Letteratura scientifica selezionata sul tema "Fishes – Home range"
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Articoli di riviste sul tema "Fishes – Home range"
1
Minns, Charles K. "Allometry of home range size in lake and river fishes". Canadian Journal of Fisheries and Aquatic Sciences 52, n. 7 (1 luglio 1995): 1499–508. http://dx.doi.org/10.1139/f95-144.
Testo completoAbstract (sommario):
A data set assembled from published literature supported the hypotheses that (i) home range size increases allometrically with body size in temperate freshwater fishes, and (ii) fish home ranges are larger in lakes than rivers. The allometric model fitted was home range = A∙(body size)B. Home ranges in lakes were 19–23 times larger than those in rivers. Additional analyses showed that membership in different taxonomic groupings of fish, the presence–absence of piscivory, the method of measuring home range, and the latitude position of the water bodies were not significant predictive factors. Home ranges of freshwater fish were smaller than those of terrestrial mammals, birds, and lizards. Home ranges were larger than area per fish values derived by inverting fish population and assemblage density–size relationships from lakes and rivers and territory–size relationships in stream salmonids. The weight exponent (B) of fish home range was lower than values reported for other vertebrates, 0.58 versus a range of 0.96–1.14. Lake–river home range differences were consistent with differences reported in allometric models of freshwater fish density and production.
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Welsh, J. Q., C. H. R. Goatley e D. R. Bellwood. "The ontogeny of home ranges: evidence from coral reef fishes". Proceedings of the Royal Society B: Biological Sciences 280, n. 1773 (22 dicembre 2013): 20132066. http://dx.doi.org/10.1098/rspb.2013.2066.
Testo completoAbstract (sommario):
The concept of home ranges is fundamental to ecology. Numerous studies have quantified how home ranges scale with body size across taxa. However, these relationships are not always applicable intraspecifically. Here, we describe how the home range of an important group of reef fish, the parrotfishes, scales with body mass. With masses spanning five orders of magnitude, from the early postsettlement stage through to adulthood, we find no evidence of a response to predation risk, dietary shifts or sex change on home range expansion rates. Instead, we document a distinct ontogenetic shift in home range expansion with sexual maturity. Juvenile parrotfishes displayed rapid home range growth until reaching approximately 100–150 mm length. Thereafter, the relationship between home range and mass broke down. This shift reflected changes in colour patterns, social status and reproductive behaviour associated with the transition to adult stages. While there is a clear relationship between body mass and home ranges among adult individuals of different species, it does not appear to be applicable to size changes within species. Ontogenetic changes in parrotfishes do not follow expected mass–area scaling relationships.
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Hill, Jennifer, e Gary D. Grossman. "Home Range Estimates for Three North American Stream Fishes". Copeia 1987, n. 2 (13 maggio 1987): 376. http://dx.doi.org/10.2307/1445773.
Testo completo
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Farmer, Nicholas A., e Jerald S. Ault. "Modeling Coral Reef Fish Home Range Movements in Dry Tortugas, Florida". Scientific World Journal 2014 (2014): 1–14. http://dx.doi.org/10.1155/2014/629791.
Testo completoAbstract (sommario):
Underestimation of reef fish space use may result in marine reserves that are too small to effectively buffer a portion of the stock from fishing mortality. Commonly used statistical home range models, such as minimum convex polygon (MCP) or 95% kernel density (95% KD) methods, require the exclusion of individuals who move beyond the bounds of the tracking study. Spatially explicit individual-based models of fish home range movements parameterized from multiple years of acoustic tracking data were developed for three exploited coral reef fishes (red grouperEpinephelus morio, black grouperMycteroperca bonaci, and mutton snapperLutjanus analis) in Dry Tortugas, Florida. Movements were characterized as a combination of probability of movement, distance moved, and turning angle. Simulations suggested that the limited temporal and geographic scope of most movement studies may underestimate home range size, especially for fish with home range centers near the edges of the array. Simulations provided useful upper bounds for home range size (red grouper:2.28±0.81 km2MCP,3.60±0.89 km2KD; black grouper:2.06±0.84 km2MCP,3.93±1.22 km2KD; mutton snapper:7.72±2.23 km2MCP,6.16±1.11 km2KD). Simulations also suggested that MCP home ranges are more robust to artifacts of passive array acoustic detection patterns than 95% KD methods.
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Eble, Jeff A., Luiz A. Rocha, Matthew T. Craig e Brian W. Bowen. "Not All Larvae Stay Close to Home: Insights into Marine Population Connectivity with a Focus on the Brown Surgeonfish (Acanthurus nigrofuscus)". Journal of Marine Biology 2011 (2011): 1–12. http://dx.doi.org/10.1155/2011/518516.
Testo completoAbstract (sommario):
Recent reports of localized larval recruitment in predominately small-range fishes are countered by studies that show high genetic connectivity across large oceanic distances. This discrepancy may result from the different timescales over which genetic and demographic processes operate or rather may indicate regular long-distance dispersal in some species. Here, we contribute an analysis of mtDNA cytochromebdiversity in the widely distributed Brown Surgeonfish (Acanthurus nigrofuscus;N=560), which revealed significant genetic structure only at the extremes of the range (ΦCT=0.452;P<.001). Collections from Hawaii to the Eastern Indian Ocean comprise one large, undifferentiated population. This pattern of limited genetic subdivision across reefs of the central Indo-Pacific has been observed in a number of large-range reef fishes. Conversely, small-range fishes are often deeply structured over the same area. These findings demonstrate population connectivity differences among species at biogeographic and evolutionary timescales, which likely translates into differences in dispersal ability at ecological and demographic timescales. While interspecific differences in population connectivity complicate the design of management strategies, the integration of multiscale connectivity patterns into marine resource planning will help ensure long-term ecosystem stability by preserving functionally diverse communities.
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Nash, Kirsty L., Justin Q. Welsh, Nicholas A. J. Graham e David R. Bellwood. "Home-range allometry in coral reef fishes: comparison to other vertebrates, methodological issues and management implications". Oecologia 177, n. 1 (26 novembre 2014): 73–83. http://dx.doi.org/10.1007/s00442-014-3152-y.
