Data/hora: 08/06/2024 10:27:19

Provedor de dados: | Brazilian Archives of Biology and Technology
País: | Brazil
Título: | Population structure, condition factor and reproductive period of Astyanax paranae (Eigenmann, 1914) (Osteichthyes: Characidae) in a small and old Brazilian Reservoir
Autores: | Abelha,Milza Celi Fedatto; Goulart,Erivelto.
Data: | 2008-06-01
Ano: | 2008
Palavras-chave: | Brazil; Condition factor; Freshwater fish; Gonadosomatic relationship; Sexual proportion.
Resumo: | The population structure, condition and reproductive period of Astyanax paranae adult individuals inhabiting a small reservoir were investigated. The fishes were quarterly captured from the riverine and lacustrine zones of the Alagados Reservoir, Paraná, Brazil, during 1996/1997 and 1998/1999. The sex ratio differed from 1:1 with the predominance of the females in all standard length classes and total population sample. The females showed higher condition than the males. Both the sexes presented lower mean condition values in April and higher mean condition values in July. The estimated values of the regression coefficient indicated isometric growth for the females and males. The gonadosomatic relationship reached a maximum value of 14.80% for the females and 8.43% for the males. The reproductive period possibly occurred from October to April.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000300009
Editor: | Instituto de Tecnologia do Paraná - Tecpar
Relação: | 10.1590/S1516-89132008000300009
Formato: | text/html
Fonte: | Brazilian Archives of Biology and Technology  v.51 n.3 2008
Fonte: | info:eu-repo/semantics/openAccess