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Trophic guilds of fishes in sandbank habitats of a Neotropical river Neotropical Ichthyology
Pereira,Poliana Ribeiro; Agostinho,Carlos Sérgio; Oliveira,Rafael José de; Marques,Elineide Eugênio.
The objective of this study was to characterize the trophic structure of the community of fishes exploiting riverine sandbank habitats. Collections were carried out during the period of October 1999 to December 2003, on six sand banks in the upper and middle portions of the Tocantins River drainage basin in central Brazil. The availability of food resources was evaluated based on the volume of the items present in the stomachs of all species. A total of 2,127 stomachs of fish belonging to 50 species were analyzed. Nine main trophic guilds grouped the local ichthyofauna according to diet. Aquatic-origin items were the preferred source for 55.5% of the groups analyzed, whereas terrestrial-origin items composed 44.4%. Items of undetermined origin (detritus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding plasticity; Fish diet; Resource availability.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000300019
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