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1. Community Structure of copepods in epipelagic layers in the Ross Sea and neighboring waters

   Abstract:  During the 9th research cruise of the R/V Kaiyo-maru, copepod samples were collected ... groups by cluster analysis based on species abundance and composition. Group 1 located in the north of ... the Southern Boundary of the Antarctic Circumpolar Current was characterized by high abundance (157.5 ... -2279.5; mean 610.5 inds. 1000 m-3) and dominance of Rhincalanus gigas (mean 88.4%). Group 2 located off ...

   Meeting Document : WG-EMM-08/36 : Автор(ы): Y. Watanabe, S. Sawamoto, T. Ishimaru and M. Naganobu (Japan)

2. UPDATE ON ITEMS OF INTEREST TO WG-IMAF

   (Convention seabirds) is detailed. This paper includes a tabulation of observed captures by species and ... bycatch estimations by fishery for all seabirds. This paper also contains description of the recent and ... Economic Zone that are relevant to the work of WG-IMAF. These developments include refinement of the ... requirement of fishing practices to reduce seabird bycatch by surface longline vessels and the introduction of ...

   Meeting Document : WG-FSA-08/47 : Автор(ы): N. Walker (New Zealand)

3. Interannual variation in the diet of the Antarctic prion Pachyptila desolata at South Georgia

   Abstract:  The diet of the Antarctic Prion Pachyptila desolata was examined using food samples ... was mainly crustaceans, with a small proportion of myctophid fish and trace amounts of cephalopods ... copepods, especially Rhincalanus gigas and Calanoides acutus, in two years of low krill abundance ... . Differences in the prey species taken and observations of foraging behaviour suggest that in years of low ...

   Meeting Document : WG-EMM-97/12 : Автор(ы): Croxall, J.P., Edwards, T.M., Reid, K.

4. Conditions for the precise measurement of fish target strength in situ

   Abstract:  Conditions for precise measurement of in situ fish target strength (TS) are empirically ... studied and two indexes are introduced for this purpose. One is the number of fish in the effective ... reverberation volume which contributes echo formation at a certain instant and the other is the percentage of ... the multiple echoes which is derived from a residual of the single echo extraction. With the decrease ...

   Meeting Document : WG-Krill-94/35 : Автор(ы): K. Sawada and M. Furusawa (Japan), N.J. Williamson (USA)

5. Status of krill target strength

   Abstract:  Empirical estimates for the target strength of krill are extracted from the literature ... . These are confined to measurements on aggregations of live euphausiids, which should avoid a frequent ... cause of bias in single-animal measurements, namely thresholding. Theoretical estimates for the target ... strength are derived from the deformed-cylinder scattering model assuming specific sets of physical and ...

   Meeting Document : WG-KRILL-92/11 : Автор(ы): K.G. Foote (Norway), D. Chu and T.K. Stanton (USA)

6. Pup production and distribution of breeding Antarctic fur seals (Arctocephalus gazella) at South Georgia

   Abstract:  A census of the breeding population of Antarctic fur seals (Arctocephalus gazella) at ... South Georgia was carried out during the 1990/91 breeding season. Using counts of adult females ashore ... at the breeding grounds during the pupping period, together with corrections for the likelihood of a ... long-term study sites probably because of a short term reduction in food availability. Data from these ...

   Meeting Document : WG-CEMP-92/39 : Автор(ы): I.L. Boyd (United Kingdom)

7. Estimation of krill (Euphausia superba) mortality and production rate in the Antarctic peninsula region

   Peninsula from 26 December 1989 to 14 January 1990. Results were compared with data of an identical survey ... exceeded a factor of 35 times, while interannual variability between available surveys reached only a ... factor of 1.6 times. Krill mortality was calculated by linearized catch curve analysis and resulted a ... rate of Z=0.88 (1989/90) and Z=0.96 (1987/88). Production was estimated and resulted a P/B ratio of ...

   Meeting Document : WG-KRILL-91/15 : Автор(ы): Delegation of Germany

8. Analysis of observer coverage for Japanese krill fishing vessels

   Abstract:  Sources of variability of krill mean length and fish bycatch number was investigated to ... explore proper allocation of scientific observers on Japanese krill fishing vessels using the data from ... 1995 to 2008. Based on the multistage sampling theory, we derived the equation of variance in four ... coefficients of variation (CV) caused by the shifts in coverage at different sampling stages. Vessel coverage ...

   Meeting Document : WG-SAM-10/17 : Автор(ы): T. Okuda, M. Kiyota and H. Okamura (Japan)

9. Two decades of variability in krill predators at Bird Island, South Georgia and their potential as ecosystem indicators

   Abstract:  The breeding performance of seabirds and seals at Bird Island, South Georgia, in the ... Southern Ocean, has been recorded annually for over two decades as part of a large marine ecosystem ... monitoring programme. We examined the mechanistic relationships between, and patterns of inter-annual ... included foraging performance, offspring survival, offspring mass, the contribution of Antarctic krill ...

   Meeting Document : WG-EMM-12/16 : Автор(ы): S.L. Hill, C.M. Waluda, H.J. Peat and S. Fielding (United Kingdom)

10. Potential climate change effects on the habitat of Antarctic krill

    summer foraging sites of many of these predators are concentrated between 0° and 90°W. Parts of this ... sector have experienced recent localised sea surface warming of up to 0.2°C     per decade, and ... projections suggest that further widespread warming of 0.27° to 1.08°C will occur by the late 21st century. We ... assess the influence of projected warming on Antarctic krill habitat quality. The results divide the ...

    Meeting Document : WG-EMM-13/20 : Автор(ы): S.L. Hill, T. Phillips and A. Atkinson (United Kingdom)

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