Résultats de la recherche
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Pygoscelid penguins vulnerabilities to spatio-temporal changes of the krill fisheries in the Antarctic Peninsula
Abstract: Fast climate changes in the Antarctic Peninsula are reducing krill density, which, by ... its turn, is reflected in penguin population dynamics. The increased concentration of fishing ... activities in this area in the last two to three decades is believed to have feedbacked the impacts of ... penguin population monitoring to test this assumption. We found that fisheries in Antarctic Peninsula are ...
Meeting Document : WG-EMM-2019/10 : Auteur(s): L. Krüger, F. Santacruz, L. Rebolledo and C. Cárdenas
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Revised input parameters and implications for the Antarctic toothfish (Dissostichus mawsoni) stock assessment in Subareas 88.1 and 88.2
Abstract: In this paper, we address a number of aspects of the model inputs and parameters of the ... Antarctic toothfish stock assessment for the Ross Sea fishery. In particular we review catch history, length ... -weight relationships, catch-at-length and catch-at age. In addition, we report some preliminary model ... runs that investigate the sensitivity of the 2006 stock assessment to changes in these model inputs and ...
Meeting Document : WG-SAM-07/6 : Auteur(s): A. Dunn and S.M. Hanchet (New Zealand)
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Preliminary analyses of an ectoparasite Eubrachiella antarctica as a marker for stock discrimination of Antarctic toothfish in the Ross Sea
antarctica as a marker for stock discrimination of Antarctic toothfish in the Ross Sea. New Zealand Ministry ... fins and in the buccal cavity of 621 large D. mawsoni (mostly 120-150 cm). Up to five D. mawsoni per ... set were examined for parasites in Small Scale Research Units (SSRUs) 88.1C, 88.2E and 88.2F; and two ... fish per set in SSRUs 88.1H- 88.1J. Up to 15 E. antarctica, one from each of the first fifteen sets in ...
Meeting Document : WG-FSA-06/28 : Auteur(s): P.J. Smith, A. McKenzie and L. Tubbs (New Zealand)
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Results of the tagging experiment for D. eleginoides in Subarea 48.4
the South Sandwich Islands (Subarea 48.4) in 2006 following one vessel, the Argos Helena, fishing in ... 2005. During this time animals were tagged in order to continue a mark-recapture programme started in ... proposal for continuing research in this area in 2007. Author(s): A. Payne and D.J. Agnew (United Kingdom ... ) Title: Results of the tagging experiment for D. eleginoides in Subarea 48.4 Approval: Approved ...
Meeting Document : WG-FSA-06/56 : Auteur(s): A. Payne and D.J. Agnew (United Kingdom)
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Proposal for a mark–recapture experiment to estimate toothfish population size in Subarea 48.4
Abstract: One UK vessel fished around the South Sandwich Islands (Subarea 48.4) in in July, 2005 ... in accordance with CM 41-03. During this time fish were tagged in order to start a mark-recapture ... programme to assess the toothfish population. Catch rates were similar to those experienced in Subarea 48.3 ... . The UK proposes to undertake a more extensive mark-recapture experiment in Subarea 48.4 over the 2006 ...
Meeting Document : WG-FSA-05/57 : Auteur(s): Delegation of the United Kingdom
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Physical forcing in the southwest Atlantic: ecosystem control
Abstract: In the southwest Atlantic sector of the Southern Ocean, temporal variability in the ... temperature at South Georgia shows the presence of high levels of autocorrelation, with periodicity evident in ... anomaly data for the El Niño 4 region in the Pacific show that variability at South Georgia also reflects ... temperature fluctuations in the Pacific, with the Pacific leading South Georgia by approximately 3 years ...
Meeting Document : WG-EMM-04/34 : Auteur(s): P.N. Trathan, E.J. Murphy, J. Forcada, J.P. Croxall, K. Reid and S.E. Thorpe (United Kingdom)
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Foraging areas of black-browed and grey-headed albatrosses breeding on Macquarie Island in relation to marine protected areas
-order predators, there is a paucity of data that can be used to evaluate their efficacy in achieving ... this purpose. 2. We assessed the effectiveness of a network of MPAs around Macquarie Island in the ... Exclusion Zone around Macquarie Island. In contrast, grey-headed albatrosses (T. chrysostoma) spent on only ... 34 % of their time foraging in MPAs. 4. Black-browed and grey-headed albatrosses spent 30 % and 15 ...
Meeting Document : WG-FSA-04/49 : Auteur(s): A. Terauds, R. Gales, G.B. Baker and R. Alderman (Australia)
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Preliminary assessment of Champsocephalus gunnari on the Heard Island Plateau (Division 58.5.2) based on a survey in May 2002
Abstract: A survey of mackerel icefish, Champsocephalus gunnari, was undertaken in Division ... 58.5.2 in the vicinity of Heard Island in May 2002 to provide the information for an assessment of yield ... in the 2002/2003 CCAMLR season. This paper provides a preliminary assessment of yield using the ... assessment methods of CCAMLR and discusses the implications of these results in relation to previous CCAMLR ...
Meeting Document : WG-FSA-02/47 : Auteur(s): A.J. Constable, R. Williams and T. Lamb (Australia)
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Seabird mortality on longlines in Australian waters: a case study of progress and policy
, particularly albatrosses, causing widespread declines in populations across the world. However the extent of ... bycatch in the Southern Oceans is best known for the Australian and New Zealand regions. The 10 year ... evolution of the seabird bycatch issue in the Australian Fishing Zone (AFZ), where the magnitude of the ... birds killed in the tuna longline fishery operating around Australia are albatrosses, including species ...
Meeting Document : WG-FSA-98/29 : Auteur(s): R. Gales, N. Brothers, T. Reid, D. Pemberton and G.B. Baker (Australia)
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Population assessment of Patagonian toothfish in Subarea 48.4 – 2011 update
Abstract: In this paper we update the assessment of D. eleginoides in the northern half of ... Subarea 48.4 presented in 2010. The CASAL model is improved through the incorporation catch at age data ... , as an alternative to the catch at length data that were the only such data available in 2010. The ... catch at age model generates a yield of 52 tonnes based on CCAMLR decision rules. In 2006 the northern ...
Meeting Document : WG-FSA-11/38 : Auteur(s): J. Roberts, R. Mitchell and R. Wakeford (United Kingdom)