Résultats de la recherche

1. Factors that may influence the accuracy of abundance estimates from CCAMLR tag-recapture programs for Dissostichus spp. and best practice for addressing bias

   spatially explicit modelling approaches is also an important next step for Dissostichus spp. assessments ... -recapture programs for Dissostichus spp. and best practice for addressing bias Abstract / Description:  The ... Lincoln-Petersen equation, the simplest form of an abundance estimator using tag-recapture data, was used ... account for their effects in stock assessments for Dissostichus spp. are also summarised. In nearly all ... (see review by Polacheck et al., 2010). For exam- ple, stock assessment model frameworks such as CASAL ... = ´ . (2) Deriving an accurate value for N using this esti- mator is based on a variety of assumptions ... ; SC-CAMLR, 2011a, 2011b). In inte- grated assessments for South Georgia and the Ross Sea, an estimate ... for depredation on tagged fish that may have occurred, however, we are unaware of such an adjustment ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 63–72 : Auteur(s): Welsford, D.C. and P.E. Ziegler

2. Alternative methods for determining subarea or local area catch limits for krill in Statistical Area 48

   current fishing patterns; and (vi) the potential for delay in implementing the alternative. An alternative ... Paper Title:  Alternative methods for determining subarea or local area catch limits for krill in ... precautionary catch limit on krill (Euphausia superba) in Statistical Area 48. The measure also implies an ... relationships between krill and their predators are explicitly considered and the potential for delayed ... single year. Then, for the following two years, that subarea would be closed to fishing. For example, if ... patterns; and (vi) the potential for delay in implementing the alternative. An alternative is less likely ... not an acceptable, long-term strategy for managing the krill fishery (SC-CAMLR, 1991). Considering ... ecosystem. There will be an initial cost to collect the data necessary for defining the impacts to ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 237–249 : Auteur(s): Watters, G. and R.P. Hewitt

3. Update of the integrated stock assessment for the Patagonian toothfish (Dissostichus eleginoides) for the Heard and McDonald Islands (Division 58.5.2)

   inclusion of random stratified trawl survey (RSTS) abundance-at-age for 2010 and 2011 and conversion of 2008 ... to a lesser degree, the longline fishery catch relatively few fish that are at an age to begin ... Abstract:  The integrated assessment of Patagonian toothfish, Dissostichus eleginoides, for the ... Heard and McDonald Islands (Division 58.5.2) was updated from WG-FSA-09/20. The main change other than ...

   Meeting Document : WG-FSA-11/24 : Auteur(s): S.G. Candy and D.C. Welsford (Australia)

4. UPDATE OF THE INTEGRATED STOCK ASSESSMENT FOR THE PATAGONIAN TOOTHFISH (DISSOSTICHUS ELEGINOIDES) FOR THE HEARD AND MCDONALD ISLANDS (DIVISION 58.5.2)

   input to CASAL as catch-at-age proportions except for the 2009 catches. For 2006 and 2007 random ... sample sizes for the commercial catch-at-age proportions, assuming a multinomial distribution, and the ... coefficient of variation (CV) for the abundance-at-age, assuming a lognormal distribution, each took into ... average of elements across nearest integer average readability scores for sub-fishery by year aged ...

   Meeting Document : WG-FSA-09/20 : Auteur(s): S.G. Candy and D.C. Welsford (Australia)

5. Data and approach for the revised stock assessment for the Heard Island and the McDonald Islands Patagonian toothfish (Dissostichus eleginoides) fishery (Division 58.5.2)

   CCAMLR Division 58.5.2. Since the last assessment in 2013, an extensive program for ageing otoliths has ... Abstract:  This paper presents the data and assessment approach for the revised stock assessment ... for Patagonian toothfish, Dissostichus eleginoides, at Heard Island and the McDonald Islands (HIMI) in ... been launched, length-at-age has been re-estimated, and research into tag-recapture data has started ...

   Meeting Document : WG-SAM-14/23 Rev. 1 : Auteur(s): P. Ziegler and D. Welsford (Australia)

6. Reviewing the need for bottle test for specified longline gear configurations

   Abstract:  During the SISO review several questions were raised about the need for continued use ... of bottle tests to allow an exemption from night setting in CCAMLR longline fisheries. There are now ... ):  Secretariat Title:  Reviewing the need for bottle test for specified longline gear configurations Approval ...

   Meeting Document : WG-FSA-14/24 : Auteur(s): Secretariat

7. Revised research plan for the exploratory fisheries for Dissostichus spp. in Division 58.4.3a in 2014/15

   ensured. We propose to set the sample size at current 32 tonnes for at least 3 years, which is likely to ... current season has not been validated and not used for the present analysis. We used updated reference ... area size for the CPUE method. Detailed results using CASAL models in the research block are described ... (paragraph 6.66 of SC-CAMLR-XXXII, ANNEX 6, 2013). As for the recommendation on east and west separation of ...

   Meeting Document : WG-FSA-14/20 : Auteur(s): Delegation of Japan

8. Assessment of the status of the Champsocephalus gunnari stock in the South Georgia area for the 1990/91 season and TAC calculations for the 1991/92 season

   . Values of catch/effort by age group and by year of fishing were used in conjunction with abundance ... fishing regime brought about by a change in mesh size (90 mm). A TAC of 59.4 thousand tonnes for C ... . gunnari is advised for an optimal regime of fishing operations at a level of F0.1 = 0.65. Author(s):  P.S ... Abstract:  An adaptive approach was used to assess the Champsocephalus. gunnari stock in Area 48.3 ...

   Meeting Document : WG-FSA-91/27 : Auteur(s): P.S. Gasiukov (USSR)

9. A simulation approach to the evaluation of recruitment surveys for D. eleginoides for the Heard Island Plateau region (Division 58.5.2)

   . For a series of 10 years of survey, age 4 recruitment was estimated using 111 RSTS stations, assuming ... -projections from each age to age 4 for each of 6 cohorts. Author(s):  S.G. Candy, C.R. Davies and A.J ... the setting of total allowable catches (TAC) for Patagonian Toothfish, Dissostichus eleginoides, for ... stratified trawl surveys (RSTS) and from targeted commercial fishing operations via an observer program ...

   Meeting Document : WG-FSA-04/74 : Auteur(s): S.G. Candy, C.R. Davies and A.J. Constable (Australia)

10. Revised research plan for the exploratory longline fishery for Dissostichus spp. in 2012/13 Subarea 48.6 and Divisions 58.4.1, 58.4.2 and 58.4.3a (this is a revision of WG-SAM-12/09)

    groups, the west of Prydz Bay region seemed to be an important area for pre-adult D.mawsoni as reported ... ° longitude x 30’ latitude box) for research is produced over the data-poor fisheries area for all vessels ... of very small proportion of immature fish. Highest GSI for D. mawsoni in March over years was ... Abstract:  The research fishing proposal for Dissostichus spp. in Subarea 48.6 and Divisions ...

    Meeting Document : WG-FSA-12/60 Rev. 1 : Auteur(s): Delegation of Japan

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