Early life stages of fish and the relationships with zooplankton in a tropical Brazilian reservoir: Lake Monte Alegre

Brazilian Journal of Biology

A. J. Meschiatti¹  M. S. Arcifa¹ 

[1] ,Universidade de São Paulo FFCLRP Departamento de Biologia

关键词: young fish;    feeding habits;    zooplankton predation;    reservoir;    South America;    fases jovens de peixes;    predação sobre o zooplâncton;    reservatório;    América do Sul;   

DOI  :  10.1590/S1519-69842002000100006

来源: SciELO

【 摘 要 】

For evaluating the trophic relationship between early life stages of fish and zooplankton in Lake Monte Alegre, fish distribution and feeding habits have been studied in areas with and without macrophytes. In the first of these areas, 356 specimens belonging to 8 species, mostly juveniles, were caught by a sieve. Another 35 specimens, belonging to 4 species, were caught by gill nets and seine in areas lacking macrophytes. Their diets were composed of aquatic insects, microcrustaceans, rotifers, detritus, and other aquatic invertebrates. Microcrustacean prey were mainly littoral or benthic dwellers, found in the highest proportion in specimens of 7-20 mm SL. Most fish species have parental care, which could explain the absence of planktonic larvae. Early life stages of fish do not exert a predation pressure on the lake zooplankton.

【 授权许可】

CC BY   
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