Estimation de la mortalite pour quelques stocks de langoustine, Nephrops norvegicus

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Éditeur(s) ICES-CM-1982/K:10
Identifiant documentaire 9-2346
Identifiant OAI oai:archimer.ifremer.fr:2346
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Auteur(s): Morizur, Yvon
Mots clés ANE, Atlantic Nephrops norvegicus Malacostraca mathematical models growth length weight relationships stock assessment mortality
Date de publication 11/10/1982
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Langue fre
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Droits de réutilisation info:eu-repo/semantics/openAccess

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Total mortalities were determined in several Nephrops stocks according to two methods using length distributions with growth parameters : Beverton and holt's Method, end Ssentongo and Larkin's method. We applied these two formulae in conditions which differ from those in which they were established. Therefore validity of methods was certified by simulated length distributions. Apparent- natural mortality values of 0.2-0.3 were obtained from, length distributions of quasi-inexploited stocks. Real mortality differs from apparent mortality in effects of behaviour. Kodels used in Nephrops assessments are discussed.
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