Diet and feeding activity of Acestrorhynchus lacustris (Lütken, 1875) (Characiformes, Acestrorhynchidae) in the water reservoir at Ribeirão Claro, SP

Brazilian Journal of Biology

At. Silva¹  R. Goitein¹ 

[1] ,Universidade Estadual Paulista Instituto de Biociências Departamento de ZoologiaRio Claro SP ,Brazil

关键词: Acestrorhynchus lacustris;    peixe-cachorro;    diet;    feeding activity;    fish;    Acestrorhynchus lacustris;    peixe-cachorro;    dieta;    atividade alimentar;    peixes;   

DOI  :  10.1590/S1519-69842009000400002

来源: SciELO

【 摘 要 】

A. lacustris is a widely distributed species in the São Francisco and Paraná river basins, mainly in lentic waters. Specimens were captured monthly, over a whole year in a reservoir built by damming the Ribeirão Claro stream (SP). The stomach contents analyses showed a predominantly piscivorous diet. Feeding activity showed to be clearly less intense during winter, when all the sampling groups were compared. Despite the fact that the diet of A. lacustris presents a high diversity of prey-species, the prey size, their abundance and also behavior possibly determined a certain preference for some of them.

【 授权许可】

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