Detalhes bibliográficos
| Ano de defesa: |
2008 |
| Autor(a) principal: |
MENDES, Renata Akemi Shinozaki
 |
| Orientador(a): |
HAZIN, Fábio Hissa Vieira |
| Banca de defesa: |
PEIXOTO, Silvio Ricardo Maurano,
TRAVASSOS, Paulo Eurico Pires Ferreira,
OLIVEIRA, Paulo Guilherme Vasconcelos de |
| Tipo de documento: |
Dissertação
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal Rural de Pernambuco
|
| Programa de Pós-Graduação: |
Programa de Pós-Graduação em Recursos Pesqueiros e Aquicultura
|
| Departamento: |
Departamento de Pesca e Aquicultura
|
| País: |
Brasil
|
| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6449
|
Resumo: |
From Dec./06 to Nov./07, 353 specimens of blue crab, C. guanhumi, caught in the Jaguaribe River Estuary, were examined. The mean sex ratio was equal to 1:1 throughout the studied months. The reproductive tract was described both macroscopically and microscopically. The germinative cells in the ovary are oogonia (diameter 14.17 ± 2.02 μm), pre-vitellogenic oocytes (51.02 ± 7.39 μm), vittelogenic oocytes (110.93 ± 9.33 μm), mature oocytes (237.52 ± 22.70 μm), and atretic oocytes. In the testis, the cells were classified, in order of maturation, in: spermatogonia (diameter: 10.5 ± 1.32 μm), spermatocytes (diameter: 9.6 ± 0.52 μm), spermatides (initial phase diameter: 5.6 ± 0.41 μm; final phase diameter: 4.3 ± 0.21) and spermatozoids (diameter: 3.9 ± 0.09 μm). The following stages of ovarian development were identified: immature (translucent, germinative zone containing oogonia and peripheral maturation zone with pre-vitellogenic oocytes); maturing (color ranging from yellow to dark brown; maturation zone with vitellogenic oocytes); mature (dark brown color; predominance of mature oocytes in maturation zone); spawning (dark brown or yellow color, containing non-eliminated residual oocytes; stage observed in ovigerous females); resting (translucent to yellow color, thick gonad wall and residual atretic oocytes). The following stages of testis development are suggested: immature (absence of spermatophores in the posterior vas deferens); and mature (spermatophores in the posterior vas deferens and occasionally in the ejaculatory duct). Female reproductive period starts at August and ends in February, with a peak of activity in November/ December. Ovigerous females were found from November to February. Of all males examined, 37.5% were immature and 62.5% were mature, with no seasonality in such proportion. Size at first sexual maturity, in cephalotorax width, was equal to L50morphometric = 6.12 cm; L50physiological = 5.87 cm, for females, and to 6.91 cm and 6.22, respectively, for males. The size at puberal moult was equal to 6.20 cm and 7.10 cm, for females and males, respectively. |
