Résultats de la recherche

1. Review of biological parameters for Ross Sea skates

   Abstract:  Biological parameters were reviewed and updated for the two main species of skates ... taken as bycatch in the Ross Sea toothfish fishery: Amblyraja georgiana and Bathyraja cf. eatonii ... . Differences in length-weight relationships among regions raise doubt about the conspecificity of A. georgiana ... from the Ross Sea and South Georgia, and of B. cf. eatonii from the Ross Sea and Heard Island and the ...

   Meeting Document : WG-FSA-06/31 : Auteur(s): M.P. Francis (New Zealand)

2. Diet variability and reproductive performance of macaroni penguins (Eudyptes chrysolophus) at Bird Island, South Georgia

   . frigida) in 2000. There was no clearly dominant prey group in 1999. The five-year average proportion of E ... breeding at Bird Island, South Georgia during the crèche period (January and February) between 1989 and ... 2010. Crustaceans were the main prey accounting for over 90 % of the diet by mass. Antarctic krill ... (Euphausia superba) was the main prey in 17 out of 22 years. Amphipods (Themisto gaudichaudii) were the main ...

   Meeting Document : WG-EMM-12/17 : Auteur(s): C.M. Waluda, S.L. Hill, H.J. Peat and P.N. Trathan (United Kingdom)

3. An evaluation of reduced target strength estimates reported for krill (Euphausia superba)

   on the same experiment and report new calculations of the target strength of krill (Euphausia superba ... assumptions made in calculating target strength. Whether the results of these papers are valid is critically ... important, given that they are being cited as a basis for increasing the estimates of krill standing stock ... in the Antarctic. The weaknesses in their data stem from the methods used to calculate target ...

   Meeting Document : WG-KRILL-90/13 : Auteur(s): M.C. Macaulay (USA)

4. A simulation study of krill fishing by an individual Japanese trawler

   Abstract:  A model is set up for the operation (which includes both searching and fishing) of a ... Japanese krill trawler over a half-month period, and the output is compared to statistics from a sample of ... data from the commercial fishery. Twenty-four candidate "CPUE" biomass indices are considered ... , and their performance investigated in response to six different ways in which the overall krill ...

   Meeting Document : SC-CAMLR-VI/BG/38 : Auteur(s): D.S. Butterworth (United Kingdom)

5. Coastal weather drives foraging behaviour of chinstrap penguins, Pygoscelis antarctica

   to the season where no such downwelling was detected, suggesting that changes in climate-driven ... indicators because their performance is presumed to be linked to the overall function of the ecosystem that ... supports them. In the southwest Atlantic sector of the Southern Ocean, Antarctic krill (Euphausia superba ... the ecosystem in an adaptive framework for sustainably managing krill catch levels, performance ...

   Meeting Document : WG-EMM-18/P14 : Auteur(s): A.D. Lowther, P. Trathan, A. Tarroux, C. Lydersen and K.M. Kovacs

6. Report on fish by-catch during exploratory fishing activities in Division 58.4.3a (Elan Bank) between 2008 and 2018

   Abstract:  We report on objective 2 “inform estimations of the distribution, relative abundance ... , and life history of the main bycatch species” of the suspended research plan on Patagonian toothfish ... analyzed bycatch composition in number and biomass during the period 2008-2018 to investigate the inter ... -annual variations in bycatch patterns, spatial distribution and biological parameters of the main bycatch ...

   Meeting Document : WG-FSA-2019/56 : Auteur(s): C. Péron, C. Chazeau, N. Gasco and F. Massiot-Granier

7. A comparative morphometric analysis of sagittal otoliths of three icefishes (Channichthyidae) in Antarctic waters

   Abstract:  In the present study a comparative morphometric analysis of sagittal otoliths was ... the continental shelf and slope around Elephant Island (Subarea 48.1) and the South Orkney Islands ... differences between the left and right sagittae in BSDs, a univariate and multivariate ANOVA and MANOVA were ... from the 20 harmonics analyzed were homoscedastic and normal, and showed very low level of correlation ...

   Meeting Document : WG-FSA-18/47 : Auteur(s): G. Plaza, C. Rodríguez-Valentino and P.M. Arana

8. Report on fish by-catch during research fishing activities in Division 58.4.4b between 2008 and 2018

   inform bycatch mitigation measures” of the ongoing research plan on Patagonian toothfish (Dissostichus ... composition in number and biomass during the period 2008-2018 to investigate the inter-annual variations in ... bycatch patterns, spatial distribution and biological parameters of the main bycatch species. Macrourus ... spp., Antimora rostrata and skates (mostly Amblyraja taaf) were the three dominant species caught as ...

   Meeting Document : WG-FSA-2019/53 : Auteur(s): C. Péron, C. Chazeau, N. Gasco and F. Massiot-Granier

9. Tooth growth in male Antarctic fur seals (Arctocephalus gazella) from South Georgia: an indicator of long-term growth history

   but significant increase through the period when samples were collected (l972/73–1988/89). There were ... ) and increased with age at death. Changes in the growth pattern of teeth suggested that fur seals which ... compared with the expected layer depth based on a linear relationship between layer depth and age at which ... each layer was deposited. There was significant variation in the depth of tooth growth layers deposited ...

   Meeting Document : WG-CEMP-93/11 : Auteur(s): I.L. Boyd and J.P. Roberts (United Kingdom)

10. Empirically-driven feedback management incorporating multi-scale risk assessment and an experimental framework to facilitate adaptive improvement

    merit in terms of the utility of available data. However, none currently offers a holistic solution in ... their own right.  In 2017, the Scientific Committee encouraged coordination among the various approaches ... seeks to demonstrate the practicality of its implementation that could provide CCAMLR with a “dress ... Document Release Consent:  No Delegation responsibility for releasing documents:  Norway ...

    Meeting Document : WG-EMM-2019/18 : Auteur(s): A.D. Lowther, B. Krafft, O.R. Godø, C. Cardenas, X. Zhao and O.A. Bergstad

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