Testo completo
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Haine, Olivia S., Peter V. Ridd e Richard J. Rowe. "Range of electrosensory detection of prey by Carcharhinus melanopterus and Himantura granulata". Marine and Freshwater Research 52, n. 3 (2001): 291. http://dx.doi.org/10.1071/mf00036.
Testo completoAbstract (sommario):
Elasmobranch fishes have a well developed electrosense that is used for prey detection. Research into the nature of bioelectric cues emitted by prey has, however, been neglected, and consequently the spatial context in which the electrosense operates to detect and home in on prey is not completely understood. This study provided data on both ac and dc electric potentials produced by teleost, crustacean and bivalve prey, as well as measured the decay rates of electric field strength with distance. The electrosensitivity of two tropical elasmobranch species was calculated to be ~4 nV cm–1, from which it was calculated that these predators probably detect their prey at a range of ~0. 25 m.
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Barrett, NS. "Short- and long-term movement patterns of six temperate reef fishes (Families Labridae and Monacanthidae)". Marine and Freshwater Research 46, n. 5 (1995): 853. http://dx.doi.org/10.1071/mf9950853.
Testo completoAbstract (sommario):
Movement patterns were studied on a 1-ha isolated reef surrounding Arch Rock in southern Tasmania. Short-term movements were identified from diver observations, and interpretation of long-term movements involved multiple recaptures of tagged individuals. Visual observations indicated that the sex-changing labrids Notolabrus tetricus, Pictilabrus laticlavius and Pseudolabrus psittaculus were all site-attached, with females having overlapping home ranges and males being territorial. In the non-sex-changing labrid Notolabrus fucicola and in the monacanthids Penicipelta vittiger and Meuschenia australis, there was no evidence of territorial behaviour and 1-h movements were in excess of the scale of the study. The long-term results indicated that all species were permanent reef residents, with most individuals of all species except M. australis always being recaptured within a home range of 100 m × 25 m or less. Only 15% of individuals of M. australis were always recaptured within this range category. The natural habitat boundary of open sand between the Arch Rock reef and adjacent reefs appeared to be an effective deterrent to emigration. The use of natural boundaries should be an important consideration in the design of marine reserves where the aim is to minimize the loss of protected species to adjacent fished areas.
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Crook, David A., Wayne M. Koster, Jed I. Macdonald, Simon J. Nicol, Chris A. Belcher, David R. Dawson, Damien J. O'Mahony, Danny Lovett, Adam Walker e Lucas Bannam. "Catadromous migrations by female tupong (Pseudaphritis urvillii) in coastal streams in Victoria, Australia". Marine and Freshwater Research 61, n. 4 (2010): 474. http://dx.doi.org/10.1071/mf09170.
Testo completoAbstract (sommario):
Understanding migratory requirements is critical for the conservation of diadromous fishes. Tupong (Pseudaphritis urvillii) are diadromous fishes found in freshwater and estuarine regions of south-eastern Australia. Previous studies have hypothesised that mature female tupong undertake downstream spawning migrations from freshwater to the estuary or sea, with a compensatory return of juveniles, and possibly spent fish, back upstream. We applied acoustic telemetry to test this hypothesis. We tagged 55 female tupong in two river systems in Victoria, Australia, and tracked movements for 4- to 6-month periods over 2 years. Thirty-one fish undertook rapid downstream migrations and then appeared to move through the estuary and out to sea between May and August in each year. Migration was associated with relatively high river discharges, and movement from the estuary to the sea tended to occur most frequently during intermediate moon phases. Low rates of movement between September and April suggested that tupong inhabited restricted home ranges outside of the spawning season. The apparently disparate migratory patterns of female (catadromous) and male (non-diadromous) tupong are rare amongst fishes globally. Differential exertion of a range of selective pressures may have resulted in the evolution of sexual differences in migratory modes in this species.
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Bryars, Simon, Paul Rogers, Charlie Huveneers, Nicholas Payne, Ian Smith e Bryan McDonald. "Small home range in southern Australia's largest resident reef fish, the western blue groper (Achoerodus gouldii): implications for adequacy of no-take marine protected areas". Marine and Freshwater Research 63, n. 6 (2012): 552. http://dx.doi.org/10.1071/mf12016.
Testo completoAbstract (sommario):
No-take marine protected areas (MPAs) represent an effective biodiversity conservation tool for a range of species including resident reef fishes that are intrinsically vulnerable to overfishing and other localised impacts. The western blue groper (Achoerodus gouldii) is the largest permanent-resident reef teleost in southern Australian waters and has the second-oldest recorded age of any labrid at 70 years. Acoustic telemetry was used to investigate whether adult A. gouldii can be effectively protected within adequately sized no-take MPAs. Ten passive acoustic receivers tracked the movements of 15 A. gouldii individuals (69–112-cm total length; 7–31-kg weight) at a site off north-western Kangaroo Island, South Australia. Most of the fish displayed high site fidelity (91–100% residence time for 10 of the 11 fish with useful data) for a narrow strip of fringing coastal reef (~1-km length by ~40-m width) throughout a 12-month period. Mean home-range along-shore length and area were estimated at 1076 ± 83 m (s.e.), and 45 188 ± 3497 m2, respectively (n = 11 fish with useful data). Comparison with other resident temperate-reef teleosts indicated no relationship between fish length and home-range area, and that A. gouldii has a relatively small home range. The high site fidelity and small home range of adult A. gouldii individuals makes localised populations amenable to a high level of protection within no-take MPAs.
Tesi sul tema "Fishes – Home range"
1
O'Connell, Bronwyn Anne. "Home range dynamics of spotted grunter, pomadasys commersonnii, in a South African intermittently open estuary". Thesis, Rhodes University, 2008. http://eprints.ru.ac.za/1289/.
Testo completo
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Alós, Crespí Josep. "Selection drivers of life-history traits in marine coastal fishes". Doctoral thesis, Universitat de les Illes Balears, 2013. http://hdl.handle.net/10803/123496.
