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 histologi...

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Veröffentlicht in:	TheScientificWorld 2012-01, Vol.2012 (2012), p.1-10
Hauptverfasser:	Araújo, Andréa Soares de, do Nascimento, Wallace Silva, Yamamoto, Maria Emília, Chellappa, Sathyabama
Format:	Artikel
Sprache:	eng
Schlagworte:	Animals Cichla kelberi Cichlasoma orientale Cichlidae Cichlids - physiology Condition factor Creagrutus menezesi Crenicichla menezesi Fecundity Female Females Male Maturation Oocytes Osteichthyes Ovaries Perciformes Pterophyllum scalare Reproduction Sex Ratio Sexual dimorphism Sexual maturity Spawning Species Testes
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Beschreibung
Zusammenfassung:	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.
ISSN:	2356-6140 1537-744X 1537-744X
DOI:	10.1100/2012/579051