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Relation entre la densité des microstries et le rayon de l'otolithe compatible avec le modèle de von Bertanlanffy: application à Lutjanus sebae (Cuvier, 1828) aux Seychelles OceanDocs
Bach, P.; Chauvelon, P..
Daily growth increments (DGI) density - otolith radius relationship according to the von Bertanlanffy's growth model: application to Lutjanus sebae (Cuvier, 1828) in Seychelles. Often, age determination of fishes is conducted from several parts (scales and otoliths for teleost fishes, vertebrae, spine, opercular bones, ...) displaying seasonal marks (annuli) associated with growth checks, which can be used for the estimation of individual age. Since Panella's (1971, 1974) discovery of the daily growth increments (DGI) in the teleost otoliths, age determination with DGI method has been used more and more on larval stages of both temperate and tropical species and juvenile and adult individuals of, principally, snapper and grouper species. The age study of...
Tipo: Report Palavras-chave: Otolith reading; Age determination; Methodology; Growth; Lutjanus sebae.
Ano: 1993 URL: http://hdl.handle.net/1834/5119
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Seychelles demersal fishery an analysis of data relating to four key demersal species OceanDocs
Mees, C. C..
Seychelles demersal fishery is described based on historic catch and effort data, and on biological studies of four key species: Batrican (Pristipomoides filamentosus), Job Gris (Aprion virescens), Bourgeois (Lutjanus sebae), and Maconde (Epinephelus chlorostigma). During the period 1985 - 1990 demersal species formed on average 33_310= of the total annual landings of the local fishing fleet. Schooners and whalers were the most important boat types engaging in this fishery, and more recently, a mother ship dory fishing operation. Demersal species constituted 77_310= of all local fish exports over this period. In 1990 approximately 2,000 tonnes of demersal species were landed of which 500 tonnes were exported. Lutjanids comprised 62_310= of the demersal...
Tipo: Report Palavras-chave: Demersal fisheries; Fishery data; Fish catch statistics; Catch/effort; Yield predictions; Catch composition; Pristipomoides filamentosus; Aprion virescens; Lutjanus sebae; Epinephelus chlorostigma.
Ano: 1992 URL: http://hdl.handle.net/1834/5114
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