Introduction to Tropical Fish Stock Assessment, Partie 2Food and Agriculture Organization of the United Nations, 1998 - 94 pages In Part 1, Manual, a selection of methods on fish stock assessment is described in detail, with examples of calculations. Special emphasis is placed on methods based on the analysis of length-frequencies. After a short introduction to statistics, it covers the estimation of growth parameters and mortality rates, virtual population methods, including age-based and length-based cohort analysis, gear selectivity, sampling, prediction models, including Beverton and Holt's yield per recruit model and Thompson and Bell's model, surplus production models, multispecies and multifleet problems, the assessment of migratory stocks, a discussion on stock/recruitment relationships and demersal trawl surveys, including the swept-area method. The manual is completed with a review of stock assessment, where an indication is given of methods to be applied at different levels of availability of input data, a review of relevant computer programs produced by or in cooperation with FAO, and a list of references, including material for further reading. In Part 2, Exercises, a number of exercises is given with solutions. The exercises are directly related to the various chapters and sections of the manual. |
Autres éditions - Tout afficher
Introduction to Tropical Fish Stock Assessment, Numéro 306,Partie 2 Per Sparre,Erik Ursin,S. C. Venema Affichage d'extraits - 1989 |
Introduction to Tropical Fish Stock Assessment, Numéro 306,Partie 2 Per Sparre,Erik Ursin,S. C. Venema Affichage d'extraits - 1989 |
Expressions et termes fréquents
age group age-based AL/At ality ality based on length Bertalanffy plot Beverton and Holt's Bhattacharya plot biomass Calculate the 95 carapace carapace length catch curve based column component confidence limits CPUE Data source ELEFAN estimate Exercise F G H fish stock assessment fishing mortality Gulland and Holt Holt plot intercept Jones Leiognathus splendens length cm length composition data length group length interval length-frequency data length-frequency sample linearized catch curve logistic curve mean biomass mean lengths medium 3 small mort MSY/R natural mortality Nemipterus nematophorus normal distributions number of survivors numbers caught ponyfish Rastrelliger kanagurta regression analysis restructured data seine net selection ogive shrimp shrimp fishery Simple random sampling SP/SN standard deviation STEP STEP STEP stratum Tasks Thompson and Bell total length Upeneus vittatus variable variance of slope weight Worksheet 2.6b yield per recruit Zalinge method ΣΥ