Temporal dynamics of reproduction of the neotropical fish, Crenicichla menezesi (Perciformes: Cichlidae).
The reproductive biology and the gonadal development cycle of the Neotropical cichlid fish, Crenicichla menezesi, is described. This species exhibits sexual dimorphism only during the spawning season. First sexual maturity of females is attained earlier than the males. Both macroscopic and histological investigations of ovaries and testes revealed four stages of gonadal maturation. Mean batch fecundity of females was 372 (± 10,41) of mature oocytes. This species is a partial spawner, with an extended spawning period. Monthly values of GSI and the condition factor are negatively correlated during the gonadal development cycle of this species.
Programa de Pós-Graduação em Psicobiologia, Departamento de Fisiologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte (UFRN), Avenida Salgado Filho 3000, Lagoa Nova, 59.072-970 Natal, RN, Brazil.
Andréa Soares
AS
de Araújo
Wallace Silva
WS
do Nascimento
Maria Emília
ME
Yamamoto
Sathyabama
S
Chellappa
D000818:Animals; D023681:Cichlids / Q000502:physiology*; D005260:Female; D008297:Male; D012098:Reproduction; D012744:Sex Ratio