We propose that the Concept provides a framework for integrating predictable and observable biological features of lotic systems. Implications of the concept in the areas of structure, function, and stability of riverine ecosystems are discussed.…
Ichthyology
In this subdiscipline:
35,951 papers
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Aim: To investigate biogeographical patterns of the obligate freshwater fish order Characiformes. Location: South America. Methods: Parsimony analysis of endemicity, likelihood analysis of congruent geographical distribution, and partition Bremer…
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Esta revisão apresenta uma síntese a respeito da plasticidade alimentar em teleósteos de água doce em relação às variações espaço-temporais, ontogenéticas, individuais e comportamentais. A ocorrência de dieta flexível é uma característica marcante…
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We examined intraspecific morphological diversification between river channel and lagoon habitats for two Neotropical fish (Bryconops caudomaculatus, Characidae; Biotodoma waurini, Cichlidae). We hypothesized that differences between habitats (e.g.…
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In terms of biodiversity, Brazilian inland waters are of enormous global significance for Algae (25% of the world's species), Porifera (Demospongiae, 33%), Rotifera (25%), Cladocera (Branchiopoda, 20%), and fishes (21%). Threatened freshwater…
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High species richness and evenness in structurally complex habitats has been hypothesized to be associated with niche partitioning. To test this idea, relationships between habitat structural complexity in river littoral-zone habitats and…
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A modification of the graphical Costello method is proposed for the analysis of stomach contents data. The new method allows prey importance, feeding strategy and the interand intra-individual components of niche width to be explored using graphical…
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The subfamily Loricariinae belongs to the Neotropical mailed catfish family Loricariidae. Members of Loricariinae are recognized by their long and flattened caudal peduncle and absence of an adipose fin. Despite important studies conducted on this…
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Methods for analysing fish stomach contents are listed and critically assessed with a view to their suitability for determining dietary importance2014this term is defined. Difficulties in the application of these methods are discussed and, where…
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A new species of the leptodactylid frog genus Eleutherodactylus is described from Guaraquecaba, State of Parana southern Brazil. The new species is characterized by its large size, slightly rugose to rugose dorsal skin texture, robust body, and low…
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Background: Freshwaters are the most threatened ecosystems on earth. Although recent assessments provide data on global priority regions for freshwater conservation, local scale priorities remain unknown. Refining the scale of global biodiversity…
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Neste trabalho foi realizado um levantamento das espécies de peixes de riacho que ocorrem no Parque Estadual Morro do Diabo. Quatro riachos foram amostrados, de primeira a segunda ordem, onde foram coletadas 22 espécies, pertencentes a cinco ordens…
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1. There is little information on the impacts of deforestation on the fish fauna in neotropical streams, and on parameters influencing species diversity and community structure of fish. We analysed these aspects in 12 stream sites in the Ecuadorian…
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ST2 gene products that are members of IL-1 receptor family are expressed in various cells such as growth-stimulated fibroblasts and Th2 helper T-cells, and recently, IL-33, which belongs to IL-1 family, was identified as the ligand for ST2L, the…
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Em estudos sobre distribuição espacial, alimentação e estrutura de comunidades de espécies de peixes de pequeno porte em igarapés, são aplicados alguns métodos de coleta específicos para esses ambientes. Este trabalho teve como objetivo principal…
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In this study the fish assemblages of the silted Aguas Claras stream (AC) was compared with that of a reference, the São Carlos stream (SC), so as to identify potential fish indicators of integrity or degradation. Both streams, located about 5 km…
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Fish conservation in South America is a pressing issue. The biodiversity of fishes, just as with all other groups of plants and animals, is far from fully known. Continuing habitat loss may result in biodiversity losses before full species diversity…
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A number of studies at large scales have pointed out that abiotic factors and recolonization dynamics appear to be more important than biotic interactions in structuring stream-fish assemblages. In contrast, experimental and field studies at small…
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This study was carried out on a first order stream in the Morro do Diabo State Park, southeastern Brazil. Three equidistant stream stretches - upper, middle, and lower - were chosen for underwater observations and fish collections that were…
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The fish assemblage of the floodplain of the Mamore River (Bolivia) was estimated in eight lakes, corresponding to four habitat types, situated on an environmental gradient related to the river distance: lakes situated near the river, in the…
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Researcher (at an Academic Institution)Fundación para la Investigación y el Desarrollo Sostenible FUNINDES -
Student (Master)Florianópolis, Brazil -
Student (Bachelor)Rio de Janeiro, Brazil -
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