Résultats de la recherche

1. 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)

2. Fish stock assessment survey in Subarea 48.3

   fish survey in the vicinity of South Georgia, CCAMLR Subarea 48.3, is described. Details are given of ... positions of hauls, catch rates and size composition of catches. The standing stock of one of the most ... important commercial species in the area, Champsocephalus gunnari, is shown to have undergone a major ... Paper Title:  Fish stock assessment survey in Subarea 48.3 Abstract / Description:  A demersal ... Abstract A demersal fish survey in the vicinity of South Georgia, CCAMLR Subarea 48.3, is described ... of one of the most important commercial species in the area, Champsocephalus gunnari, is shown to ... . 1. INTRODUCTION The fish stocks in Subarea 48.3, South Georgia, have been the subject of ... each of these rectangles the numbers of stations within each of these depth strata were allocated in ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 25–67 : Auteur(s): Everson, I., G. Parkes, K.-H. Kock, S. Campbell, Z. Cielniaszek and J. Szlakowski

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. Seal mitigation measures on trawl vessels fishing for krill in CCAMLR Subarea 48.3

   (WG-EMM) in Siena, Italy, the UK reported on the by-catch of fur seals (Arctocephalus gazella) in the ... avoid fur seal deaths in the fishery. WG-EMM requested that the UK provide further details of the ... Abstract / Description:  At the 2004 meeting of the Working Group on Ecosystem Monitoring and Management ... seal entanglements on krill vessels fishing around South Georgia in the 2004 fishing season. The ... -catch of fur seals (Arctocephalus gazella) in the krill fi shery around South Georgia, and on ... Management (WG-EMM) in Siena, Italy, the UK reported on the by-catch of fur seals (Arctocephalus gazella ... deployed to avoid fur seal deaths in the fi shery. WG-EMM requested the UK to provide further details of ... towards an escape opening 0.5 m in diameter in the roof of the net (Figure 4, measure 1). It was ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 195–205 : Auteur(s): Hooper, J., J.M. Clark, C. Charman and D. Agnew

9. 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)

10. 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

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