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1. Effects of recruitment variability and natural mortality on Generalised Yield Model projections and the CCAMLR Decision Rules for Antarctic krill

   %, 20%, or 30% were added to the observed recruitment values. The CCAMLR "depletion" decision ... Peninsula were used as proxies for recruitment variability. Simulations were run for 21 years with either no ... below 20% of its unfished value, meeting the CCAMLR "depletion" decision rule for recruitment ... maintaining spawning biomasses above 20% of unfished biomass in more than 90% of the trials. As the values for ...

   Meeting Document : WG-EMM-12/26 : Автор(ы): D. Kinzey, G. Watters and C. Reiss (USA)

2. Seasonal and interannual variability of krill, salp and other zooplankton populations in the northwest Antarctic Peninsula region: summer 2001 in relation to the Long-Term AMLR Data Set

   past 20 years. This resulted from large concentrations of Calanoides acutus, Metridia gerlachei and ... Island region during 18-30 January 2001 (Survey A, 101 stations) and 12 February-12 March 2001 (Survey D ... 1993 and 1998 salp years were not encountered. Length frequency distribution of the dominant aggregate ... preceded years with enhanced salp population size while curtailed budding periods preceded years with ...

   Meeting Document : WG-EMM-01/45 : Автор(ы): V. Loeb (USA)

3. Broadbandwidth sound scattering and absorption from krill (Meganyctiphanes norvegica), Mysids (Praunus flexuousus and Neomysis integer) and shrimp (Crangon crangon)

   (Meganyctiphanes norvegica) over the acoustical bandwidth of 30 to 210 kHz and compared to similar scattering ... derived with the generic krill shape and scaled to animal length (L). This implies that crustacean target ... volume of the animal. Collectively, these results provide tools for improving the detection of krill and ...

   Meeting Document : WG-EMM-04/40 : Автор(ы): S.G. Conti, D.A. Demer (USA) and A.S. Brierley (United Kingdom)

4. Near-shore acoustic surveys for Antarctic krill at South Georgia, January 2004

   observations from the past 20 years. A low density was perhaps not unexpected in line with recent cyclical ... were collected in seastate 6 with winds up to 30 knots and swells of approximately 2.5 m at survey ... patterns in density but may have been exacerbated by the presence of a large iceberg (40 miles by 30 miles ...

   Meeting Document : WG-EMM-04/35 : Автор(ы): A.S. Brierley, P.N. Trathan, J. Poncet and A. Morton (United Kingdom)

5. Possible effects of different levels of fishing on krill on predators - some initial modelling attempts

   dynamics model incorporating recruitment fluctuations together with information on adult survival and ... , but computations based on this approach are deferred pending clarification of the Questions raised ...

   Meeting Document : WG-KRILL-93/43 : Автор(ы): D.S. Butterworth and R.B. Thomson (South Africa)

6. ANALYSIS OF KRILL OBSERVER COVERAGE IN SUBAREA 48.3

   one season, and have been present on board for about 30% of the fishing season. They have achieved a ... efficient sampling proportion, at least for 48.3, should be >50% of vessels sampled each season, 20% of ... strategies should be pursued for at least 4 years before the Scientific Committee will have sufficient data ...

   Meeting Document : WG-EMM-09/25 : Автор(ы): D.J. Agnew, P. Grove, T. Peatman, R. Burns and C. Edwards (United Kingdom)

7. Assessment of Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.3

   recent years. Projections indicate that a constant catch of 2,420 tonnes in the 2020  and 2021 seasons ...

   Meeting Document : WG-FSA-2019/28 : Автор(ы): T. Earl

8. An index of per capita recruitment

   does not vary over age or between years; 2) 100% of age-1 animals spawn; 3) a representative sample of ... spawner when mortality is constant over all ages and years, and when all age-1 animals spawn. These ... introduce additional bias. On average, PCR will under estimate recruits per spawner by 30% if reasonable ... cycles in recruits per spawner after a 20% random sampling error was added to the value of R1 used in the ...

   Meeting Document : WG-EMM-99/50 : Автор(ы): R. Hewitt (USA)

9. 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 ... krill fishery for Euphausia superba in the Antarctic. These vessels have in recent years contributed to ...

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

10. Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3

    Article II is proposed: the primary objective is to prevent the expected lowest biomass of krill over a 20 ... reductions may prove necessary during the 20 year period considered. Simulation tests, including one ... operational definition of CCAMLR Article II to provide criteria against which to assess procedure performance ... restricted to an initial ceiling (Cc) for a 5 year period, with a reference CPUE level (CPUEref) calculated ...

    Meeting Document : SC-CAMLR-VIII/BG/17 : Автор(ы): Delegation of South Africa

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