| Registro completo |
| Provedor de dados: |
BABT
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| País: |
Brazil
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| Título: |
Morphology of gonads, maturity and spawning season of Loricariichthys spixii (Siluriformes, Loricariidae) in a Subtropical Reservoir
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| Autores: |
Duarte,Silvana
Araújo,Francisco Gerson
Sales,Armando
Bazzoli,Nilo
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| Data: |
2007-11-01
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| Ano: |
2007
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| Palavras-chave: |
Loricariidae
Reservoir
Fish reproduction
Gonad morphology
Brazil
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| Resumo: |
The gonad morphology and spawning season of Loricariichthys spixii in Lajes reservoir were described based on 175 males and 613 females. Cells from the spermatogenic lineage were divided in four phases: spermatogonia (primary and secondary), spermatocytes (primary and secondary), spermatids and spermatozoa, and the cells from the ovocitarian lineage were divided in four phases: primary oocytes (O1), previtellogenic oocytes (O2), cortical vesicle oocytes (O3) and yolk globules or vitellogenic (O4). Five gonadal stages were described for the males/females according to oocytes and spermatogenic lineage cells distribution: resting (1); initial maturation (2a); advanced maturation (2b); partially spent/spawned (4a); totally spent/spawned (4b). Spawning was iteroparous, occurring throughout the year. Resting/recover occurred in July/August for the females coinciding with lower temperature and rainfall and decreasing water level. The wide spawning period was the part of the strategy developed to withstand environmental pressure and to get success in this oligotrophic and poorly structured environment.
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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=S1516-89132007000700013
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| Editor: |
Instituto de Tecnologia do Paraná - Tecpar
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| Relação: |
10.1590/S1516-89132007000700013
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| Formato: |
text/html
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| Fonte: |
Brazilian Archives of Biology and Technology v.50 n.6 2007
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| Direitos: |
info:eu-repo/semantics/openAccess
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