Data/hora: 05/06/2024 17:13:26

Provedor de dados: 	83	
País: 	Brazil	
Título: 	Population structure and reproductive biology of Cichla kelberi (Perciformes, Cichlidae) in Lobo Reservoir, Brazil	
Autores: 	Souza,Jussara E. de; Fragoso-Moura,Evelise N.; Fenerich-Verani,Nelsy; Rocha,Odete; Verani,José R.	
Data: 	2008-01-01	
Ano: 	2008	
Palavras-chave: 	Condition factor; Fecundity; Length-weight relationship; Reproduction.	
Resumo: 	The structure of Cichla kelberi population was characterized regarding the sex ratio, total length composition and some reproductive characteristics. The specimens were collected in two periods, from November 2002 to November 2003 and from December 2004 to May 2006. The sex ratio was significantly different than 1:1. The total length varied from 3.4 to 40.1 cm, with individuals in the shortest length classes occurring throughout the year, but with greater incidence in the warmer periods. Females and males reached similar lengths and there was no difference between the sexes regarding the length-weight relationship. The estimated values of condition factor were near the central value of 1.0 and decreased during the cooler months, coinciding with periods of lower reproductive activity. Individuals with mature or semi-spent gonads occurred from November to April, indicating that Cichla kelberi reproduces for a long period of time. The spawning is partitioned, with an average absolute fecundity of 6072 oocytes (from 5220 to 6908 oocytes). The high relative condition factor values, long reproductive period, large output of fingerlings and high fecundity are biological conditions that indicate the species is well adapted in this reservoir.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000200007	
Editor: 	Sociedade Brasileira de Ictiologia	
Relação: 	10.1590/S1679-62252008000200007	
Formato: 	text/html	
Fonte: 	Neotropical Ichthyology  v.6 n.2 2008	
Fonte: 	info:eu-repo/semantics/openAccess