Résultats de la recherche

1. Summary of Ross Sea skate tagging programme results

   Abstract:  Over 9,000 skates have been tagged and released in the Ross Sea over a period of seven ... years, and 47 (0.5%) have been recaptured. The recapture of tagged Amblyraja georgiana after up to four ... years at liberty shows that some skates survive and recover from being hauled out of depths of around ... 1,000 m and tagged. In-water tagging greatly reduces the incidence of broken jaws in skates, and ...

   Meeting Document : WG-FSA-06/32 : Auteur(s): S.L. Ballara, A. Dunn and M.P. Francis (New Zealand)

2. Results of the mark–recapture experiment in Subarea 48.3, 2005

   – distributed over the whole of the fishable grounds in 48.3 this year. The Petersen mark-recapture estimator ... from 2004 and 2005 were very similar to each other, whichever selectivity was used: about 62,000 t of ... selectivity functions are more peaked than the Kirkwood shallow selectivity used in 2004. Estimates of ... of vulnerable biomass, resulted in consistent estimates of sustainable yield of about 4,800 t ...

   Meeting Document : WG-FSA-05/17 : Auteur(s): D.J. Agnew and A. Payne (United Kingdom)

3. Diet of grey-headed albatrosses at the Diego Ramírez Islands, Chile: ecological implications

   Abstract:  The diet of grey-headed albatrosses at Diego Ramírez, Chile, was analyzed and compared ... to that of the sympatric black-browed albatross. Diet composition was inferred from an analysis of ... . The squid Martialia hyadesi predominated in the diet samples in 2001 and 2002 (89% and 81% of ... suggests that M. hyadesi plays an important role in the breeding performance of grey-headed albatrosses at ...

   Meeting Document : WG-FSA-04/12 : Auteur(s): J. Arata (Chile), G. Robertson (Australia), J. Valencia (Chile), J.C. Xavier (UK) and C.A. Moreno (Chile)

4. Updated ASPM assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity

   Abstract:  The ASPM assessment of the Prince Edward Islands toothfish resource by Brandão and ... updated to take account of further catch, GLM standardised CPUE and catch- at-length information that have ... become available for the year 2004. Twenty year biomass projections under the assumption of various ... constant annual catches are also shown. These suggest that maintenance of the present TAC of 500 tonnes is ...

   Meeting Document : WG-FSA-04/37 : Auteur(s): A. Brandão and D.S. Butterworth (South Africa)

5. Seasonal variation in acoustic estimates of krill density at South Georgia during 2001/2002

   Abstract:  Four separate acoustic surveys of Antarctic krill (Euphausia superba) were conducted ... (middle), and one in May 2002 (late). The surveys were the second in a five-year series of observations ... designed to complement and extend an existing time series of summer surveys maintained by the British ... South Georgia have revealed a similar pattern of change to that observed in 2000/2001 and highlight the ...

   Meeting Document : WG-EMM-02/39 : Auteur(s): C. Goss, S.A. Grant, N. Cunningham, J.L. Watkins, P.N. Trathan, E. Murphy and K. Reid (United Kingdom)

6. Age-at-length of Patagonian toothfish from the Falkland/Malvinas Islands

   Abstract:  To provide an age-length key for use in modelling the age structure of the Patagonian ... toothfish stock around the Falkland Islands, we used otoliths to estimate the age of a sample of 1893 ... crenellations. Two readers undertook one reading each of the sections, estimating age using criteria agreed at ... reference ages. However, the second trainee reader consistently over-estimated the age of younger fish, and ...

   Meeting Document : WG-FSA-02/74 : Auteur(s): J. Ashford, A. Arkhipkin, C. Jones and S. Bobko

7. A study of UK and Russian surveys using acoustics to augment trawling methods in shelf waters off South Georgia (Subarea 48.3)

   differences between the surveys and discuss how much of the variation between the vessels was due to ... differences in the gear used and how much was due to natural spatial/temporal variability of the stock. The ... portion of icefish biomass was located in the water column. Thus the traditional approach of using bottom ... during WG-FSA–2002. These results show that the current observation system for the collection of data for ...

   Meeting Document : WG-FSA-02/56 : Auteur(s): S. Kasatkina, P. Gasyukov (Russia), C. Goss, I. Everson, M. Belchier, T. Marlow, A. North and M. Collins (United Kingdom)

8. Green krill, the indicator of micro- and nano-size phytoplankton availability to krill

   Abstract:  Size fractionated chlorophyll-a concentrations of surface seawater was measured (pico ... -, nano-, and micro-size fractions) during commercial krill operations in the waters north of the South ... Shetland Islands from late December, 1991 to mid-February, 1992. The proportion of green krill had ... the importance of micro- and nano-size phytoplanktons in terms of food source for the Antarctic krill ...

   Meeting Document : WG-EMM-98/29 : Auteur(s): S. Kawaguchi, T. Ichii and M. Naganobu (Japan)

9. Biodiversity of the benthos off Kerguelen Islands: overview and perspectives

   number of species recorded from the Kerguelen has substantially increased. From 172 species reported by ... Arnaud (1974), the total number of species has increased dramatically to 735 (Jouventin et al., 1996) and ... northern limit of the Polar Front is probably one of the best study areas to (1) monitor the impact of ... environmental forcing; and (3) assess the biodiversity of these benthic communities. Author(s):  N. Améziane, M ...

   Meeting Document : WS-MPA-11/P03 : Auteur(s): N. Améziane, M. Eléaume, L.G. Hemery, F. Monniot, A. Hemery, M. Hautecoeur and A. Dettaï

10. Climate Change, Longevity Overfishing and Precautious Management of the Area 88 Toothfish Fishery

    Abstract:  Three aspects of current management of the “exploratory” Antarctic toothfish ... face of climate-related environmental changes currently underway. These aspects are: 1) lack of ... of this species to climate-related factors; and 3) an increase in that sensitivity owing to the ... targeted removal of the oldest, most successful and most fecund toothfish. The current strategy is to ...

    Meeting Document : WG-FSA-09/07 : Auteur(s): D. Ainley (USA), M. Massaro, G. Ballard (New Zealand) and J.T. Eastman (USA)

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