Feeding of introduced species of Cichla (Perciformes, Cichlidae) in Volta Grande reservoir, River Grande (MG/SP)

Brazilian Journal of Biology

L. M. Gomiero¹  F. M. S. Braga¹ 

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

关键词: feeding;    Cichla;    tucunaré;    reservoir;    introduction;    Rio Grande;    alimentação;    Cichla;    tucunaré;    reservatório;    introdução;    Rio Grande;   

DOI  :  10.1590/S1519-69842004000500008

来源: SciELO

【 摘 要 】

Both species studied, Cichla cf. ocellaris and Cichla monoculus, fed mainly on fish, the first on Cichla spp., Plagioscion squamosissimus, and Tilapia rendalli, and the second, Cichla monoculus, on Cichla spp. Both diets indicated a strong correlation among the food items. Remarkable ontogenetic change was noted in both species diet: the young fed on crustaceans and insects while the adults fed mainly on fishes. The species studied, which are highly adapted to a brief life span, cause serious damage to the fish communities by predation, competition, and cascade effects throughout the whole trophic chain.

【 授权许可】

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