Résultats de la recherche

1. A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2004/05

   Abstract:  The exploratory fishery for Antarctic toothfish (D. mawsoni) has been operating for ... toothfish and the associated bycatch. The 2005 D. mawsoni catch was the highest on record with a total of ... 3477 t against a catch limit of 3625 t. The catch limit was almost reached in Subarea 88.1 and exceeded ... in Subarea 88.2. D. mawsoni was the dominant catch in all 11 SSRUs fished. The main bycatch species ...

   Meeting Document : WG-FSA-05/29 : Auteur(s): S.M. Hanchet, M.L. Stevenson, N.L. Phillips and A. Dunn (New Zealand)

2. Growth models for D. eleginoides for the Heard Island plateau region (Division 58.5.2) calibrated from otolith-based length at age data and validated using mark-recapture data

   Abstract:  Length-at-age data for the Patagonian toothfish (Dissostichus eleginoides) caught by ... likelihoods that either did or did not incorporate fishing selectivity and the length-bin sampling frequencies ... for ageing relative to those for random length frequency (LF) samples to give the variable probability ... (VP) of sampling lengths. A segmented linear trawl fishing selectivity function was used where the ...

   Meeting Document : WG-FSA-05/64 Rev. 1 : Auteur(s): S.G. Candy, T. Lamb, A.J. Constable and R. Williams (Australia)

3. Stratification of catch-at-length data using tree based regression: an example using Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea

   Abstract:  This paper presents a new approach to the stratification of catch-at-length data of ... Antarctic toothfish (D. mawsoni) in the Ross Sea. Tree based regression techniques were used to stratify the ... sampled catch based on the median length of Antarctic toothfish for each set using the observer length ... frequency data. The median lengths were weighted within the regression by the inverse of the variance ...

   Meeting Document : WG-FSA-SAM-05/8 : Auteur(s): N.L. Phillips, A. Dunn and S.M. Hanchet (New Zealand)

4. Distribution of the Soviet fishing fleet and catches (CPUE) in Subdivision 48.3 during 1986–1990

   Abstract:  Analysis of the fishing fleet operation is one of preconditions of krill fishery small ... -scale management units determination. In this work the available data of haul by haul catch statistics ... for the Soviet krill fishery in subdivision 48.3 for 1986-1980 (15 thousand hauls) were analyzed ... . During the fishing season from April to September two basic fishing grounds with a quazi-stationary ...

   Meeting Document : WG-EMM-02/63 Rev. 1 : Auteur(s): V.A. Sushin, P.C. Gasiukov, A.V. Zimin and S.M. Kasatkina (Russia)

5. Subgroup on Assessment Methods: Report to the Working Group on Fish Stock Assessment 2002

   Abstract:  Over the last two years, discussions in WG-EMM, WG-FSA and the Scientific Committee ... . WG-FSA noted (paragraph 11.3, WG-FSA 2001) that there are substantial difficulties added to the work ... of the assessment subgroup when new quantitative methodologies are introduced and incorporated into ... assessments undertaken during the time of a single meeting of WG-FSA. Issues related to the current procedures ...

   Meeting Document : WG-FSA-02/80 : Auteur(s): A.J. Constable (Subgroup Coordinator)

6. Analysis of krill trawling positions north of the South Shetland Islands (Antarctic Peninsula area), 1980/81–1999/2000

   Abstract:  Inter- and intra-annual variability of commercial krill trawling positions for the 1980 ... /81 to 1999/2000 seasons in the area to the north of South Shetland Islands were analyzed in relation ... to biological and environmental factors. Commercial fishing perations concentrated on the outer shelf ... in the early 1980’s, along the shelf slope in the mid- to late 1980’s, and were highly variable, from ...

   Meeting Document : WG-EMM-01/35 : Auteur(s): S. Kawaguchi and K. Segawa

7. Revision of the fishery–foraging overlap model

   Abstract:  The fishery-foraging model of Agnew and Phegan (1995) was reviewed by the Working Group ... on Ecosystem Monitoring and Management and its Subgroup on Statistics in 1997. The review found that ... the index calculated in that model did not directly measure overlap between penguin foraging demands ... and the krill fishery in waters around the South Shetland Islands and Antarctic Peninsula, but rather ...

   Meeting Document : WG-EMM-98/05 : Auteur(s): Secretariat

8. DEFINING TAG RATES AND TACS TO OBTAIN SUITABLY PRECISE ABUNDANCE ESTIMATES FOR NEW AND EXPLORATORY FISHERIES IN THE CCAMLR CONVENTION AREA

   . With respect to the tagging-based abundance estimator, we use the Lincoln-Petersen method and derive a ... formula that gives the expected coefficient of variation of the abundance estimate in terms of the number ... of releases and recaptures, which can in turn be expressed in terms of the tagging rate per tonne ... caught, the catch taken and the postulated underlying exploitable biomass. This relationship is shown to ...

   Meeting Document : WG-SAM-08/06 : Auteur(s): R.M. Hillary (UK)

9. Entanglement of Antarctic fur seals Arctocephalus gazella in man-made debris at Bird Island, South Georgia during the 1993 winter and 1993/94 pup-rearing season

   the fourth consecutive winter and sixth consecutive summer at Bird Island, South Georgia. In the 1993 ... winter the number of entangled seals was only 39% of the record 1992 total, but still 5 times the numbers ... in 1990 and 1991. Nearly all animals were juveniles, half with severe injuries and the proportion of ... females (40%) was the highest yet reported. The proportion of animals entangled in packaging bands was the ...

   Meeting Document : SC-CAMLR-XIII/BG/03 : Auteur(s): Delegation of United Kingdom

10. Further development of coarse- and medium-scale spatially explicit population dynamics operating models for Antarctic toothfish in the Ross Sea region

    operating models for Antarctic toothfish in the Ross Sea. The operating models consider both a coarse-scale ... and medium-scale spatial resolution and consider scenarios where abundance can be present over the ... entire Ross Sea region or restricted to areas where the fishery has operated. The models are implemented ... in the generalised Bayesian population dynamics model, the Spatial Population Model (SPM). The SPM ...

    Meeting Document : WG-FSA-12/44 : Auteur(s): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)

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