Résultats de la recherche

1. Estimating confidence intervals for fish stock abundance estimates from trawl surveys

   Abstract:  A method is developed for calculating asymptotic confidence intervals for trawl surveys using the swept area method, using likelihood ratios from Aitchison's delta distribution. Simulation tests of the method show that unbiassed estimates of the density and biomass can be obtained

   Meeting Document : WG-FSA-93/20 : Auteur(s): W.K. de la Mare (Australia)

2. Data required for implementation of management options

   Author(s):  M. Basson and J.R. Beddington (United Kingdom) Title:  Data required for implementation of management options Approval:  Approved

   Meeting Document : WS-CRAB-93/06 : Auteur(s): M. Basson and J.R. Beddington (United Kingdom)

3. A preliminary investigation of the possible effects of rhizocephalan parasitism on the management of the crab fishery around South Georgia

   Author(s):  M. Basson (United Kingdom) Title:  A preliminary investigation of the possible effects of rhizocephalan parasitism on the management of the crab fishery around South Georgia Approval:  Approved

   Meeting Document : WS-CRAB-93/07 : Auteur(s): M. Basson (United Kingdom)

4. Uncertainty, resource exploitation, and conservation: lessons from history

   Author(s):  D. Ludwig, R. Hilborn and C. Walters (USA) Title:  Uncertainty, resource exploitation, and conservation: lessons from history Approval:  Approved

   Meeting Document : WS-CRAB-93/08 : Auteur(s): D. Ludwig, R. Hilborn and C. Walters (USA)

5. Modelling crustacean fisheries: effects of parasites on management strategies

   Abstract:  The reproductive performance of commercially important crustaceans may be considerably affected by symbiotic nemertean egg predators and parasitic castrators. Because these parasites commonly affect only females or feminize males, they may be protected by management practices that

   Meeting Document : WS-CRAB-93/09 : Auteur(s): A.M. Kuris and K.D. Lafferty (USA)

6. Change-in-ratio and index-removal methods for population assessment and their application to snow crab (Chionoecetes opilio)

   Abstract:  Change-in-ratio and index-removal estimators are presented in a general form suitable for fisheries studies. We also show how to combine the two approaches in a single estimator. It is necessary to sample the population before and after the fishery, and to determine the total harvest and

   Meeting Document : WS-CRAB-93/10 : Auteur(s): X. Xu, E.G. Dawe and J.M. Hoenig (USA)

7. Relative selectivity of four sampling methods using traps and trawls for male snow crabs (Chionoecetes opilio)

   Abstract:  Catch rate and catch composition of male snow crabs were compared for four sampling methods. These methods were: (1) large-meshed commercial traps, (2) small-meshed traps, (3) bottom trawl deployed during the day. and (4) bottom trawl deployed at night. Catches were characterized in

   Meeting Document : WS-CRAB-93/11 : Auteur(s): J.M. Hoenig and E.G. Dawe (USA)

8. Growth per molt of male snow crab Chionoecetes opilio from Conception and Bonavista Bays, Newfoundland

   Abstract:  Over 6000 male snow crabs were tagged during a 6-year period in Conception Bay, Newfoundland, in order to estimate the increase in size at the time of molting. Ninety-two animals were recaptured which had usable information on growth increments. Based on the amount of growth, we

   Meeting Document : WS-CRAB-93/12 : Auteur(s): D.M. Taylor and J.M. Hoenig (USA)

9. Leslie analyses of commercial snow crab trap data: a comparative study of catchability coefficients

   Abstract:  If we could determine the relationship between catch rates in a trap survey and absolute population size, then we could estimate the standing stock of snow crabs before the fishing season from a survey conducted with traps. One way to calibrate the catch rates is to examine available

   Meeting Document : WS-CRAB-93/13 : Auteur(s): J.M. Hoenig, E.G. Dawe, D.M. Taylor, M. Eagles and J. Tremblay (USA)

10. Commercial vessel CCAMLR subsample logbook

    Author(s):  USA Title:  Commercial vessel CCAMLR subsample logbook Approval:  Approved

    Meeting Document : WS-CRAB-93/14 : Auteur(s): USA

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