Fish Assemblages
Mostrando 1-12 de 96 artigos, teses e dissertações.
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1. Seasonal and longitudinal variation in fish assemblage structure along an unregulated stretch of the Middle Uruguay River
RESUMO Os padrões de diversidade e suas causas continuam sendo questões importantes, especialmente em ecossistemas que preservam condições naturais. Este é o caso da diversidade de peixes em grandes rios neotropicais. Neste contexto, investigamos padrões de diversidade de peixes ao longo de um extenso gradiente fluvial (ca. 450 km) no médio rio Urugua
Neotrop. ichthyol.. Publicado em: 02/12/2019
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2. Historical biogeography of fishes from coastal basins of Maranhão State, northeastern Brazil
RESUMO A ictiofauna da Amazônia é uma das mais diversificadas do mundo, mas os peixes das bacias costeiras adjacentes do estado do Maranhão, no Nordeste do Brasil, ainda são pouco conhecidos. Utilizamos métodos filogeográficos, filogenia de comunidade e de diversidade beta filogenética para estudar a história biogeográfica de peixes das bacias coste
Neotrop. ichthyol.. Publicado em: 19/06/2019
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3. Organization of fish assemblages in blackwater Atlantic Forest streams
RESUMO O objetivo do estudo foi testar se espécies de peixes ocupam diferentes mesohabitats definidos por critérios específicos de tipos de substrato em riachos de águas pretas de Mata Atlântica. Durante a estação de baixa vazão (junho-setembro/2016), foram amostrados quatorze riachos costeiros de águas pretas no litoral de São Paulo, Brasil. Para
Neotrop. ichthyol.. Publicado em: 29/04/2019
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4. Optimal fishing samplers to reveal the morphological structure of a fish assemblage in a subtropical tidal flat
RESUMO Os caracteres morfológicos das espécies são essenciais para avaliar a estrutura funcional de uma assembleia de peixes, uma vez que as diferenças entre elas são indicativas de distintas características ecológicas. De forma geral, as planícies de maré são importantes para assembleias de peixes por oferecerem áreas para alimentação, refúgio
Neotrop. ichthyol.. Publicado em: 11/03/2019
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5. Large-Scale Spatial and Temporal Variability of Larval Fish Assemblages in the Tropical Atlantic Ocean
Abstract This study investigated the large-scale spatial and temporal variability of larval fish assemblages in the west tropical Atlantic Ocean. The sampling was performed during four expeditions. Identification resulted in 100 taxa (64 families, 19 orders and 17 suborders). During the four periods, 80% of the total larvae taken represented eight characteri
An. Acad. Bras. Ciênc.. Publicado em: 14/02/2019
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6. Effects of deforestation on headwater stream fish assemblages in the Upper Xingu River Basin, Southeastern Amazonia
RESUMO A expansão da fronteira agrícola amazônica representa a mais ampla mudança na cobertura e uso da terra no mundo contemporâneo, e ameaça a integridade de ecossistemas de riachos que abrigam a maior diversidade de peixes de água doce do planeta. Nosso objetivo foi testar as hipóteses de que o desmatamento afeta a abundância, a riqueza e a estru
Neotrop. ichthyol.. Publicado em: 31/01/2019
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7. Fish metacommunity structure in Caño Maraca, an important nursery habitat in the Western Llanos of Venezuela
ABSTRACT We investigated spatial and seasonal variation of fish assemblages of Caño Maraca, a creek in Venezuela’s Western Llanos, a region with strong wet-dry seasonality. Fishes were surveyed over a 19-year period at three sites along the longitudinal gradient: a headwater site with a narrow channel, a middle site with shallow channels traversing a seas
Neotrop. ichthyol.. Publicado em: 06/12/2018
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8. Muscidae (Diptera) of medico-legal importance associated with ephemeral organic substrates in seasonally dry tropical forests
Abstract Muscidae (Diptera) comprises one of the most important taxa in medical, veterinary and forensic entomology, especially due to their association with decomposing carcasses and cadavers. Yet, knowledge on their distribution and behaviour is still incipient in several biomes, which is the case of dry tropical forests. This study aimed to evaluate the a
Pap. Avulsos Zool.. Publicado em: 10/07/2018
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9. Metrics derived from fish assemblages as indicators of environmental degradation in Cerrado streams
ABSTRACT The development of effective monitoring tools depends on finding sensitive metrics that are capable of detecting the most important environmental impacts at a given region. We assessed if metrics derived from stream fish assemblages reflect physical habitat degradation and changes in land cover. We sampled the ichthyofauna and environmental characte
Zoologia (Curitiba). Publicado em: 26/04/2018
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10. What are the main local drivers determining richness and fishery yields in tropical coastal fish assemblages?
ABSTRACT Seasonal ecological effects caused by temperature and photoperiod are typically considered minimal in the tropics. Nevertheless, annual climate cycles may still influence the distribution and abundance of tropical species. Here, we investigate whether seasonal patterns of precipitation and wind speed influence the structure of coastal fish assemblag
Zoologia (Curitiba). Publicado em: 26/04/2018
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11. Ecomorphological relationships of fish assemblages in a trans-Andean drainage, Upper Magdalena River Basin, Colombia
ABSTRACT Ecomorphological patterns of the fish community were evaluated in the trans-Andean Alvarado River drainage, Colombia. A total of 29 species using 25 ecomorphological indices were analyzed to test how well the ecomorphological patterns are related to the fish assemblage. Although a significant correlation was found (Mantel test) between morphological
Neotrop. ichthyol.. Publicado em: 11/12/2017
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12. The contribution of environmental factors to fish assemblages in the Río Acahuapa, a small drainage in Central America
ABSTRACT The ichthyofauna of the Río Acahuapa was analyzed sampling 17 sites that included the basin main channel and its tributaries. Fish were collected using dip-nets, seine-nets and electrofishing. Fish standard length and species abundance were recorded. Species origin and salinity tolerance criteria were used to classify fish species. Water physicoche
Neotrop. ichthyol.. Publicado em: 05/10/2017