Résultats de la recherche

1. An index of per capita recruitment

   higher values such that the dynamic range of PCR is largest with high values of R1; increasing M tends to ... Abstract:  An index of per capita recruitment (PCR) is proposed such that Ri PCRy–1 = R1y/(1–R1y ... postulated to affect it. The formulation of PCR is based on the assumptions that: 1) post-recruit mortality ... the population is available; and 4) the proportion of age-1 animals in the sample can be determined ...

   Meeting Document : WG-EMM-99/50 : Auteur(s): R. Hewitt (USA)

2. Integrating Climate and Ecosystem Dynamics in the Southern Ocean (ICED) programme: Preliminary report of the ICED–CCAMLR Projections Workshop, 5 to 7 April 2018

   of conservation and management strategies that anticipate and adapt to potential changes in krill ... associated with climate variability and change in CCAMLR’s decision making ’ held at CCAMLR Headquarters, 5-7 ... processes that are important within Area 48. As a result of that uncertainty, signals of projected changes ... distribution shifts and reconfiguration of food webs, with both positive and negative effects. The Workshop ...

   Meeting Document : WG-EMM-18/09 : Auteur(s): E.J. Murphy, N.M. Johnston, S.P. Corney and K. Reid

3. Is current management of the Antarctic krill fishery in the Atlantic sector of the Southern Ocean precautionary?

   recent years. This suggests that fishing at the trigger level would be equivalent to a long-term ... ;50% of the trigger level since 1991. Comparison with the 9.3% reference exploitation rate suggests ... that current management is precautionary at the regional scale. The subarea catch limits help prevent ... excessive concentration of catch at the subarea scale. Finer-scale management might be necessary to manage ... of the regional biomass in recent years. This suggests that fishing at the trigger level would be ... - its (the amount of krill that the fishery is currently allowed to catch) with biomass estimates; and ... exploitation rate (the percentage of an initial biomass that can be caught each year) of 9.1%. The inputs to ... conditions are met. The precautionary catch limit specifies the catch that could be permitted when ‘the ...

   Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 31–51 : Auteur(s): Hill, S.L., A. Atkinson, C. Darby, S. Fielding, B.A. Krafft, O.R. Godø, G. Skaret, P.N. Trathan and J.L. Watkins

4. Underwater noises produced by research vessels (some comments on acoustic sampling protocol for the Area 48 synoptic survey

   that the level of underwater noise produced by vessel is an important technical property to be taken ... echosurveying has been emphasized. It has been shown that a difference between the underwater noise levels of ... vessels with the unique given level of TS and Sv thresholds used by all vessels. The importance of the ...

   Meeting Document : WG-EMM-99/18 : Auteur(s): S. Kasatkina (Russia)

5. Risk maps for Antarctic krill under projected Southern Ocean acidification

   development even if the embryos are transferred to seawater with current levels of CO 2. Krill embryos appear ... -dimensional circumpolar projection of future p CO 2, predict that by 2100 the Weddell Sea and the waters to ... south of the Polar Front is predicted to be unsuitable for hatching by the year 2300, which would lead ... to collapse of the krill population. This is the first report that explores the circumpolar impacts ...

   Meeting Document : WG-EMM-14/P06 : Auteur(s): S. Kawaguchi, A. Ishida, R. King, B. Raymond, N. Waller, A. Constable, S. Nicol, M. Wakit and A. Ishimatsu

6. Genetic population structure of the mackerel icefish, Champsocephalus gunnari, in Antarctic waters

   , with the proportion of polymorphic loci, P = 0.175, mean heterozygosities per locus, HL = 0.058, and ... expectations, with significant deviations due exclusively to heterozygote deficiencies. Genetic differentiation ... ; South Georgia vs. South Orkneys) sea areas. Nei’s (1973) gene diversity analysis indicated that over 85 ... % of the total gene diversity was due to the within-population component, with progressively higher ...

   Meeting Document : WG-FSA-91/22 : Auteur(s): G.R. Carvalho and M. Warren (United Kingdom)

7. CCAMLR Statistical Bulletin, Vol. 26

   53.947 SGP no CDS 2001 TOT CHL CHL 39.134 T++ no CDS 2001 TOT CHL CHL 3201.827 USA ... FRA 24.011 THA no CDS 2001 TOT FRA FRA 22.741 T++ no CDS 2001 TOT FRA FRA 816.674 ... T++ no CDS 2001 TOT NZL NZL 0.013 AUS no CDS 2001 TOT NZL NZL 7.886 CHN no ... TOT NZL NZL 94.758 T++ no CDS 2001 TOT NZL NZL 246.626 USA no CDS 2001 TOT PER ...

   Document : Site Section: Data

8. Interannual variation in the autumn diet of the gentoo penguin Pygoscelis papua at Laurie Island, Antarctica

   , species of the family Nototheniidae predominated in the diet with G. gibberifrons as the most important ... terms of frequency of occurrence, mass and number is compared with results of previous studies. Author(s ... T. newnesi were also well represented in the three sampling periods. A total of 1628 squid lower ...

   Meeting Document : WG-EMM-99/19 : Auteur(s): N. Coria, M. Libertelli, R. Casaux and C. Darrieu (Argentina)

9. Results from the 2019 annual acoustic krill monitoring off the South Orkney Islands

   comparison with previous survey years and provide some context for the large scale survey estimate, we here ... surveys from 2011 to 2018. The distribution was similar to previous years with most krill along the shelf ... (s):  G. Skaret, B.A. Krafft, G. Macaulay, T. Knutsen and O.A. Bergstad Title:  Results from the 2019 ...

   Meeting Document : WG-EMM-2019/69 : Auteur(s): G. Skaret, B.A. Krafft, G. Macaulay, T. Knutsen and O.A. Bergstad

10. Entanglement of Antarctic fur seals Arctocephalus gazella in man made debris at Bird Island, South Georgia during the 1999 winter and the 1999/2000 pup rearing season

    plastic packaging bands, double that observed in the 1998 winter, and a return to thehigh levels observed ... the early 1990's. Incidences of severe injury have also decreased. Entanglements in polypropylene ...

    Meeting Document : SC-CAMLR-XIX/BG/02 : Auteur(s): Delegation of the United Kingdom

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