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| de Moussac, G.. |
| Commercial catches of the crabe girafe, Ranina ranina in the Seychelles are analyses. Male crabs are dominant in the catch (65_310= male to 35_310= female) Large individuals present in the catch (exceeding 115mm) are all males. The size at first maturity for female crabs is 89.5mm. One spawning season is observed annually, around December Von Bertalanffy growth estimates obtained from length frequency data using the Hasselblad method to separate the modes followed by modal progressions, are as follows: Males: L oo = 160mm, k = 0.24 per year: Females: L oo = 137mm, k = 0.12 per year. Alternative estimates are also given using the Von, Bertalanffy equation assuming seasonally oscillating growth. The total mortality which corresponds to the natural mortality... |
| Tipo: Report |
Palavras-chave: Fishery statistics; Catch statistics; Fishery biology. |
| Ano: 1988 |
URL: http://hdl.handle.net/1834/5115 |
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| de Moussac, G.. |
| Le present rapport resume et synthetise les donnees des principales publications concernant la biologie des peches artisanales aux Seychelles, depuis 1912, en particulier les rapports des prospections et de statistiques de peche. Une premiere partie presente les donnes biologiques acquises aux Seychelles {sensu strioto) sur quelques 58 especes de poissons. Certains resultats non publies (principalement proposes par l'auteur) sont egalement inclus dans ce chapitre. La seconde partie traite des donnes biologiques sur les ressources marines vivantes, autre que les poissons, a savoir les crustaces, les coquillages et les algues. Le troisieme chapitre resume les resultats concernant les quantifications des... |
| Tipo: Report |
Palavras-chave: Finfish fisheries; Fishery statistics; Population dynamics; Biological data; Stock assessment; Shellfish fisheries; Oyster fisheries. |
| Ano: 1988 |
URL: http://hdl.handle.net/1834/5126 |
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