Résultats de la recherche

1. Dynamics of Antarctic krill in the Bransfield Strait during austral summer and autumn investigated using acoustic data from a fishing vessel

   Abstract:  The Antarctic krill fisheries have evolved to operate in ever more concentrated ... geographical areas of predictable high krill densities, and knowledge about trends and variability in krill ... fishing vessels might help provide such insight. In the present work, the dynamics of krill with regards ... studied using acoustic data from the Chinese krill fishing vessel ‘Fu Rong Hai’ operating in the ...

   Meeting Document : WG-EMM-17/40 : Auteur(s): X. Wang, G. Skaret, O.R. Godø and X. Zhao

2. Descriptive analysis of mesopelagic backscatter from acoustic data collected in the Ross Sea

   estimate middle trophic level prey organisms (e.g., krill and mesopelagic fish) in the Ross Sea. Single ... frequency (38 kHz) acoustic data were available from New Zealand longline vessels participating in the ... exploratory fishery for toothfish in 2002–03 and 2005–06, and multifrequency (12, 38, and 120 kHz) acoustic ... data were collected from the research vessel Tangaroa during a voyage to the western Ross Sea in ...

   Meeting Document : WG-EMM-06/11 : Auteur(s): R.L. O’Driscoll (New Zealand)

3. Distribution and size-age composition of Antarctic krill in the South Orkney Islands region (CCAMLR Subarea 48.2)

   (Euphausia superba) in commercial catches by Russian trawler ' Maxim Starostin ' in the South ... Orkney region (Subarea 48.2). The fishery operations were conducted between January and March in 2008 ... in anomalous cold 2009/2010 season significant proportion of krill of cohort 2+ skipped spawning ... . Individuals of Antarctic krill in age 1+ were absent in catches in both 2008/2009 and 2009/2010 seasons ...

   Meeting Document : WG-EMM-10/16 : Auteur(s): D.O. Sologub and A.V. Remeslo (Russia)

4. Proposal for a winter longline survey of Antarctic toothfish in the northern region of Subareas 88.1 and 88.2

   up in the spring, may provide access to a productive pagophilic ecosystem for feeding as well as a ... patterns may be influenced by changes in sea ice or circulation patterns that affect observed recruitment ... productivity of the stock assumed in the stock assessment. 3) Biological characteristics of the northern ... . Evidence to date found no change in these characteristics in June, suggesting sampling later in the ...

   Meeting Document : WG-FSA-18/40 : Auteur(s): Delegation of New Zealand

5. An updated descriptive analysis of the toothfish (Dissostichus spp.) tagging program in Subareas 88.1 and 88.2 for 2006/07

   Abstract:  Descriptive analyses of the toothfish tagging programme carried out in Subareas 88.1 ... vessels and preliminary data for other vessels that fished in 2007. Release and recapture data that ... described in this paper for the first time. Overall, a reported total of 12 177 Antarctic toothfish have ... . The number of tags recaptured in the Ross Sea in 2007 by New Zealand vessels was the highest annual ...

   Meeting Document : WG-SAM-07/5 : Auteur(s): A. Dunn, S.M. Hanchet and S.L. Ballara (New Zealand)

6. Decrease in numbers of the eastern rockhopper penguins Eudyptes chrysocome filholi at Marion Island, 1994/95 to 2002/03

   from about 173 000 pairs in 1994/95 to about 67 000 pairs in 2001/02. During 1994/95-2002/03 pairs ... adults, and there was a decrease in the mass at arrival at breeding colonies of both males and females ... . Except in 1997/98, the mass of chicks at fledging was less than that recorded at two other localities ... a marked increase in the contribution of fish to the diet in 1999/00 that coincided with an increase ...

   Meeting Document : WG-EMM-03/10 : Auteur(s): R.J.M. Crawford, J. Cooper, B.M. Dyer, M.D. Greyling, N.T.W. Klages, D.C. Nel, J.L. Nel, S.L. Petersen and A.C. Wolfaardt (South Africa)

7. Interannual variation in the autumn diet of the gentoo penguin Pygoscelis papua at Laurie Island, Antarctica

   migrant adults were sampled during 1993, 1995 and 1996. Fish were the most important prey by mass in 1995 ... (81.1%) and 1996 (60.5%) whereas crustaceans predominated in 1993 (70% by mass). Euphausia superba was ... largely the most important prey among the eleven crustacean taxa identified in the samples. Among fish ... , species of the family Nototheniidae predominated in the diet with G. gibberifrons as the most important ...

   Meeting Document : WG-EMM-99/19 : Auteur(s): N. Coria, M. Libertelli, R. Casaux and C. Darrieu (Argentina)

8. Consumption of krill by minke whales in Areas IV and V of the Antarctic

   (Balaenoptera acutorostrata) in Areas IV and V of the Antarctic was estimated from diurnal change in the ... Whale Research Program Under Special Permit in the Antarctic) data. Estimates of the daily food ... summer in Areas IV and V were 14.7- 17.8 x 105 t and 63.2- 77.0 x 105 t, respectively. The values in Area ... IV were equivalent to roughly one- fourth of a total estimate biomass of krill in Area IV ...

   Meeting Document : WG-EMM-97/17 : Auteur(s): Fujise, Y., Tamura, T., Ichii, T.

9. Variation in echosounder calibration with temperature and some possible implications for acoustic surveys of krill biomass

   krill surveys, and exhibits acceptable temporal stability in system gain settings. Between Antarctic ... seasons, this echo-sounder has additionally been calibrated in temperate European waters and, under these ... conditions, calibrated gain settings differ markedly from those applied in the Antarctic, even after ... appropriate adjustments for differences in sound speed between locations have been made. Here we present ...

   Meeting Document : WG-EMM-97/52 : Auteur(s): Watkins, J.L., Woodroffe, P., Brierley, A.S., Goss, C.

10. Modelling growth and reproduction of Antarctic krill: implications of spatial and temporal trends in temperature and food for ecosystem-based management of krill fisheries

    Abstract:  Errors in the growth model used in stock assessments of Antarctic krill, specifically ... higher rates of growth than occur in reality, could inadvertantly lead to over-exploitation of the krill ... generally applied under spatially and temporally varying conditions.  In the context of assessments of ... precautionary yield for krill in CCAMLR, we recommend that this new model be incorporated into those assessments ...

    Meeting Document : WG-EMM-12/38 : Auteur(s): A.J. Constable and S. Kawaguchi (Australia)

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