Detalhes bibliográficos
| Ano de defesa: |
2007 |
| Autor(a) principal: |
SILVA, Carolina Martins Torres da
 |
| Orientador(a): |
TRAVASSOS, Paulo Eurico Pires Ferreira |
| Banca de defesa: |
HAZIN, Fábio Hissa Vieira,
HAZIN, Humberto Gomes,
SOUZA, Rosana Coimbra de,
SANTOS, Athiê Jorge Guerra |
| 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: |
|
| Palavras-chave em Inglês: |
|
| Área do conhecimento CNPq: |
|
| Link de acesso: |
http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6250
|
Resumo: |
Today, the Blue marlin stock is highly overexploited due to the intense fishing effort targeting tunas in the Atlantic Ocean. The blue marlin is an oceanic pelagic and migratory species caught as a tuna bycatch. Although current studies are imprecise, some mitochondrial DNA analysis has shown that there is a single Atlantic blue marlin stock. The present study has the objective to investigate the blue marlin’s reproductive biology, detailing the ovogenesis and characterizing the microscopic maturity stages. The microscopic stages were analyzed through histological cuts stained with hematoxilin/eosin and evaluated under optical microscopy. The MIF length for females ranged from 104 to 345 cm, with a mean of 210 cm. For the males the MIF length ranged from 100 to 267 cm, mean 189 cm. The microscopic maturity scale made for the species is composed of 6 stages for the females and 4 stages for the males. The sexual proportion found is 1.6 males for each female. The mean first maturity size for females was 194.2 cm and for males was 168.6 cm. The spawn type observed was the partial one. The fecundity varied from 2,151,000 and 6,769,060 oocites for females between 272 and 290 cm MIF length. |
