Growth and mortality of Cichla spp. (Perciformes, Cichlidae) introduced in Volta Grande Reservoir (Grande River) and in a small artificial lake in Southeastern Brazil

Brazilian Journal of Biology

Lm. Gomiero¹  Al. Carmassi¹  Gr. Rondineli¹  Ga. Villares Junior¹  Fms Braga¹ 

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

关键词: introduction of species;    growth;    mortality;    Cichla kelberi;    Cichla piquiti;    introdução de espécies;    crescimento;    mortalidade;    Cichla kelberi;    Cichla piquiti;   

DOI  :  10.1590/S1519-69842010000500027

来源: SciELO

【 摘 要 】

The growth and mortality parameters were estimated through the analysis of length frequency distribution for species of Cichla spp. introduced into a lake in Leme (SP), and in Volta Grande reservoir (SP-MG). In Leme, Cichla kelberi presented larger frequency in the inferior classes of lengths, larger instantaneous rate of natural mortality, and smaller number of cohorts than C. kelberi and C. piquiti in Volta Grande. The values of growth performance obtained for the species were similar, corroborating the validity of the estimated growth and mortality parameters. The increase of the growth rate in small and less diverse environments occurs due to predation. The genus Cichla adapts well in locations in which it is introduced, however this adaptation shows itself to be strongly adjusted to each particular location, determining great plasticity and establishment capacity.

【 授权许可】

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