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1. Multiple acoustic estimates of krill density at South Georgia during 2000/2001 reveal significant intra-annual and spatial variability

   was less than that in the eastern box (80.4 g m-2). Analysis of mid-season western survey box transect ... was intermediate between the eastern and western areas. The size structure of the krill in the central ... density to the south-west of South Georgia was 32.1 g m-2 mid-season. By March, krill density in the ... single “snap-shot” acoustic survey data. This is a crucial step in the elucidation of response functions ...

   Meeting Document : WG-EMM-01/15 : Автор(ы): A.S. Brierley, C. Goss, S.A. Grant, J.L. Watkins, K. Reid, M. Belchier, I. Everson, M.J. Jessop, V. Afanasyev and J. Robst (United Kingdom)

2. IMPACTS OF CLIMATE CHANGE ON ANTARCTIC MARINE ECOSYSTEMS: A CALL FOR ACTION

   decade, but little in the way of policy or operational change has resulted at CCAMLR. Over the past 50 ... ice. "The uncertainty in climate predictions leads to uncertainty in projections of impacts, but ... Committee needs to increase its work on climate change impacts in order to consider the consequences of a ... approach to management in the context of the unknowns of climate change, and to include in this approach ...

   Meeting Document : CCAMLR-XXVII/BG/27 : Автор(ы): Submitted by ASOC

3. An index of per capita recruitment

   recruitment (PCR) is proposed such that where R 1 is the proportion of age-l animals sampled in year y and M ... distributions of R I, and three levels of M were assumed in order to investigate the resulting distributions of ... years, and when all age-l animals spawn. These conclusions are insensitive to changes in the shape of ... in mortality and reduction in the proportion of age-l spawners. Introducing year-to-year random ... the mean of the distribution is near 1. In both = loo and c = age-1 'pawn) the cases, when a was ... where R1 is the proportion of age-l animals sampled in year y and M is the post-recruit mortality rate ... sample of the population is available; and (iv) the proportion of age-l animals in the sample can be ... M were assumed in order to investigate the resulting distributions of PCR. Distributions of PCR ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 179–196 : Автор(ы): Hewitt, R

4. An index of per capita recruitment

   )eM where R1 is the proportion of age-1 animals sampled in year y and M is the post-recruit mortality ... the population is available; and 4) the proportion of age-1 animals in the sample can be determined ... assumed in order to investigate the resulting distributions of PCR. Distributions of PCR are skewed toward ... conclusions are insensitive to changes in the shape of the functional relationship between spawners and ...

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

5. NET-BASED VERIFICATION OF ACOUSTIC TECHNIQUES USED TO IDENTIFY ANTARCTIC KRILL

   model derived target id window only identified krill in 6 of the 16 nets correctly. The ‘2 freq 2-16 ... ’ algorithm attributed more than 90 % of the total backscatter to krill in all but 1 aggregation with the ‘2 ... krill in 12 out of the 16 nets. The ‘2 freq 2 – 12’ window only attributed more than 90 % of the total ... backscatter to krill in 6 nets while the ‘3 freq model’ attributed only just greater than 50 % of the ...

   Meeting Document : WG-EMM-08/54 : Автор(ы): J. Watkins and S. Fielding (United Kingdom)

6. Detailed distribution of krill fishing around South Georgia

   only been available to the scientific community in the form of sub-area or fine-scale(0.5 ° latitude by ... has operated they do not reveal the localised nature of the fishing operation. In particular they give ... available from August but the fishery was restricted in that period to an area on the western edge of the ... Abstract:  The distribution of kri!! harvesting effort and associated catch rates has previously ...

   Meeting Document : WG-EMM-96/64 : Автор(ы): Parkes, G., Everson, I., Trathan, P.N., Murphy, E.J.

7. Influence of krill availability on humpback whale breeding success

   Abstract:  The abundance of the Antarctic krill (Euphausia superba) has been declining in the ... survival) of the krill consumers may be compromised. In the present study, we investigated the reproductive ... frequency of extreme El Niño events may compromise humpback whale’s rate of recovery in the Southern ... western Antarctic Peninsula (WAP), probably as a consequence of the effects of the considerable increase ...

   Meeting Document : WG-EMM-18/P15 : Автор(ы): E. Seyboth, F. Félix, M.-A. Lea, L. Dalla Rosa, G. Watters, K. Reid and E. Secchi

8. Target strengths of krill at 136 and 20 kHz

   lengths in the range (45,50) mm the mean single-krill target strengths are in the range (-68,-69) dB at ... 136 kHz. For aggregations with mean lengths in the range (43,47)mm the mean single-krill target ... strengths are in the range (-71,-77) dB at 20 kHz. Trawling-acoustic method. For aggregations with mean ... lengths in the range (47,50) mm the mean target strengths in the range (-71,-75) dB at 20 kHz were ...

   Meeting Document : WG-KRILL-91/29 : Автор(ы): S.M. Kasatkina (USSR)

9. Age validation of juvenile Notothenia rossii at Potter Cove, South Shetland Islands, using mark-recapture data

   agreement with the known pattern of growth in summer. Likewise, an analysis in selected specimens showed ... good consistency between the numbers of sclerites deposited in scales and the time of fish release. The ... simultaneous counting of the annuli with complete correspondence.The growth in length of fish ranged from 0.5 ... Abstract:  Among all validation methods of age determination in fish, release of known age and ...

   Meeting Document : WG-FSA-13/P01 : Автор(ы): E. Moreira, E. Barrera-Oro and M. La Mesa

10. Review of some assumptions for modelling Patagonian toothfish dynamics at CCAMLR Subarea 48.3

    cases were similar, there were considerable differences in assumptions and implementations of the two ... relationship is also analyzed, in relation with the current underlying assumption of fish stock resilience ... Abstract:  During the year 2005 meeting of the WG-FSA two different methods for assessing ... Patagonian toothfish stock in CCAMLR Subarea 48.3 were available to the Working Group: CASAL and ASPM (WG-FSA ...

    Meeting Document : WG-FSA-SAM-06/13 : Автор(ы): A. Aubone, P.A. Martínez and O.C. Wöhler (Argentina)

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