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
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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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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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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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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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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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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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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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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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Elevated levels of plasma total homocysteine are associated with a higher risk of cardiovascular disease. Betaine and 5-methyltetrahydrofolate can remethylate homocysteine into methionine via independent reactions. We determined the effect of daily…
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Feeding habits of six species of Astyanax from river Maquiné are described. Fishes were sampled bi-monthly from November/95 to September/96 in two zones of the river. Items were identified, counted and had their abundance estimated according to a…
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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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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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Morphological correlates of diet were examined in 48 species of freshwater fishes from floodplain lakes in the central part of the Mamore River (Bolivian Amazon). The species were classified, according to the percentage occurrence of seven food…
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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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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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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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Post DocCarleton University