ICDMA). IEEE, 2010. http://dx.doi.org/10.1109/icdma.2010.347.

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Rodrigues de Lima, Lucas, Eudamara Barbosa da Silva Acosta, Ariadne Barbosa Goncalves, Marcio Carneiro Brito Pache, Diego Andre Sant'Ana, Celso Soares Costa, Hemerson Pistori, Alessandro dos Santos Ferreira, and Carina Elisei. "Application of Superpixel to identify Maggots and their larval stages." In 2019 XV Workshop de Visão Computacional (WVC). IEEE, 2019. http://dx.doi.org/10.1109/wvc.2019.8876927.

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Wang, Ying. "TA/TYR regulates division of labor at both larval and adult stages." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.113775.

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Thacker, Hayden, and Daniel I. Hembree. "NEOICHNOLOGICAL STUDY OF BURROWING DARKLING BEETLES (COLEOPTERA: TENEBRIONIDAE) FROM LARVAL TO ADULT STAGES." In Joint 69th Annual Southeastern / 55th Annual Northeastern GSA Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020se-344182.

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Khozyaev, I. A., D. V. Rudoy, S. A. Lomakina, T. A. Maltseva, and V. A. Serdyuk. "REVIEW AND ANALYSIS OF TECHNOLOGIES OF GRINDING RAW MATERIALS IN INSECT PROCESSING TECHNOLOGIES." In STATE AND DEVELOPMENT PROSPECTS OF AGRIBUSINESS Volume 2. DSTU-Print, 2020. http://dx.doi.org/10.23947/interagro.2020.2.249-252.

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The article provides an overview and analysis of the methods of grinding raw materials of animal feed production. The technology of complex processing of the lion's larva is presented. The feasibility of grinding raw materials in the technology of processing insects is substantiated. The task is to choose the optimal grinding method to obtain the maximum result for the separation of all components of the larva. The most suitable grinding method has been determined. Presents machines for grinding raw materials by cutting.

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Reports on the topic "Larval stage"

1

Greeley Jr, Mark Stephen, Logan R. Elmore, and Kitty McCracken. EVALUATING THE EFFECTS OF FLY ASH EXPOSURE ON FISH EARLY LIFE STAGES: FATHEAD MINNOW EMBRYO-LARVAL TESTS. Office of Scientific and Technical Information (OSTI), May 2012. http://dx.doi.org/10.2172/1045856.

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Stukes, James, Frank Weaver, Bettye Stokes, Nancy O'Connor, and Charlie Barans. Marine Science Initiative at South Carolina State College: An Investigation of the Biosensing Parameters Regulating Bacterial and Larval Attachment on Substrata. Fort Belvoir, VA: Defense Technical Information Center, August 1993. http://dx.doi.org/10.21236/ada268910.

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Burd, B. J., and G. S. Jamieson. Survey of Larval Stages of Commercial Species in the area and Time of the 1988 Seismic Survey in the Queen Charlotte Sound and Hecate Strait. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/131987.

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Bayer, Jennifer M., Michael H. Meeuwig, and James G. Seelye. Identification of Larval Pacific Lampreys (Lampetra Tridentata), River Lampreys (L. Ayresi) and Western Brook Lampreys (L. Richardsoni) and Thermal Requirements of Early Life History Stages of Lampreys : Annual Report 2000. Office of Scientific and Technical Information (OSTI), January 2001. http://dx.doi.org/10.2172/780880.

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Meeuwig, Michael H. Identification of Larval Pacific Lampreys (Lampetra Tridentata), River Lampreys (L. Ayresi) and Western Brook Lampreys (L. Richardsoni) and Thermal Requirements of Early Life History Stages of Lampreys : Annual Report 2001. Office of Scientific and Technical Information (OSTI), January 2002. http://dx.doi.org/10.2172/799143.

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Meeuwig, Michael H. Identification of Larval Pacific Lampreys (Lampetra Tridentata), River Lampreys (L. Ayresi) and Western Brook Lampreys (L. Richardson) and Thermal Requirements of Early Life History Stages of Lampreys : Annual Report 2002. Office of Scientific and Technical Information (OSTI), February 2003. http://dx.doi.org/10.2172/821798.

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Meeuwig, Michael. Identification of Larval Pacific Lampreys (Lampetra tridentata), River Lampreys (L. ayresi), and Western Brook Lampreys (L. richardsoni) and Thermal Requirements of Early Life History Stages of Lampreys, Annual Report 2002-2003. Office of Scientific and Technical Information (OSTI), January 2004. http://dx.doi.org/10.2172/963076.

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