Résultats de la recherche

1. Refinements to the strategy for managing depleted fish stocks based on CCAMLR objectives

   Bertalanffy K = 0.12 year! Von Bertalanffy Woo = 2500 grams Age at first fishing = 5 years (knife-edge) Age ... at first spawning = 5 years (knife-edge) Pooled age-class = 20 years Higher yielding stock ... first fishing = 3 years (knife-edge) Age at first spawning = 3 years (knife-edge) Pooled age-class ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 467–475 : Auteur(s): de la Mare, W.K. and A. Constable

2. Further computations of the consequences of setting the annual krill catch limit to a fixed fraction of the estimate of krill biomass from a survey

   values for age-at-first- assumed knife-edge maturity and selectivity, and capture a n d maturi ty ... yr.' (natural mortality) oR = 0.4 (recruitment variability) a, = 3 yr (knife-edge age-at ... -recruitment) a,,, = 3 yr (knife-edge age-at-maturity) a+ = l + y r (age-range corresponding to biomass ... ] is a uniform distribution over the range [a, bl. Instead of knife-edge forms for the selectivity ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 81–106 : Auteur(s): Butterworth, D.S., G.R. Gluckman, R.B. Thomson, S. Chalis, K. Hiramatsu and D.J. Agnew

3. Length-based assessments revisited – why stock status and fishing mortality of long-lived species such as toothfish cannot be inferred from length-frequency data alone

   with natural mortality, and knife-edge selectivity. But departure from the steady-state assumption ... which older fish accumulated. The removal of catch was modelled through three knife-edge fishing ... function is knife-edged, while the maturity function is not, Pmat includes some immature fish and is thus ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 57–73 : Auteur(s): Ziegler, P.E., D.C. Welsford and A.J. Constable

4. A first attempt at an assessment of the Patagonian toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands EEZ

   sensitivity test. Note that for simplicity, both maturity and fishing selectivity are assumed to be knife ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 11–32 : Auteur(s): Brandão, A., D.S. Butterworth, B.P. Watkins and D.G.M. Miller

5. An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island

   3. This shows that recruitment to the fishery was knife-edged at age 3 in the 1997 season. Even ... the fishery was considered to be knife-edged at age 3. The fourth trial examined the consequences ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 79–101 : Auteur(s): de la Mare, W.K., R. Williams and A.J. Constable

6. Assessments of the stocks of Notothenia rossii marmorata and Champsocephalus gunnari in the South Georgia area

   data sets. 1.4 Annual Recruitment Rates If the recruitment to the fishery were a knife-edged ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 1-21 : Auteur(s): Cooke, J.G.

7. A simple approach for calculating the potential yield of krill from biomass survey results

   , and is the (knife-edge) age-at-first-capture. M F(y) ar These equations assume that the number ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 207–217 : Auteur(s): Butterworth, D.S., A.E. Punt and M. Basson

8. Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3

   Paper Title:  Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3 Abstract / Description:  An operational management procedure for krill (Euphausia superba) in Subareas 48.1, 48.2 and 48.3 requires a basis for the assessment of resource status,

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 189–219 : Auteur(s): Butterworth, D.S.

9. Assessments of by-catch in trawl fisheries at Heard and McDonald Islands

   , knife-edge selection at 200 mm was assumed for skates in these assessments. For C. rhinoceratus ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 231–243 : Auteur(s): Constable, A.J., R. Williams and W.K. de la Mare

10. A proposed management procedure for the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity

    Paper Title:  A proposed management procedure for the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity Abstract / Description:  The status of the toothfish resource in the Prince Edward Islands region is unclear because CPUE data suggest considerable depletion,

    Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 33–69 : Auteur(s): Brandão, A. and D.S. Butterworth

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