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Importance of allochthonous resources in the diet ofAstyanax aff. fasciatus (Osteichthyes: Characidae) in streams: a longitudinal approach Biota Neotropica
Silva,Marlene R.; Fugi,Rosemara; Carniatto,Natália; Ganassin,Maria Júlia M..
The aim of this investigation was to respond the following question: is the consumption of allochthonous resources by Astyanax aff.fasciatus influenced by the longitudinal gradient in streams? To respond this question we sampled fish in the headwater, middle and mouth stretches of four streams (Upper Paraná River basin). Samplings were carried out from July 2007 to June 2008 using electrical fishing. Fish were identified, measured and their stomach contents identified and quantified. Spatial variations (among longitudinal stretches) in the diet were summarized using a principal coordinate analysis (PCoA). Spatial differences in the diet were tested with a multiresponse permutation procedure (MRPP). Allochthonous resources had the highest percentage of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish; Feeding resources; Terrestrial subsidies; Pirapó River; Paraná River.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032014000300113
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