Testo completoAbstract (sommario):
Humans can induce contemporary evolution through harvesting wild animals. This thesis provides evidence of this process for recreational fishing at surprisingly small geographical scales. Marine fish populations are characterized by high variability in heritable individual life‐history traits which are exposed to biased fishing mortality. The life histories strategies of actual populations, which collectively reduce adult body size, mirror such biased mortality in populations exposed to limited gene flow. Because the relationship between life history and behaviour, it is very likely that fishing also induces adaptive responses in behavioural traits. Due the potential negative effects of fishing selection the productivity and quality of the fishery, this thesis recommend considering the evolutionary impacts of fishing in the management plans of species exploited by the recreational fishingEl humans poden produir evolució contemporània a través de la recol∙lecció de animals salvatges. Aquesta tesis proporciona evidencies d’aquest procés per la pesca recreativa a una sorprenent escala espacial petita. Les poblacions marines de peixos tenen una alta variabilitat individual en caràcters heretables de la història exposada a una mortalitat selectiva per pesca. Les estratègies vitals de les poblacions actuals de peixos costaners, les quals conjuntament produeixin una reducció en la mida del individu, són el reflexa d’aquesta pesca selectiva en poblacions amb baixa connectivitat. Degut a la correlació entre història vital i comportament, la pesca pot induir també respostes adaptatives en cert caràcters comportamentals. Considerant els efectes negatius de la selecció per pesca en la productivitat i la qualitat de les pesqueries, aquesta tesis recomana considerar els possibles efectes evolutius produïts per la pesca en les estratègies de gestió d’espècies explotades per la pesca recreativa.
El hombre puede producir evolución contemporánea por la recolección de animales salvajes. La presente tesis proporciona evidencias de este proceso por la pesca recreativa en una sorprendente escala espacial pequeña. Las poblaciones de peces marinos presentan una alta variabilidad en caracteres heredables de la historia vital expuesta a mortalidad selectiva por pesca. Las estrategias vitales de las poblaciones actuales de los peces costeros, las cuales conjuntamente producen una reducción en el tamaño del individuo, son el reflejo de esta mortalidad selectiva en poblaciones con baja conectividad. Debido a la relación entre historia vital y comportamiento, la pesca puede también inducir cambios adaptativos en ciertos rasgos de comportamiento. Considerando los efectos negativos de la selección por pesca en al productividad y calidad de la pesquería, esta tesis recomienda considerara los posibles efectos evolutivos inducidos por la pesca en la estrategias de gestión de especies explotadas por la pesca recreativa.
3
Kordosky, Jennifer R. "Landscape of Stress: Does Drought Prevail Over Anthropogenic Activity in Influencing Cortisol Levels and Fitness in the Pacific Fisher?" DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7439.
Testo completoAbstract (sommario):
Fishers (Pekania pennanti) are a species of concern in the Sierra Nevada Mountains of California. Cortisol is a glucocorticoid hormone released to mobilize energy in response to stress and has been used as an indication of an individual’s physiological response to its environment. By collecting samples of fisher hair and measuring an individual’s cortisol, we examined the physiological stress response of the animals to human disturbances (housing density, road density, habitat type, and silvicultural treatements) and drought (tree mortality) in their home ranges. Using AICc model selection, we found that levels of tree mortality within a fisher’s home range significantly influenced cortisol levels. Various human disturbances had a smaller effect on cortisol levels. Furthermore, we examined the relationship between cortisol and fitness through the metrics of body condition, female kit counts, and survival. We found that females with low cortisol had significantly higher survival rates than females with medium and high cortisol. With the recent drought, bark beetle infestation and subsequent tree mortality being >80% in some areas of our study, cortisol levels could continue to increase, potentially leading to further decreased fitness within this fisher population. We also examined the difference in habitat selection between the core and entirety of the home ranges and found that fishers prefer late-successional forest in the core of their home ranges.
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Koen, Erin Leanne. "Home range, population density, habitat preference, and survival of fishers (Martes pennanti) in eastern Ontario". Thesis, University of Ottawa (Canada), 2006. http://hdl.handle.net/10393/27145.
Testo completoAbstract (sommario):
By the 1940s, fishers (Mustelidae, Martes pennanti) were extirpated in Ontario south of the French and Mattawa Rivers, probably as a result of overharvesting and habitat loss. However, during the last several decades fishers have recolonized much of their former range in Ontario. This recolonization, combined with (for the most part) conservative harvest management, has led to increases in abundance. Perhaps inevitably, these increases have resulted in requests by fur harvesters to increase fisher quotas. The question then arises as to what the effect of the current quota system is on fisher populations in eastern Ontario. Unfortunately, very little is known about fisher demographics in eastern Ontario; as a result, the current management system is based almost exclusively on information and data on well-studied fisher populations from other regions, notably Algonquin Park. The extent to which these data---and the inferences regarding effective management therefrom---reflect fisher population characteristics in eastern Ontario is unknown.
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Nyboer, Elizabeth. "Movement, home range, and ecological divergence in the commercially fished Nile perch in Lake Nabugabo, Uganda". Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114515.
