| Registro completo |
| Provedor de dados: |
Zoologia
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| País: |
Brazil
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| Título: |
Reproductive biology of Moenkhausia intermedia (Eigenmann) (Pisces, Characiformes) in Itumbiara Reservoir, Goiás, Brazil
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| Autores: |
Hojo,Renê Eiji Souza
Santos,Gilmar Bastos
Bazzoli,Nilo
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| Data: |
2004-09-01
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| Ano: |
2004
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| Palavras-chave: |
Gonads
Reproduction
Sexual dimorphism
Sexual maturation
Spawning
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| Resumo: |
To study the reproductive biology of Moenkhausia intermedia (Eigenmann, 1908) in Itumbiara reservoir, Paranaíba river, Goiás, Brazil, a total of 301 specimens (237 females and 64 males) were captured quaterly from January to December 1993. The gonadosomatic index of females and males were related to morphologic variations of the gonads in different reproductive cycle stages (RCS). Analysis of RCS frequency and variations in the gonadosomatic index showed that M. intermedia reproduces during the whole year with fractional spawning. The smallest standard length at advanced maturity stage was estimated as 6.6 cm for females and 6.0 cm for males. The stomach repletion and coelomic fat indexes of both sexes reached peak values in the rest stage, suggesting that this species probably store energy in this phase and consume its fat reserve during reproduction. In the Itumbiara reservoir there was female predominance (4:1). Males were smaller than females, indicating sexual dimorphism in M. intermedia.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000300015
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| Editor: |
Sociedade Brasileira de Zoologia
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| Relação: |
10.1590/S0101-81752004000300015
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Zoologia v.21 n.3 2004
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| Direitos: |
info:eu-repo/semantics/openAccess
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