Contribution à l'étude de la biologie de quelques Scombridae de l'Atlantique tropico-oriental.
Biological studies are conducted from 1946 to 1953 in a tropical Atlantic region (Cap Vert). This study involved relationship of 4 species with their environmental parameters (salinity, temperature). Those species are Neothunnus albacora. Euthynnus alletteratus; Sarda sarda and Cybium tritor. Biological aspects including reproduction, spawning and growth are examined by biometrics investigations. Cybium tritor and Euthynnus alletteratus are frequently present all the year along the coasts of Senegal. Neothunnus albacora: appears only during hot season and Sarda sarda appears only during the cold season. Species, sex and size affect the relative gonad development and lifecycle. Reproduction was studied by Hepatic and gonad somatic index variations. Sexual maturity is reached beyond 3 years for Neothunnus albacora and between 1 and 2 years in the case of Euthynnus alletteratus. It is reached about 1 year age in Cybium tritor and Sarda sarda. Growth is steady in the 4 species.
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| Format: | Book/Monograph/Conference Proceedings biblioteca |
| Language: | French |
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Station Océanographique de Salammbô (SOS)
1955
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| Subjects: | Biologie, Scombridae, Neothunnus albacora, Euthynnus alletteratus, Sarda sarda, Cybium tritor, |
| Online Access: | http://hdl.handle.net/1834/9063 |
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| Summary: | Biological studies are conducted from 1946 to 1953 in a tropical Atlantic region (Cap Vert). This study involved relationship of 4 species with their environmental parameters (salinity, temperature). Those species are Neothunnus albacora. Euthynnus alletteratus; Sarda sarda and Cybium tritor. Biological aspects including reproduction, spawning and growth are examined by biometrics investigations. Cybium tritor and Euthynnus alletteratus are frequently present all the year along the coasts of Senegal. Neothunnus albacora: appears only during hot season and Sarda sarda appears only during the cold season. Species, sex and size affect the relative gonad development and lifecycle. Reproduction was studied by Hepatic and gonad somatic index variations. Sexual maturity is reached beyond 3 years for Neothunnus albacora and between 1 and 2 years in the case of Euthynnus alletteratus. It is reached about 1 year age in Cybium tritor and Sarda sarda. Growth is steady in the 4 species. |
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