Résultats de la recherche

1. An analysis of early change in the blubber thickness of minke whales as an indicator of krill availability

   Abstract:  Data on blubber thickness measured on 26,751 minke whales caught in the IWC Areas III ... significant relation were detected between blubber thickness and body length in both mature males and pregnant ... for these factors, considerable yearly variations were shown in the thickness in December, in which 12 ... . Comparison based on the difference between the thickness in December in successive years was proved valid, by ...

   Meeting Document : WG-CEMP-87/18 : Auteur(s): Y. Shimadzu (USA)

2. Uncertainty in green weight estimates from Norwegian krill fishing vessels

   an issue raised repeatedly within CCAMLR for a number of years, resulting in a modification to the C1 ... form implemented for the fleet in 2012. There are at present three Norwegian vessels operating in the ... krill fishery for Euphausia superba in the Antarctic. These vessels have in recent years contributed to ... therefore be important contributions to an estimate of total uncertainty in catch weight. Here, we present ...

   Meeting Document : WG-EMM-13/41 : Auteur(s): G. Skaret and T. Knutsen (Norway)

3. Assessing status and change in Southern Ocean ecosystems

   trends of Southern Ocean marine ecosystems overall, against which change in ecosystem structure and ... function can be unambiguously assessed in the future.  This challenge includes being able to assess the ... likelihood of different states in the future.  These requirements are needed by different bodies regionally ... and globally for making tactical decisions, such as catch limits and conservation requirements in the ...

   Meeting Document : WG-EMM-13/36 : Auteur(s): A. Constable (Australia), D. Costa (USA), E. Murphy (United Kingdom), E. Hofmann, O. Schofield (USA), A. Press (Australia), N. Johnston (United Kingdom) and L. Newman (Australia)

4. A summary of scientific observer deployments and data collection in the krill fishery during the 2011, 2012 and 2013 seasons

   Abstract:  The level of observer coverage in the krill fishery and  the  scientific sampling ... undertaken are summarised.  During 2012 all 12 of the vessels that participated in the krill fishery carried ... observers for some or all of their fishing operations. From a total of 860 vessel days of fishing in 2012 ... ‘days’. Krill length-frequency distributions showed that the greatest variability in size structure ...

   Meeting Document : WG-EMM-13/38 : Auteur(s): CCAMLR Secretariat

5. Development of the Patagonian toothfish (Dissostichus eleginoides) tagging program in Division 58.5.2, 1997–2014

   toothfish tagged and released, and 4925 recaptures. The data derived from this program has been valuable in ... estimating key population parameters for toothfish in this region, and have been used in the 2014 stock ... assessment (Ziegler, et al, 2014) in various ways including:  local abundance estimators;  natural mortality ... currently be used in an unbiased manner to estimate stock abundance. Developing spatially explicit models ...

   Meeting Document : WG-FSA-14/43 : Auteur(s): D.C. Welsford, C. Péron, P.E. Ziegler and T.D. Lamb (Australia)

6. Progress by WG-EMM-STAPP in estimating krill consumption by air-breathing predators within CCAMLR areas

   Abstract:  This paper summarises progress by WG-EMM-STAPP in estimating krill consumption by air ... -breathing predators in CCAMLR management units. There have been significant advances in estimating krill ... consumption by pack-ice seals and penguins since the last update in 2011. Estimates of pack-ice seal abundance ... krill-consuming seal species, has been estimated in Areas 48 and 58. Large-scale estimates of breeding ...

   Meeting Document : WG-EMM-16/68 : Auteur(s): C. Southwell and P. Trathan

7. Finfish distribution and abundance in Subareas 48.1 and 48.2, 2016–2018. Research proposal for the second year

   Abstract:  According to the experience gained in the first phase of the research and observations ... made by WG-SAM-16, a new proposal is provided to determine the distribution and abundance of fish in ... subareas 48.1 and 48.2. In this opportunity, the study area includes the continental shelf and slope north ... : 101-200 m, 201-260 m; 261-320 m, 320-380 m, 381-440, and 441-500 m). The sampling area was divided in ...

   Meeting Document : WG-FSA-16/31 : Auteur(s): Delegation of Chile

8. Research plan for the 2017/18 toothfish fishery in Division 58.4.4b by Japan and France

   Abstract:  Japan and France made the next season’s (2017/18) research plan in research blocks ... 58.4.4b_1 and 58.4.4b_2 using the latest CCAMLR C2 and Observer data. The estimated median stock size in ... block 58.4.4b_1 and 58.4.4b_2 was 855.39 and 1120.40, tonnes respectively, in Chapman method considering ... tags released in the last three years as effective for the biomass estimation. The estimated median ...

   Meeting Document : WG-SAM-17/02 Rev. 1 : Auteur(s): Delegations of Japan and France

9. Research plan for the 2017/18 exploratory longline fishery of D. mawsoni in Subarea 48.6 by South Africa and Japan

   Abstract:  South Africa and Japan made the next season’s (2017/18) research plan in Subarea 48.6 ... on 10 th May, 2017. The estimated median stock size in research block 48.6_2, 48.6_3, and 48.6_4 was ... 5657.54, 5162.26, and 8211.25 tonnes, respectively, in Chapman method considering tags released in the ... . The estimated median stock size in block 48.6_2, 48.6_3, and 48.6_4 was 801.17, 124.71, and 981.91 ...

   Meeting Document : WG-SAM-17/03 : Auteur(s): Delegations of Japan and South Africa

10. Simulating performance of trend analysis for setting catch limits in exploratory toothfish research plans

    Abstract:  Catch limits for toothfish in research blocks were set for the 2017/18 season using a ... qualitative analysis of trends in biomass estimated in each research block and a series of simple decision ... high or low abundance, high or low uncertainty in biomass estimates, and for populations with ... increasing, stable, or decreasing trends in abundance. The trend analysis rules performed well given the ...

    Meeting Document : WG-SAM-18/23 : Auteur(s): S. Hoyle, S. Parker, A. Dunn and S. Mormede

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