Resultados de la búsqueda

1. A simulation study of the method of refining the natural mortality coefficient with Champsocephalus gunnari in Subarea 48.3 used as an example

   . As a result of this mathematical modelling study using C. gunnari in Area 48.3 as an example, it was ... shown that the proposed method facilitates such a refinement. When a mistake is made in the choice of ... natural mortality coefficient, the estimate of the free component in the equation will be other than zero ... . A bias in the estimate can be positive if the assumed natural mortality coefficient is less than the ...

   Meeting Document : WG-FSA-91/25 : Autor(es): P.S. Gasiukov and R.S. Dorovskikh (USSR)

2. Approaches to monitoring and assessing toothfish in new and exploratory fisheries, with particular reference to Subarea 88.1

   and assessing toothfish in New and Exploratory fisheries. We review standardised CPUE analysis ... recapture experiments, or trawl surveys, be used in conjunction with experimental manipulation of effort to ... effort manipulation approach in all New and Exploratory fisheries, and in particular the current active ... monitoring and assessing toothfish in new and exploratory fisheries, with particular reference to Subarea ...

   Meeting Document : WG-FSA-SAM-04/08 : Autor(es): ODriscoll, R.L., Hanchet, S.M.

3. Measures to avoid bias in abundance estimates of Dissostichus spp. based on tag-recapture data

   difficulty in accurately estimating key parameters, and consequently introduce bias into an abundance ... estimate. We also review the methods that have been used in CCAMLR tag recapture to program to mitigate ... against this bias, or to account for their effects in assessment models. In nearly all cases, examples of ... :  Measures to avoid bias in abundance estimates of Dissostichus spp. based on tag-recapture data Approval ...

   Meeting Document : WG-SAM-12/23 : Autor(es): D.C. Welsford and P.E. Ziegler (Australia)

4. An initial analysis of data provided from the deployment of scientific observers in the krill fishery

   approach analysis on the other hand revealed the distribution of variance in krill length at different ... scales and indicated that krill hauled in a given month/season/area were similar enough to be pooled to ... variability in  krill length due to seasons, months and areas and this allowed estimates of variance ... for future sampling scheme, including the  potential for an adaptive responding to the variability in ...

   Meeting Document : WG-EMM-12/60 : Autor(es): S. Thanassekos (CCAMLR Secretariat), S. Candy (Australia), E. Appleyard (CCAMLR Secretariat), S. Kawaguchi (Australia) and K. Reid (CCAMLR Secretariat)

5. Can acoustic methods be used to monitor grenadier (Macrouridae) abundance in the Ross Sea region?

   Abstract:  Grenadiers Macrourus spp. are the main bycatch species in the exploratory longline ... fishery for toothfish Dissostichus spp. in the Ross Sea, Antarctica. Ongoing monitoring tools are needed ... to assess stock status of grenadiers in the Ross Sea and to ensure ecological relationships are ... survey in February–March 2008 provide evidence that single targets close to the bottom over the Ross Sea ...

   Meeting Document : WG-FSA-12/P11 : Autor(es): R.L. O’Driscoll, S.M. Hanchet and B.S. Miller

6. Commercial fishing vessel as research vessels in the Antarctic – requirements and solutions exemplified with a new vessel

   Abstract:  The climate-induced changes presently seen in the ecosystems of Antarctic region ... require a precautionary approach with respect to the human use of these ecosystems. In particular ... the harvested stocks and their ecosystems. In this paper we describe the potential of using commercial ... fishing vessels to bridge the gap in research vessel capacity. The various tasks and required ...

   Meeting Document : WG-EMM-13/15 : Autor(es): O.R. Godø (Norway), C. Reiss (USA), V. Siegel (Germany) and J.L. Watkins (United Kingdom)

7. Adélie penguin breeder abundance in CCAMLR Divisions 58.4.1 and 58.4.2

   future krill fisheries in those regions. We present here estimates of the breeding Adélie penguin ... population for Divisions 58.4.1 and 58.4.2 in east Antarctica. We estimated that around 1.31 million pairs of ... Adelie penguins were attempting to breed at the time of the surveys in Divisions 58.4.1 and 58.4.2. This ... estimate is substantially higher than the previously available estimate in Woehler (1993) of 767,000 ...

   Meeting Document : WG-EMM-13/09 : Autor(es): C. Southwell, J. McKinlay, L. Emmerson (Australia), A. Takahashi (Japan), C. Barbraud, K. DeLord and H. Weimerskirch (France)

8. Progress report on the research fishery for Dissostichus spp. in Subarea 48.6 being jointly undertaken by Japan and South Africa: 2012/13 and 2013/14

   Abstract:  Japan and South Africa are undertaking a multi-year research plan in Statistical ... Dissostichus resource in Subarea 48.6 to be undertaken next year. Concern is expressed over the rise of IUU ... Subarea 48.6 as outlined in CM 41-04 (2012 & 2013). Progress achieved during the 2012/13 season is ... activity in Subarea 48.6 and the possible negative consequences for the Research being undertaken. Author(s ...

   Meeting Document : WG-SAM-14/10 : Autor(es): R. Leslie (South Africa), K. Taki, T. Ichii (Japan) and S. Somhlaba (South Africa)

9. A single-area stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in SSRU 88.2E for the 2004/05 season

   model for Antarctic toothfish (Dissostichus mawsoni) in SSRU 88.2E. The model structure was assumed to ... be the same as used for the Antarctic toothfish in the Ross Sea (see Dunn et al. 2005b), except that ... some evidence of non-convergence, particular in the declining right-hand limb of the fishing ... maturity ogive, there was a significant biomass of mature, but ‘invulnerable’ fish in the projection period ...

   Meeting Document : WG-FSA-05/31 : Autor(es): A. Dunn, D.J. Gilbert and S.M. Hanchet (New Zealand)

10. Quantifying vessel performance in the CCAMLR tagging program: spatially and temporally controlled measures of relative mortality and tag-detection rates

    CCAMLR of a number of toothfish fisheries in Antarctica, but the evaluation of tagging performance has ... detection rate of recaptured fish. This method was applied to the tagging data in CCAMLR Subareas 88.1 and ... 88.2. Results show that the indices developed can provide evidence of significant differences in ... indices are robust to the choice of the control group and the area included in the analysis, as well as ...

    Meeting Document : WG-FSA-12/47 Rev. 1 : Autor(es): S. Mormede and A. Dunn (New Zealand)

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