Fishes Assemblages
Mostrando 1-12 de 18 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. 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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4. 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
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5. A novel method to obtain accurate length estimates of carnivorous reef fishes from a single video camera
In the last years, technological advances enhanced the utilization of baited underwater video (BUV) to monitor the diversity, abundance, and size composition of fish assemblages. However, attempts to use static single-camera devices to estimate fish length were limited due to high errors, originated from the variable distance between the fishes and the refer
Neotrop. ichthyol.. Publicado em: 2015-03
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6. Ecologia trófica e ecomorfologia da ictiofauna de igarapés maranhenses
The trophic ecology is one of the most important aspects to understand the role of a species in the community and in the ecosystem functioning. Studies regarding the feeding of fishes coupled to the ecomorphology of a species become important tools in understanding their ecological role and position in the environment. The present study aimed to analyze the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/06/2011
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7. Factors structuring fish assemblages in three distinct zones (river, mixture and coastal) of the rio Mambucaba estuary, Angra dos Reis-RJ. / Fatores estruturadores das assembléias de peixes em três distintas zonas (rio, mistura e costeira) do estuário do rio Mambucaba, Angra dos Reis- RJ.
The estuarine systems influence fish assemblages, throughout their longitudinal gradients and remarkable salinity changes. Such assemblages adapt to different habitat constraints and change in spatial and temporal scales. The aim of this study was to assess the ichthyofauna composition and structure in three zones of the Mambucaba estuary (CZ coastal zone; M
Publicado em: 2009
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8. ICTIOFAUNA, CONSERVAÇÃO E INTERFERÊNCIAS ANTROPOGÊNICAS EM RIACHOS DO ALTO DA BACIA DO RIO PARANÁ EM GOIÁS, REGIÃO CENTROOESTE
This study was conducted in the basin of the João Leite River, which integrates the high Paraná River basin in the southwest of the Goiás State. This river has origin in the Ouro Verde county and it empties in the Meia Ponte River, its basin shelter about 1.600.000 inhabitants distributed in seven counties. The weather is classified as hot and sub-humid w
Publicado em: 2008
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9. Cyclical temporal variation in fish assemblages at one continental and one insular sandy beaches in the Sepetiba bay. / Variações temporais cíclicas nas assembléias de peixes de uma praia continental e uma insular na baía de Sepetiba.
Bays are semi-closed coastal systems that have beaches whose environmental characteristics, location and degree of anthropogenic influences determine fish assemblages that recruit in these systems and are modeled by seasonal e short term cyclical variation. Two sandy beaches in the outer zone of Sepetiba bay were sampled throughout seasonal, daily and tide c
Publicado em: 2008
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10. Spatial and temporal (seasonal, diel and per hour) in fish assemblages from two sandy beaches with different degree of expousure to waves in Municipality of Rio de Janeiro, Brazil. / Variações espaciais e temporais (sazonais, diurnais e por horário) nas assembléias de peixes em duas praias arenosas com diferentes graus de exposição às ondas do Município do Rio de Janeiro, Brasil.
Variações espaciais e temporais (sazonais, diurnais e por horário) na composição e estrutura das assembléias de peixes das praias do Flamengo (2255S e 4310W - protegida) e de Grumari (2303 S e 4332W - exposta) foram descritas com base em 384 arrastos realizados trimestralmente ao longo de ciclos de quarenta e oito horas para coleta de peixes e tomada d
Publicado em: 2008
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11. EFEITOS DO ASSOREAMENTO SOBRE AS COMUNIDADES DE PEIXES DE IGARAPÉS DA BACIA DO RIO URUCU, COARI, AMAZONAS, BRASIL.
The siltation and the soil use effects on the fish assemblages were evaluated in Província Petrolífera de Urucu streams, between the months of September and December of 2004. The fish were collected in open water and in litter benches located in meanders. Fishnests, dipnets (rapiché) and traps were utilized to sample 27 streams with a total of 108 collect
Publicado em: 2007
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12. A ictiofauna do estuário do rio Itanhaém, SP, Brasil: dinâmica espaço-temporal e aspectos biológicos das espécies principais / Itanhaém River Estuary, SP, Brazil: Spatial and seasonal changes in fish assemblages and biological aspects of the principal species
The changes of the composition and the distribution of the fishes along the Itanhaém River Estuary were investigated, between May 2002 and April 2003. Biologic aspects of principal species were also included. The month sampling of the fishes was performed using otter trawls in three different areas in the estuary (A1, A2 and A3). Samples were also collected
Publicado em: 2007