Résultats de la recherche
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Population dynamics of wandering albatross Diomedea exulans and Amsterdam albatross D. amsterdamensis in the Indian Ocean and their relationships with longline fisheries: conservation implications
amsterdamensis appears to have similarly recovered since 1985, but remains close to extinction. A demographic ... fishery and to a lesser extent the Patagonian tooth-fish fishery operating on the Kerguelen shelf ... : Decreased fishing effort and a concentration outside the central Indian Ocean by the Japanese fishery during ... recent years has probably resulted in the slow recovery of these albatross populations as a result of ...
Meeting Document : WG-FSA-96/09 : Auteur(s): Jouventin, P., Brothers, N., Weimerskirch, H.
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Possible effects of different levels of fishing on krill on predators - some initial modelling attempts
of the parameters of predator survival rates as functions of krill abundance, by considering a krill ... breeding success patterns for certain krill predator species. A "one-way" interaction model is ... . However, the analyses also raise a number of questions about the proper interpretation of the available ... merit discussion at the forthcoming WG-Kril1 and WG-CEMP meetings. A formalism for a "two-way" ...
Meeting Document : WG-KRILL-93/43 : Auteur(s): D.S. Butterworth and R.B. Thomson (South Africa)
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Preliminary analysis of toothfish catch, CPUE, size structure and mark-recapture data from SSRUs 486A and 486G, with comments on the sustainability of different harvest levels
in Subarea 48.6 north of 60°S (the combined SSRUs 48.6A and 48.6G). A preliminary assessment for D ... age-structured production model approach with a deterministic recruitment is applied. Age is linked ... to size via a simple von-Bertalanffy equation in which variance in catch-at-length for a given age is ... standardised using GLMs prior to their use in the assessments. A simple accounting equation is used to keep ...
Meeting Document : WG-FSA-12/31 : Auteur(s): E. Thomson and M. Bergh (South Africa)
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Assessing status and change in Southern Ocean ecosystems
Abstract: A great challenge for Southern Ocean ecosystem science is to assess the status and ... undertake these assessments? a. what is the current status of Antarctic and Southern Ocean ecosystems ... indicate a change in state of those ecosystems and provide suitable input to, validation or correction of ... circumpolar ecosystem assessments. Author(s): A. Constable (Australia), D. Costa (USA), E. Murphy (United ...
Meeting Document : WG-EMM-13/36 : Auteur(s): A. Constable (Australia), D. Costa (USA), E. Murphy (United Kingdom), E. Hofmann, O. Schofield (USA), A. Press (Australia), N. Johnston (United Kingdom) and L. Newman (Australia)
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Comparison of catches for toothfish in 58.4.1, 58.4.2, and 48.6 from vessels with anomalous CPUE
assessment of a stock. In 2013, Korea held a workshop on the anomalous CPUE data reported from some Korean ... season to illustrate a method for re-adjusting catches that may be area-misreported. We do this by using ... a standardised CPUE from these vessels to develop an estimate of the amount of catch that could ... assess the sensitivity for assessments of toothfish. Author(s): A. Dunn, B.R. Sharp (New Zealand), C ...
Meeting Document : WG-FSA-13/57 Rev. 1 : Auteur(s): A. Dunn, B.R. Sharp (New Zealand), C. Darby (United Kingdom) and O.R. Godø (Norway)
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Status of WG-SAM reviews of research plans and research proposals and recommendations for streamlining
submitted under CM 24-01. A total of 34 papers was submitted to WG-SAM-15 for review under this agenda item ... , and the lack of time available at the meeting made a meaningful review of each plan infeasible. To ... provide a structure to assist in the review process, WG-SAM requested that proponents compile a self ... -SAM review of research plans and research proposals, and to suggest a potential mechanism for more ...
Meeting Document : WG-FSA-15/14 : Auteur(s): Convener of WG-SAM and Chair of the Scientific Committee
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Considerations about managing the krill fishery at small spatial and temporal scales
Abstract: We discuss a number of ecological issues in relation to CCAMLR’s aspiration for ... detail, and a lot of detail is potentially necessary for managing at these smaller scales. Much of this ... vulnerable habitats. A body of research will be fundamental to understanding how to move beyond the current ... that krill demand from a range of predators in near-shore coastal habitats may only be met through ...
Meeting Document : WG-EMM-2019/22 : Auteur(s): P.N. Trathan, V. Warwick-Evans and E. Young
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On the use of baited remote underwater video to study Antarctic toothfish distribution under the sea-ice: from data collection to processing
Underwater Video (BRUV) allows a solution to this problem. Thanks to the collaboration between New Zealand ... and Italy, from 2015 to 2018 a series of BRUV samplings have been carried out from the fast ice of ... McMurdo Sound and Terra Nova Bay, in the southwestern Ross Sea. Here we report a methodological approach ... to obtain from the videos recorded information on abundance and size distribution related to a series ...
Meeting Document : WG-EMM-2019/50 : Auteur(s): D. Di Blasi, S. Canese, E. Carlig, L. Ghigliotti, S.J. Parker and M. Vacchi
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Summary of the toothfish fishery and tagging program in the Amundsen Sea region (SSRUs 882C–H) to 2018/19
characterisation of the fishery showed a truncation of the right-hand limb of the age distribution between 2004 and ... the ASR be made a priority to develop annual age-length keys and age frequencies. We further recommend ... -year Chapman estimates and allowing a maximum of 20% in the catch limit for 88.2H and research block ... 882_2 are: 882H: 240 t catch and allowing a maximum of 20% change in the catch limit from 200 t ...
Meeting Document : WG-FSA-2019/12 : Auteur(s): J. Devine and S. Parker
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The Secretariat review of the Strategic Plan, associated activities and outcomes
Abstract: At CCAMLR-XXIX, the Commission recommended that a staffing and salary strategy be ... at last year’s meetings of WG-SAM and WG-FSA the Commission adopted a recommendation from the ... Scientific Committee (SC-CAMLR-XXIX, paragraph 14.2) that a review of the Secretariat’s data management ... -EMM with a brief description of the process that has been supported since CCAMLR-XXIX to address these ...
Meeting Document : WG-EMM-11/09 : Auteur(s): Secretariat