Testo completoAbstract (sommario):
The large piscivorous Nile perch (Lates niloticus) was introduced to the Lake Victoria basin in the 1950s and 1960s and eventually became one of the most valuable commercial species of East Africa's inland fisheries. Intense fishing-induced mortality may be contributing to dramatic ecological change in this species (reductions in body size and biomass; shifts in distribution and diet), and reinforcing patterns of ecological divergence in some lakes in the region. In this thesis I use an evolutionary ecology approach to explore habitat associated ecological divergence in the Nile perch in Lake Nabugabo, Uganda. I describe home range, movement, and habitat selection of Nile perch, and quantify divergence in phenotypic traits between major habitat types and across Nile perch ontogeny. Using radio telemetry I tracked 14 Nile perch for 5 months and used ArcGIS 9.3 to quantify movement patterns throughout Lake Nabugabo. I used movement data in combination with detailed ecological information to quantify habitat selection in the heavily fished inshore zones of the lake. Geometric morphometric and colour analyses were used to quantify divergence in body shape and skin colour across different size classes of Nile perch from ecologically distinct wetland and forest edge habitats. Nile perch exhibited low levels of daily movement and relatively small home ranges; and they preferred regions of the lake characterized by low temperature and high dissolved oxygen. Geometric morphometric and colour analyses revealed habitat-associated phenotypic divergence in both skin colour and body shape, although not all trends were consistent across size classes. The source of phenotypic divergence (genetic vs. plastic) remains unknown; however the level of site tenacity exhibited by Nile perch suggests that ecological isolation between forest edge and wetland fish may be higher than expected. These results have important implications for development of territorial jurisdiction by Beach Management Units, the decentralized structure of fisheries management in the region. Knowing that Nile perch, one of the most important commercial catches in the Lake Victoria basin, have definable home ranges provides a biologically relevant rationale for the insertion of territorial boundaries for BMUs. Clearly defined resource-use boundaries may provide additional incentives for members to follow fishery rules and may prove to be instrumental in improving BMU efficacy.La grande perche du Nile piscivore (Lates Niloticus) a été introduite dans le bassin du lac Victoria dans les années cinquantes et soixantes pour devenir une des espèces les plus précieuses pour l'économie de la pêche en intérieure de l'Afrique de l'est. Un taux de mortalité très élevé relié à la pêche contribuerait à des changements écologiques dramatiques pour l'espèce (réduction de la taille du corps et de la biomasse; changements dans la distribution et le régime alimentaire), et renforcerait les conventions de divergence écologique dans certains lacs de la région. Dans cette thèse, j'utilise une approche écologique évolutive pour explorer l'écosystème associé à la divergence écologique de la perche du Nile dans le lac Nabugabo en Uganda. J'identifie le domaine vital, les schémas de mouvement et l'utilisation de l'habitat de la perche du Nile, et quantifie ainsi la divergence des phénotypes dans les différents habitats et toute l'ontogenèse de la perche du Nile. En utilisant la technique de la radiotélémesure, j'ai traqué 14 perches du Nile pendant 5 mois et avec l'ArcGIS 9.3, j'ai quantifié les schémas de mouvements dans le lac Nabugabo. J'ai associé les données des schémas de mouvement avec des données écologiques détaillées pour quantifier l'utilisation de l'habitat dans les zones de pêche intense du lac. La géométrie morphométrique et les analyses de couleur ont été utilisées pour quantifier les divergences dans la taille, forme et couleur des différentes classes de perche du Nile dans les habitats distincts de bord de forêts et de marécages. La perche du Nile a démontré des niveaux de mouvements journaliers peu élevés pour un domaine vital plutôt restreint; Elle préférait les régions du lac de basse température à oxygène hautement dissous. La géométrie morphométrique et les analyses de couleur ont révélé des divergences phénotypiques associées à l'écosystème dans la forme et la couleur de la perche, bien que ces tendances n'aient pas été constantes à travers toutes les classes de tailles. La source de la divergence phénotypique (génétique contre plastique) demeure inconnue; par contre, le niveau de ténacité au choix du site manifesté par la perche du Nile suggère que l'isolation écologique entre le bord de forêt et les marécages serait plus élevé que prévu. Ces résultats ont des implications importantes pour le développement d'une juridiction territoriale dans les Unités de Gestion des Plages (UPG), la structure décentralisée qui gère la pêche dans la région. Sachant que la perche du Nile, une des plus espèces les plus importantes pour la pêche commerciale dans le bassin du lac Victoria, démontre des domaines vitaux définissables fournit une raison biologique pour favoriser des délimitations territoriales de pêche par les UGP. Ces délimitations de ressources clairement définies pourraient motiver les membres des UPG à suivre le règlement des consignes de pêche et devenir essentiel pour améliorer l'efficacité des UGP.
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Hunter, Ryan Wayne Maceina Michael J. "Movement, dispersal, and home ranges of tournament displaced largemouth and spotted bass in Lake Martin, Alabama". Auburn, Ala., 2006. http://repo.lib.auburn.edu/EtdRoot/2006/FALL/Fisheries_and_Allied_Aquacultures/Thesis/HUNTER_RYAN_39.pdf.
Testo completo
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Peres, Pedro Henrique de Faria. "Uso do espaço pelo veado-catingueiro (Mazama gouazoubira; Fisher, 1814): uma comparação entre colares GPS e DNA fecal". Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/91/91131/tde-28092015-113818/.
Testo completoAbstract (sommario):
Informações sobre o uso do espaço são importantes para o entendimento de processos ecológicos que envolvem uma espécie e a determinação de seu estado de conservação. Tais informações são escassas para o gênero Mazama, o mais diverso entre os cervídeos neotropicais, sendo que desenvolver metodologias para obtenção de dados ecológicos do gênero torna-se fundamental para qualquer ação de manejo envolvendo o grupo. O estudo do DNA fecal surge como uma ferramenta importante para viabilizar a coleta sistemática de informações sobre o gênero. Assim, o presente trabalho visou a estimar a área de vida e a seleção de hábitat do veado-catingueiro, comparando duas metodologias, com intuito de avaliar a aplicação do DNA fecal como alternativa para se estudar a espécie. O trabalho contou com 6 animais que tiveram suas localizações obtidas a cada 13 horas por colares GPS, no período de um ano. Nesse mesmo período e na mesma área, foram coletadas mensalmente amostras fecais, gerando um total de 830 amostras, cujo DNA foi extraído para identificação genética. A espécie das amostras foi determinada com o uso de um marcador mitocondrial (cit-b), e a identificação individual, com um painel de 11 microssatélites. Os valores de área de vida pelo método do MPC 95% variaram de 33 ha a 97 ha, e pelo método Kernel com 95% das localizações, variaram de 17 ha a 77 ha. Observou-se que as áreas de vida são alocadas nos diferentes habitats da região