Résultats de la recherche

1. Proposal for a krill biomass survey for krill monitoring and management in CCAMLR Division 58.4.2-East

   further monitor seasonal dynamics of krill in the seasonally ice covered area. The survey is also designed ... to improve our understanding on the connectivity of the krill population, and overlap between krill ... and predators. A deeper understanding of all these factors will support the design of a tractable and ... sustainable long-term monitoring plan and spatial management (small-scale management unit) of the krill ...

   Meeting Document : WG-EMM-2019/03 : Auteur(s): S. Kawaguchi, M. Cox, N. Kelly, L. Emmerson and D. Welsford

2. Are tagging targets set in appropriate terms?

   is set in terms of the number of fish tagged per mass of fish caught thereby mixing “units” of ... that defining the target in terms of a percentage of the number caught may be more appropriate. Author ... Abstract:  Currently the target tagging rate to be achieved by vessels fishing in the CCAMLR area ... measure. This note questions whether it is appropriate to set the tagging targets these terms and suggests ...

   Meeting Document : WG-SAM-12/25 : Auteur(s): R.W. Leslie and C. Heinecken (South Africa)

3. Krill consumption by Adélie penguins in CCAMLR Divisions 58.4.1 and 58.4.2

   Abstract:  We estimate the total abundance of Adélie penguins foraging in Divisions 58.4.1 and ... 58.4.2 and provide preliminary estimates of krill consumed by breeding Adélie penguins in these Divisions ... breeding population than was evident from previous work. The population of breeding Adélie penguins was ... ) to March (end of moult)). We are currently extending the prey consumption model to estimate the ...

   Meeting Document : WG-EMM-16/65 : Auteur(s): C. Southwell and L. Emmerson

4. Competition-induced starvation drives large-scale population cycles in Antarctic krill

   Abstract:  Antarctic krill (Euphausia superba)—one of the most abundant animal species on Earth ... —exhibits a five to six year population cycle, with oscillations in biomass exceeding one order of magnitude ... , we identify intraspecific competition for food as the main driver of the krill cycle, while external ... that the cycle amplitude increases with reduction of krill loss rates. Thus, a decline of apex ...

   Meeting Document : WG-EMM-18/P05 : Auteur(s): A.B. Ryabov, A.M. de Roos, B. Meyer, S. Kawaguchi and B. Blasius

5. 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 ... are carried out in practice and transferred to the C1 forms. We also present a brief evaluation of ... 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 ...

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

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

   would be imprudent to rely solely on any one of these methods at the present time. We recommend that tag ... recapture experiments, or trawl surveys, be used in conjunction with experimental manipulation of effort to ... monitor toothfish – and perhaps as importantly – the wider ecosystem effects of the toothfish fisheries ... effort manipulation approach in all New and Exploratory fisheries, and in particular the current active ...

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

7. Beach litter accumulation and retention at sub-Antarctic Marion Island: trends in relation to longline fishing activity

   1998 are reported, and compared to surveys done in 1984 and 1995, prior to the onset of unregulated ... while fishing equipment also doubled during this period. An increase in the number and proportion of ... illegal fishing in this area. An exponential increase in the litter accumulation was noted in annual ... Spanish script items was noted, while French items only appeared after the onset of illegal fishing ...

   Meeting Document : CCAMLR-XVII/BG/25 : Auteur(s): Delegation of South Africa

8. REFERENCE OBSERVATIONS FOR VALIDATING AND TUNING OPERATING MODELS FOR KRILL FISHERY MANAGEMENT IN AREA 48

   reference points for the density of krill, and the abundance of “generic” seals, penguins and whales in 1970 ... considered a definitive description of the relevant dynamics. This exercise resulted in population sizes for ... Abstract:  In 2007 WG-SAM defined a set of reference observations for validating and tuning ... . The numerical calendar is a partly subjective interpretation of limited data and should not be ...

   Meeting Document : WG-EMM-08/10 : Auteur(s): S. Hill (United Kingdom), J. Hinke (USA), É. Plagányi (South Africa) and G. Watters (USA)

9. Does large-scale ocean circulation structure life history connectivity in Antarctic toothfish (Dissostichus mawsoni)?

   : successfully spawning fish spend only a part of their adult life history in the Ross Sea; areas in the eastern ... (Dissostichus mawsoni) in the Southeast Pacific Basin (SPB) and Ross Sea, with a life history structured by the ... environmental heterogeneity, yet the chemistry in otolith nuclei, deposited during early life, showed no ... differences. Age data showed only adult fish in catches on the Pacific-Antarctic Ridge in the SPB; and ...

   Meeting Document : WG-FSA-12/P02 : Auteur(s): J. Ashford, M. Dinniman, C. Brooks, A. Andrews, E. Hofmann, G. Cailliet, C. Jones and N. Ramanna

10. Report on an Antarctic cetacean survey on board a Chilean fishing vessel in February 2016

    , comprising 217 individuals, including calves of both humpback and fin whales. The preliminary results of the ... video cameras to the bow and stern section of the ship to assess any potential behavioural response to ... Abstract:  During a CCAMLR endorsed fishing survey on board the Chilean trawler ‘Cabo de Hornos ... ’ around the South Orkney Islands and Elephant Island, a trained marine mammal observer conducted a ...

    Meeting Document : WG-FSA-16/19 : Auteur(s): S. Viquerat, H. Herr, K.-H. Kock and P. Arana

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