| Registro completo |
| Provedor de dados: |
R. Bras. Zootec.
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| País: |
Brazil
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| Título: |
Maternal age influences on reproductive rates in Nile tilapia (Oreochromis niloticus)
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| Autores: |
Valentin,Fernanda Nogueira
Nascimento,Nivaldo Ferreira do
Silva,Regiane Cristina da
Tsuji,Eduardo Akira
Paes,Maria do Carmo Faria
Koberstein,Teresa Cristina Ribeiro Dias
Nakaghi,Laura Satiko Okada
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| Data: |
2015-04-01
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| Ano: |
2015
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| Palavras-chave: |
Fertility
Quality of gametes
Reproduction traits
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| Resumo: |
In this study we examined the effects of the maternal age on the fecundity (absolute and relative), egg production, and fertilization rates of Nile tilapia (Oreochromis niloticus). Females were divided into three groups: Group 1 (6 years old), Group 2 (3 years old), and Group 3 (8 months old). Males of eight months were used in all groups. Twice a week, the females' mouths were examined, and if they had eggs, these were removed and transferred to 2-L incubators. No difference was observed in the absolute fecundity between the different maternal age groups. Relative fecundity and egg production was greater in Group 3 (8 months) and fertilization rates were lower in Group 1 (6 years). Younger tilapias are more viable for egg production, because they have better reproductive indexes.
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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=S1516-35982015000400161
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| Editor: |
Sociedade Brasileira de Zootecnia
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| Relação: |
10.1590/S1806-92902015000400005
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Zootecnia v.44 n.4 2015
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| Direitos: |
info:eu-repo/semantics/openAccess
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