conforme o disponível (p = 0,072), porém são utilizadas internamente de forma selecionada (p=0,001). Neste nível, a espécie apresentou preferência pelos hábitats de cerrado e campo cerrado e evitou o campo (p < 0,005). Foram identificadas 670 amostras de veado-catingueiro e 15 genótipos únicos. A análise espacial das fezes também sugeriu uso desproporcional dos hábitats em relação à sua disponibilidade, sendo que a comparação direta entre os dois métodos revelou iguais distribuições no nível de espécie (p=0,178). As amostras individualizadas sugeriram um padrão de alta sobreposição de área de uso por diferentes indivíduos, mas avanços são necessários para melhor elucidar a questão. Perante os resultados observados, entende-se que há muito em se avançar na análise molecular das fezes que, realizada em larga escala, pode fornecer respostas importantes anteriormente inviáveis para espécies florestais.Space use information is a key element to understand the ecological processes regarding a species and its conservation status. Such information is scarce for the genus Mazama, the most diverse group among Neotropical deer. The development of methods to obtain ecological data is fundamental to management actions concerning the group. The study of fecal DNA emerges as an important tool to enable systematic information collection about Mazama genus. Therefore, the present study aimed to estimate the home range and habitat selection of brown brocket deer comparing two methodologies in order to assess the application of fecal DNA as an alternative to study this species. Six animals were monitored with GPS collars and their location data was collected every 13 hours within one year time. Fecal samples were collected monthly in the same period and in the same area, generating a total of 830 samples whose DNA was extracted for genetic identification. The species identification was determined by a mitochondrial marker (cit-b) and individuals were identified applying a panel of 11 microsatellites. Home range was 33-97 h by MPC 95% and 17-77 h by Kernel 95%. Home rages are allocated in different habitats as available in the region (p = 0.072), but its use is internally selected (p = 0.001). At this level, the species showed preference for \"cerrado\" and \"campo cerrado\" habitats and avoidance to open field areas (p < 0.005). Genetics analysis identified 670 brown brocket deer samples and 15 unique genotypes. Feces spatial analysis suggested disproportionate use of habitats in relation to their availability in the field and the direct comparison between the two methods revealed equal distributions at the species level (p = 0.178). The genotyped samples suggested an overlapping home range pattern for different individuals, but advances are needed to further elucidate the issue. There is need for improvements in feces molecular analysis and, if held on large scale, it can provide important and previously unviable answers for forest species.
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Sousa, Dárcio Filipe Jacob de. "Padrões de deslocação e actividade diária do barbo-comum (Barbus bocagei, Steindachner 1865), num curso de água Mediterrânico de tipo intermitente". Master's thesis, Universidade de Évora, 2010. http://hdl.handle.net/10174/20794.
Testo completoAbstract (sommario):
Treze indivíduos da espécie Barbus bocagei (Steindachner 1865) foram marcados com transmissores de rádio, implantados cirurgicamente, e monitorizados num troço da rede hídrica da ribeira de Valverde (Bacia Hidrográfica do rio Sado, Portugal), entre 12 de Março e 8 de Agosto, de 2009, com o objectivo de estudar os padrões de movimento e actividade desta espécie. A monitorização foi efectuada por telemetria baseada na técnica de "homing" a partir das margens, tendo-se realizado ciclos de localizações diárias e ao longo de 24 horas. Durante o período de estudo, os barbos monitorizados apresentaram um home range entre 0.5 e 3,2 km ocupando tanto troços da ribeira como a albufeira da Tourega. As áreas vitais ocupadas na ribeira foram superiores às ocupadas na albufeira. Entre Março e o início de Abril apresentaram grande mobilidade, ocupando as zonas mais a montante da área de estudo, onde se observa maior disponibilidade de habitats reófilos, com potencial reprodutivo. De forma geral, verificou-se um decréscimo da área vital e dispersão dos barbos ao longo do período de estudo, associado à diminuição da profundidade e velocidade da corrente do curso de água. No final de Maio os indivíduos migraram para a albufeira, onde permaneceram durante o Verão. Relativamente à actividade diária, os resultados demonstraram que, os períodos de maior actividade dos barbos ocorrem ao amanhecer e ao anoitecer. Nos períodos de menor actividade, os indivíduos ocorreram em habitats menos profundos mas com elevada percentagem de refúgios. Os resultados mostram que a disponibilidade de água na ribeira influencia fortemente a dispersão dos barbos e que a albufeira assume um papel determinante como refúgio estival para a espécie. Levanta-se, ainda, a hipótese que a presença de lontra (Lutra lutra) na área de estudo seja um factor determinante no padrão de comportamento dos barbos, devido às condições de habitat enquadrarem uma forte interação presa-predador. Os barbos apresentaram grandes áreas vitais e elevada dispersão na área de estudo enfatizando a necessidade de se desenvolver uma estratégia de conservação da espécie à escala da bacia hidrográfica, com particular atenção a cenários onde se verificam constrangimentos à deslocação dos indivíduos. - ABSTRACT: Thirteen individuals of Barbus bocagei (Steindachner 1865) were tagged with radio transmitters surgically implanted and tracked in Valverde stream (Sado River Basin, Portugal) between March 12th and August 8th of 2009, to study their movement and activity patterns. The monitoring was carried out by telemetry, using homing technique from the banks, on daily fish locations basis and on several 24 hour cycles. The barbel's home-range ranged from 0.5 to 3.2 km, occurring both the stream sector and the reservoir during the study period. Home-range occupied within the stream was higher than those occupied in the reservoir. Between March and early April, barbels showed great mobility, using the areas further upstream of the study area, with higher availability of reophilic habitats, suitable for spawning. Barbels home-range and dispersal decreased with stream water depth and current velocity which occurred, along the study period. ln late May the individuals migrated to the reservoir, where they remained during the summer. The results showed that, in general, the periods of higher activity of fish are observed at dawn and dusk. During the resting periods, barbels tend to use shallower habitats but with percentages of refuges. The results point out the importance of the reservoir as summer refugia for barbels that the water availability in the stream strongly influences the dispersion of fish. The pattern of barbel's movements and activity seems to be strongly influenced by the presence of otter (Lutra lutra) in the study area as habitat features promotes a strong prey-predator interaction. Barbels present large home-ranges and high dispersal movements along the river network which emphasize the requirement of a Fish Conservation Strategy at the river basin scale.
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Salinas-Akhmadeeva, Irene Antonina. "Fish Movement in the Red Sea and Implications for Marine Protected Area Design". Thesis, 2021. http://hdl.handle.net/10754/669036.
