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1. Proportional recruitment indices of Antarctic krill from Japanese fisheries data in Subareas 48.1, 48.2 and 48.3 during 1980 through 1997

   around the Elephant Island. However, the values especially R1 in this study were extremely smaller than ... Siegel et al. (1 998)'s values. This may be due to the net selectivity and/or incomplete coverage of ... the distribution of small krill by commercial fisheries. Inter-annual pattern of R1 and R2 in Subarea ... 48.2 showed somewhat similar pattern to Subarea 48.1. However, because of inconsistency of the ...

   Meeting Document : WG-EMM-98/33 : Author(s): S. Kawaguchi, T. Ichii and M. Naganobu (Japan)

2. A perspective on steepness, reference points, and stock assessment

   these patterns. For the production model, we derive explicit relationships for steepness and life ... history parameters and then for steepness and major reference points. For the age-structured model, we are ... required to generally use numerical computation, and so we provide an example that complements the ... analytical results of the production model. We discuss what it means to set steepness equal to 1 and how to ...

   Meeting Document : WG-FSA-14/P05 : Author(s): M. Mangel, A.D. MacCall, J. Brodziak, E.J. Dick, R.E. Forrest, R. Pourzand and S. Ralston

3. Relative selectivity of four sampling methods using traps and trawls for male snow crabs (Chionoecetes opilio)

   deployed during the day. and (4) bottom trawl deployed at night. Catches were characterized in terms of ... , were larger than those caught in the trawl; the size of crabs caught in the trawl at night was larger ... than those caught during the day; 2) large-clawed crabs predominated in the catches from traps whereas ... small-clawed animals predominated in the trawl catches; 3) soft-shell crabs were more common in trawl ...

   Meeting Document : WS-CRAB-93/11 : Author(s): J.M. Hoenig and E.G. Dawe (USA)

4. Part 1. Seabird assemblages during trawling operations

   Abstract:  Our knowledge of seabird assemblage composition and abundance at-sea is limited by the ... the stern rather than the bow of the vessel. The information was collected as part of the project ... "Finfish distribution and abundance in Subareas 48.1 and 48.2" developed by the Pontificia ... Universidad Católica de Valparaíso on board the fishing vessel Cabo de Hornos, between January 21 and February ...

   Meeting Document : WG-FSA-16/20 : Author(s): J.A. Arata

5. Density estimation of Antarctic krill (Euphausia superba) around South Shetland Island and Elephant Island (Subarea 48.1) using two frequencies with 38 and 120 kHz

   Abstract:  The density of Antarctic krill swarm inhabiting the Subarea 48.1, which includes the ... Elephant Island peripheries and the west and north of the South Shetland Island, was estimated using an ... in 2019. Krill were collected by the commercial midwater trawl fishing vessel. The data were ... ) each transects krill AT. The weighted krill density was estimated to be 4.27 g/m 2 (CV=43.42%) applying ...

   Meeting Document : SG-ASAM-2019/03 Rev. 1 : Author(s): S. Choi, S. Chung, I. Han, W. Oh, D. An and K. Lee

6. Light levels experienced by foraging Antarctic fur seals, Arctocephalus gazella

   Abstract:  This study examined the feasibility of using time depth recorders (TDRs) to measure ... (Arctocephalus gazella) at Bird Island, South Georgia (54° 00' S 38° 02' W) in the 1994/5 austral ... the surface illumination when diving. Illuminance ranged from full sunlight (102 lux) at the surface ... to minimum starlight (10-6 lux) at night and during deep daytime dives. The change in il1uminance ...

   Meeting Document : WG-EMM-99/28 : Author(s): D.J. McCafferty, I.L. Boyd and T.R. Walker (UnitedKingdom)

7. Seabird avoidance measures for small Alaskan longline vessels

   Abstract:  Given the lack of information on appropriate seabird avoidance measures for small ... Alaskan longline vessels, we determined the “2-m access window”, or the distance astern that longline ... (> 26 to 55 feet) using two gear types: snap-on gear and fixed gear. We also determined the ... guidelines. Vessel speed was found to be a primary determinant of both the distance astern that longline ...

   Meeting Document : WG-FSA-05/36 : Author(s): E.F. Melvin and M. Wainstein (USA)

8. On influence of acoustic survey methodology improvement on krill biomass estimation. (A comparison of results of acoustic surveys based on single-frequency and double-frequency algorithms)

   krill surveys have taken place for the recent twenty years. It has been attempted to determine the ... influence of such improvements on krill biomass estimation. The letter seems to become useful in comparative ... analysis of krill biomass data from the results of different acoustic surveys. There have been presented ... the results of krill biomass comparative estimation by single-frequency and double-frequency ...

   Meeting Document : WG-EMM-01/41 : Author(s): S.M. Kasatkina and A.P. Malyshko (Russia)

9. CEMP INDICES: 2009 UPDATE

   Abstract:  The CCAMLR Ecosystem Monitoring Program (CEMP) uses indices derived from data on ... indicator species collected by standard methods in the three Integrated Study Regions of the Convention Area ... . Each year the Secretariat updates the standardised index values and provides a summary of trends and ... and 12 CEMP parameters in 2008/09. This continues a decreasing trend in the amounts of data being ...

   Meeting Document : WG-EMM-09/05 : Author(s): Secretariat

10. INGESTION OF FISHING GEAR AND ENTANGLEMENTS OF SEABIRDS: IMPLICATIONS FOR MONITORING AND MANAGEMENT

    of a 16 year dataset collected at Bird Island indicated that the amount of gear found in association ... -headed albatross was from squid and not longline fisheries, and mistaken for natural prey rather than the ... was affected. The index of wandering albatross gear abundance showed two peaks, the most recent ... corresponding with a substantial increase in the number of multifilament snoods (gangions), suggesting that the ...

    Meeting Document : WG-IMAF-09/10 : Author(s): R.A. Phillips, C. Ridley, N. Harrison (United Kindom), K. Reid (Secretariat), G.N. Tuck (Australia) and P.J.A. Pugh (United Kingdom)

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