Reproduction of species of the genus Cichla in a reservoir in Southeastern Brazil

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: Cichla;    reproduction;    fecundity;    reservoir;    Brazil;    Cichla;    reprodução;    fecundidade;    reservatório;    Brasil;   

DOI  :  10.1590/S1519-69842004000400008

来源: SciELO

【 摘 要 】

The reproduction of two species of Cichla (Cichla cf. ocellaris and C. monoculus, commonly known in Brazil as tucunaré) introduced in the Volta Grande Reservoir, southeastern Brazil, was analyzed. The period for spawning began at the end of the dry season (September) and extended until the end of the rainy season (January). The length of the first gonad maturation (L50) and the length at which all fish are considered adults (L100) were very similar for both species and coincide with the length of fish at one year of age. The analysis of disassociated oocytes evidenced a partitioned spawning, and that C. monoculus was more prolific than C. cf. ocellaris. The low fecundity, partitioned spawning, bi-parental brood care, and supplying of food for the young are related to the way of life, habitat, and reproductive behavior of these fish.

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