Testo completoAbstract (sommario):
The Red Sea is valued for its biodiversity and the livelihoods it provides for many. It now faces overfishing, habitat degradation, and anthropogenic induced climate-change. Marine Protected Areas (MPAs) became a powerful management tool to protect vulnerable species and ecosystems, re-establish their balance, and enhance marine populations. For this, they need to be well designed and managed. There are 15 designated MPAs in the Red Sea but their level of enforcement is unclear. To design an MPA it is necessary to know if it will protect species of interest by considering their movement needs. In this thesis I aim at understanding fish movement in the Red Sea, specifically home range (HR) to inform MPA size designation. With not much empirical data available on HR for Red Sea fish, I used a Machine Learning (ML) classification model, trained with empirical literature HR measurements with Maximum Total Length (L Max), Aspect Ratio (AR) of the caudal fin, and Trophic Level as predictor variables. HR was classified into 5 categories: <.1 km, 0.1- 1.0 km, 2.0- 5.0 km, 5.0- 20 km, and >20 km. The model presents a 74.5% degree of accuracy. With it, I obtained the HR category for 337 Red Sea fish species. Having MPAs with a maximum linear dimension of at least 10km will meet the requirements of 90% of fish species evaluated in the model, which were small to medium size families (damselfishes, butterflyfishes, small wrasses, cardinalfishes, gobies and blennies). This percentage does not include larger species likely to move over much greater distances (10s, 100s or 1000s of km) (e.g., medium to large jacks, snappers,, groupers, sharks and rays). 60% of the Red Seas designated MPAs have the potential, if enforced as a No Take Area (NTA), to benefit more than 95% of reef fishes. However, larger MPAs will be required to protect more wide-ranging species. TRSP project in Al Wadj is proposing to close the entire SEZ to fishing. If they are successful in implementing and enforcing this fishing ban, TRSP will be the largest no take area in the Red Sea (~160 km long) that is likely to not only protect all of the species evaluated in the model, but also most wide-ranging species. Therefore, TRSP is not only likely to achieve and surpass its stated goal of increasing current fish biomass by 30%, but also to provide benefits to surrounding areas through the spillover of adults, juvenile and larvae to fished areas.
Capitoli di libri sul tema "Fishes – Home range"
1
Bolden, Stephania K. "Using Ultrasonic Telemetry to Determine Home Range of a Coral-Reef Fish". In Reviews: Methods and Technologies in Fish Biology and Fisheries, 167–88. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-017-1402-0_8.
Testo completo
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"Community Ecology of Stream Fishes: Concepts, Approaches, and Techniques". In Community Ecology of Stream Fishes: Concepts, Approaches, and Techniques, a cura di Gordon H. Copp, Saulius Stakėnas e Julien Cucherousset. American Fisheries Society, 2010. http://dx.doi.org/10.47886/9781934874141.ch17.
Testo completoAbstract (sommario):
<em>Abstract</em>.—The pumpkinseed <em>Lepomis gibbosus </em>was introduced to Europe, including England, more than 100 years ago, but relatively little is known of its potential ecological impacts on native species and ecosystems. In England, the pumpkinseed is currently established in ponds of the River Ouse (Sussex) and its flood plain. Escapee pumpkinseeds are found in some small tributaries that contain native species of conservation interest (brown trout <em>Salmo trutta</em>, brook lamprey <em>Lampetra planeri</em>, European eel <em>Anguilla anguilla</em>, European bullhead <em>Cottus gobio</em>). We used using electrofishing surveys and telemetry methods to examine the interactions between pumpkinseeds and native stream fishes (mainly brown trout), including predator–prey relationships, home range size, microhabitat preferences, home range fidelity, and habitat overlap/repartition. To assess impacts of pumpkinseed on stream food webs, a preliminary study quantified trout growth and food-web structure of a stream ecosystem (abundance of primary and secondary producers, fish, and riparian spiders) in reaches with and without pumpkinseed. Where pumpkinseeds were in high density, differences were observed in stream food-web structure, in proportional representation of fish species traits and in riparian spider community composition, but these differences cannot be attributed solely to pumpkinseed presence. From the available evidence, there appears to be little direct or indirect adverse impact of pumpkinseed on native species and the stream ecosystem when in low densities, including as a host of nonnative infectious agents. However, this could change under conditions of climate warming, which are likely to favor pumpkinseed reproduction, potentially to the detriment of native species. In a context in which freshwater ecosystems are impacted by several human and climate-induced factors acting synergistically, our results underline the need to study nonnative species impacts through a series of experimental and long-term studies of stream ecosystems.
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"Advances in Fish Tagging and Marking Technology". In Advances in Fish Tagging and Marking Technology, a cura di Anne-May Ilestad, T. hrond O. Haugen e Jonathan E. Colman. American Fisheries Society, 2012. http://dx.doi.org/10.47886/9781934874271.ch18.
Testo completoAbstract (sommario):
<i>Abstract</i>.—Environmental variables and interspecific interactions influence fishes’ habitat use. The eurythermic and euryhaline European sea bass <i>Dicentrarchus labrax </i>is increasing in Norwegian waters. We compare diel- and seasonal habitat use and home ranges of this species with Atlantic cod <i>Gadus morhua </i>in the Oslo-fjord, Norway. Individual depth and horizontal positions were obtained using acoustic telemetry. Fish were tracked using both portable and stationary receivers. Both species displayed high site fidelity from June to October. In late October, the sea bass migrated out of the core area whereas the cod remained. Cod home ranges (11.4 ± 5.5 ha) were smaller than sea bass home ranges (42.6 ± 26.1 ha) throughout the study. Home range increased with individual body size in sea bass, but not cod. The two species had differential diel- and seasonal depth use. Sea bass used depths shallower than 4 m during June through September, with diel vertical migrations rarely exceeding 2 m. After September, sea bass sought deeper waters; stabilizing at 11 m in November with a diel migration amplitude of 7 m. Cod stayed deeper than the 9–10 m thermocline in August with vertical migration amplitude of 7 m and moved into daytime depths of 6.5 m with diel amplitude of 4.5 m in December. Sea bass actively selected warmer temperatures and the lowest salinities available, whereas cod avoided temperatures higher than 13°C and salinities below 24 ppt. The differential temperature preference for these species is likely the main driver for the differential depth utilization. A model using air temperatures as a predictor was constructed predicting daytime and night-time depth use. This study provides novel insights to the habitat use of the two species under Nordic fjord conditions—information to be included in upcoming management programs emerging due to the continuing northward colonization of sea bass along the Norwegian coast.
