Migration of the curimbatá Prochilodus lineatus (Valenciennes, 1836) (Pisces, Prochilodontidae) at the waterfall "Cachoeira de Emas" of the Mogi-Guaçu river - São Paulo, Brazil

Brazilian Journal of Biology

A. R. Capeleti¹  M. Petrere Jr.¹ 

[1] ,UNESP Departamento de Ecologia Rio Claro SP ,Brazil

关键词: curimbatá;    Prochilodus lineatus;    freshwater fish migration;    cachoeira de Emas;    fish ladder;    Brazil;    curimbatá;    Prochilodus lineatus;    migração de peixes de água doce;    cachoeira de Emas;    escada de peixes;    Brasil;   

DOI  :  10.1590/S1519-69842006000400009

来源: SciELO

【 摘 要 】

In this paper, we counted the ascending curimbatás at the fish ladder at the Cachoeira de Emas from October, 1992 to September, 1993 in one whole day (24 h period) per month at different observation points in the dam for 5 min every hour. Most of the fish (80%) were counted not in the fish ladder itself, but in two adjacent spillways at its left, perhaps due to the comparatively increased flow as they are narrower than the ladder. The bulk of the migration occurred in September/October. We inspected the degree of injury of the fish in order to examine the hypothesis that larger fish are less injured, however no conclusion was reached. The degree of injury varied between different points and in different months of the year.

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