Introduction to Tropical Fish Stock Assessment, Partie 2Food and Agriculture Organization of the United Nations, 1989 - 429 pages In Part I a selection of methods on fish stock assessment is described in detail, with examples of calculations. Special emphasis is placed on methods applicable to tropical fisheries, i.e. those based on the analysis of length frequencies. After a short introduction to statistics, it covers the estimatation of growth parameters and mortality rates, virtual popualtion methods (including length and age-based methods), gear selectivity, the yield per recruit model of Beverton and Holt, the estimation of maximum sustainable yield using surplus production models, multispecies and multifleet problems, the asssessment of migratory stocks, a discussion on the stock-recruitment relationships and the execution of demersal trawl surveys. In Part 2, a number of exercises with worked out solutions is given. The exercises are directly related to the various chapters and sections of the manual. |
Table des matières
Sparre P Ursin E Venema S C | 1 |
1 | 10 |
1 | 19 |
Droits d'auteur | |
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Autres éditions - Tout afficher
Introduction to Tropical Fish Stock Assessment, Partie 1 Per Sparre,S. C. Venema Affichage d'extraits - 1998 |
Introduction to Tropical Fish Stock Assessment: Manual Per Sparre,Erik Ursin,S. C. Venema Aucun aperçu disponible - 1989 |
Expressions et termes fréquents
age group assumed assumption autumn cohort average Bertalanffy growth Beverton and Holt Bhattacharya method biomass calculated column components confidence limits consider corresponding CPUE ELEFAN example exploitation exponential decay F(MSY fish stock fish stock assessment fishery fishing grounds fishing mortality fleet gill net growth curve growth parameters Gulland and Holt haul Holt plot illustrated input data interval landing places length composition length frequency sample length group Li+1 linear regression linearized catch curve logistic curve maximum likelihood maximum sustainable yield mean length mesh migration modal progression analysis natural mortality Nemipterus marginatus normal distribution number caught number of fish number of survivors observations obtained Pauly regression analysis relative Section selection curve selection ogive shown in Fig shows slope Sparre spawning species spring cohort standard deviation Table Thompson and Bell tion total catch total mortality total number trawl Upeneus vittatus variable variance weight