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"Advances in Fish Tagging and Marking Technology". In Advances in Fish Tagging and Marking Technology, a cura di Michelle R. Heupel e Dale M. Webber. American Fisheries Society, 2012. http://dx.doi.org/10.47886/9781934874271.ch15.
Testo completoAbstract (sommario):
<i>Abstract</i>.—Acoustic tracking of fishes has been conducted for several decades, but within the last 20 years technology has advanced greatly and many researchers have shifted to long-term (multi-year) passive monitoring studies as opposed to active tracking. The number of publications produced using this approach has varied over the last 20 years with dramatic increases in publications using passive telemetry data since the late 1990s. Passive monitoring has been used to address a wide array of topics including behaviorally focused research into home range analysis and presence patterns, physiological studies and technical uses of equipment or methodology. Studies have included over 80 different species including invertebrates, teleost and chondrichthyan fishes, marine reptiles and marine mammals. Research has been conducted in marine, estuarine, and freshwater systems with varying habitats and substrate. This diverse set of studies represents a wide array of research applications and uses of this technology. This text examines the use of acoustic technology and passive acoustic arrays to define where the technology began, describe past advances and comments on the future use of this technology in marine and aquatic ecology.
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"Community Ecology of Stream Fishes: Concepts, Approaches, and Techniques". In Community Ecology of Stream Fishes: Concepts, Approaches, and Techniques, a cura di Marco A. Rodríguez. American Fisheries Society, 2010. http://dx.doi.org/10.47886/9781934874141.ch12.
Testo completoAbstract (sommario):
<em>Abstract</em>.—Long-distance dispersal (LDD; relatively infrequent displacements occupying the tails of the dispersal kernel) and habitat connectivity (the degree to which the landscape facilitates or impedes movement among resource patches) influence many important ecological processes. These processes include population spread and redistribution, regulation of local and regional population dynamics, colonization of newly available habitats, maintenance of diversity in variable environments, and transfer of energy and nutrients. Field studies have shown that both LDD and instream barriers can have marked effects on the distribution patterns and demographic isolation of stream fishes at various spatial scales. Traditional summary measures of spatial use at the individual level, such as home ranges, have limited utility for examining the effects of connectivity in the presence of LDD or instream barriers; however, simple models can be tailored to extract and synthesize this information efficiently. This study presents a modeling framework for quantifying LDD of marked fish as well as their movements in the presence of barriers of differing porosity or permeability. Simulations are used to illustrate the feasibility of the modeling approach and explore sample size and spatial scale requirements. Comparison of model parameters across systems, species, and time periods should provide insights into the contribution of movement to structuring fish communities in riverine landscapes. The proposed framework can help improve on methods currently used (e.g., to quantify characteristic scales of habitat use by using median displacements or other appropriate percentile measures instead of home ranges and to relate fish movements to environmental or individual predictors by robust analyses based on heavy-tailed rather than simple normal distributions).
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"Anadromous Sturgeons: Habitats, Threats, and Management". In Anadromous Sturgeons: Habitats, Threats, and Management, a cura di Daniel Hatin, Jean Munro, François Caron e Rachel D. Simons. American Fisheries Society, 2007. http://dx.doi.org/10.47886/9781888569919.ch7.
Testo completoAbstract (sommario):
<em>Abstract</em>.—Space use and habitat selection of early juvenile Atlantic sturgeon <em>Acipenser oxyrinchus</em> have been little studied and remain largely unknown throughout the species’ range. In 2000–2002, survey trawling, ultrasonic telemetry, benthos sampling, and hydrodynamic modeling were used to determine the summer movement patterns, home range size, and habitat use and selection of early juvenile Atlantic sturgeon in the St. Lawrence estuary. Sonic-tagged Atlantic sturgeon, assumed to be age 2 based on their size, used a global area estimated at 76 km2 that included two main core areas. Individual summer home range sizes varied from 1 to 8 km2, but core areas were generally smaller than 1 km2. The mean daily distance traveled ranged from 0.4 to 13.5 km/d and was significantly related to sturgeon size. Fish were located mostly in freshwater relatively close to the salt wedge boundary and far from the shore, intertidal zones, and islands. They mostly used the 6–10-m depth range relatively close to a channel, in areas with low bottom current velocities, and over silt–clay substrates. Salinity and distance from the salt wedge were the two most important variables explaining their habitat selection. Age-0 Atlantic sturgeon used similar depth ranges, bottom salinities, and current velocities, but occupied mainly sandy substrate. Management implications of these results are discussed in relation to the impact of dredging and sediment disposal operations in the St. Lawrence estuary.
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"Challenges for Diadromous Fishes in a Dynamic Global Environment". In Challenges for Diadromous Fishes in a Dynamic Global Environment, a cura di Thomas M. Grothues, Kenneth W. Able, Jacque Carter e Timothy W. Arienti. American Fisheries Society, 2009. http://dx.doi.org/10.47886/9781934874080.ch9.
Testo completoAbstract (sommario):
<em>Abstract</em>.-Telemetered adult striped bass <em>Morone saxatilis </em>(<em>n </em>= 170) in two small nonnatal U.S. Atlantic coast estuaries, the Mullica River-Great Bay in New Jersey and the Saco River in Maine, displayed a variety of movements relative to migration and habitat use. Individual presence in both systems ranged from hours to many months from spring through fall but seldom during the winter. Some made upriver runs during the presumed spawning season. An absence of eggs, larvae, or juvenile stage striped bass or suitable spawning grounds suggests that fish utilizing both systems are members of migrant contingents originating elsewhere. In both systems, some seasonal residents occupied individual "home" ranges throughout the salinity gradient, but others were plastic in their behavior and utilized several sites or visited the estuary either briefly or for a whole season in different years. Movement of fish between study sites and recaptures away from them indicated wide dispersal during time away from the study estuaries. The above supports the idea that migratory and seasonal residence behaviors of migrant striped bass are not compulsive or predictive but reactive or learned. Despite long seasonal occurrence in these small estuaries by some individuals, none appeared to become full-time residents. Small estuaries may lack the year-round resources for spawning and feeding to enable this. However, the observed behaviors could promote recolonization of spawning stocks with residents in larger restored rivers and estuaries where they have been previously extirpated. Localized fishery depletion of small estuaries could occur quickly but would be temporary in the absence of stock wide depletion.
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"Landscape Influences on Stream Habitats and Biological Assemblages". In Landscape Influences on Stream Habitats and Biological Assemblages, a cura di Paul W. Seelbach, Michael J. Wiley, Matthew E. Baker e Kevin E. Wehrly. American Fisheries Society, 2006. http://dx.doi.org/10.47886/9781888569766.ch2.
Testo completoAbstract (sommario):
<em>Abstract.</em>—–Describing the unique spatial context of any river unit requires integrating catchment and local valley characters. We believe that adding hydrologic regime and key fish species to standard geomorphic variables improves the delineation and characterization of river valley segments as ecological units. Valley segments constrain habitat units, and several segments together can encompass home ranges of mobile fishes. Segments can be accurately defined and characterized using maps and then analyzed across large geographic areas, making them practical for statewide planning and management. By incorporating prior knowledge from modeling landscape–river relationships, we interpreted multiple landscape maps to delineate and assign initial attributes to river valley segments. The resulting classification system provides a new, ecologically informed view of Michigan’s rivers that has helped managers better perceive and consider environmental patterns that constrain habitat and biological variation within and among individual rivers. It is being used throughout Michigan and regionally as a framework for fisheries and water management, conservation planning, and education.
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"Extraction of Parameters from Observations, Emergence of Home Ranges, and Applicability of the Fisher Equation for Bacteria". In Theory of the Spread of Epidemics and Movement Ecology of Animals, 98–125. Cambridge University Press, 2021. http://dx.doi.org/10.1017/9781108882279.008.
Testo completo
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"Burbot: Ecology, Management, and Culture". In Burbot: Ecology, Management, and Culture, a cura di James L. Dunnigan e Cameron L. Sinclair. American Fisheries Society, 2008. http://dx.doi.org/10.47886/9781888569988.ch3.
Testo completoAbstract (sommario):
Abstract.—Adult burbot <em>Lota lota </em>from Koocanusa Reservoir, Montana, USA were surgically implanted with acoustic (<em>n </em>= 28) and combined radio/acoustic tags (<em>n </em>= 12) to quantify movements and home range. Fish were tagged from November 2003 to April 2004, and tracking efforts were conducted approximately weekly during daylight hours on Koocanusa Reservoir using a motor boat during the period of mid-December 2003 to July 2005, which spanned two burbot spawning seasons. Six (15%) tagged burbot were never relocated after release, and an additional seven (17.5%) of the tagged burbot either died or shed their tag within 60 d after release. We relocated 34 marked burbot (85%) on at least three occasions (mean = 10.0). Burbot frequently used the deepest portions of the reservoir, especially during the summer months. We estimated that the mean 50%, 75%, and 90% kernel home ranges were 14.6, 22.6 and 32.3 km<sup>2</sup>, respectively. We found no evidence that burbot home range differed within the 2 years of this study. Although we did observe burbot moving a maximum distance of up to 64.3 km, we were unable to discern any general movement patterns by month or capture location. Individual burbot tagged in this study had relatively high fidelity to the original capture side of the reservoir, and almost half of our marked burbot were never relocated on the opposite side of the remnant Kootenai River thalweg, and those that did cross the thalweg do so infrequently. One burbot was entrained through Libby Dam approximately 134–276 d after capture and tagging.
Rapporti di organizzazioni sul tema "Fishes – Home range"
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Hostetler, Steven, Cathy Whitlock, Bryan Shuman, David Liefert, Charles Wolf Drimal e Scott Bischke. Greater Yellowstone climate assessment: past, present, and future climate change in greater Yellowstone watersheds. Montana State University, giugno 2021. http://dx.doi.org/10.15788/gyca2021.
Testo completoAbstract (sommario):
The Greater Yellowstone Area (GYA) is one of the last remaining large and nearly intact temperate ecosystems on Earth (Reese 1984; NPSa undated). GYA was originally defined in the 1970s as the Greater Yellowstone Ecosystem, which encompassed the minimum range of the grizzly bear (Schullery 1992). The boundary was enlarged through time and now includes about 22 million acres (8.9 million ha) in northwestern Wyoming, south central Montana, and eastern Idaho. Two national parks, five national forests, three wildlife refuges, 20 counties, and state and private lands lie within the GYA boundary. GYA also includes the Wind River Indian Reservation, but the region is the historical home to several Tribal Nations. Federal lands managed by the US Forest Service, the National Park Service, the Bureau of Land Management, and the US Fish and Wildlife Service amount to about 64% (15.5 million acres [6.27 million ha] or 24,200 square miles [62,700 km2]) of the land within the GYA. The federal lands and their associated wildlife, geologic wonders, and recreational opportunities are considered the GYA’s most valuable economic asset. GYA, and especially the national parks, have long been a place for important scientific discoveries, an inspiration for creativity, and an important national and international stage for fundamental discussions about the interactions of humans and nature (e.g., Keiter and Boyce 1991; Pritchard 1999; Schullery 2004; Quammen 2016). Yellowstone National Park, established in 1872 as the world’s first national park, is the heart of the GYA. Grand Teton National Park, created in 1929 and expanded to its present size in 1950, is located south of Yellowstone National Park1 and is dominated by the rugged Teton Range rising from the valley of Jackson Hole. The Gallatin-Custer, Shoshone, Bridger-Teton, Caribou-Targhee, and Beaverhead-Deerlodge national forests encircle the two national parks and include the highest mountain ranges in the region. The National Elk Refuge, Red Rock Lakes National Wildlife Refuge, and Grays Lake National Wildlife Refuge also lie within GYA.