Résultats de la recherche
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Aerobic dive limit: how often does it occur in nature?
Abstract: Diving animals offer a unique opportunity to study the importance of physiological ... constraint in their everyday behaviors. An important component of the physiological capability of any diving ... animal is it’s aerobic dive limit (ADL). The ADL has only been measured in a few species. The goal of ... this study was to estimate the aerobic dive limit from measurements of body oxygen stores and at sea ...
Meeting Document : WG-EMM-00/48 : Auteur(s): D.P. Costa, N.J. Gales and M.E. Goebel (USA)
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SPATIAL PROTECTION AND MANAGEMENT OF ANTARCTIC MARINE BIODIVERSITY
Abstract: This paper is based on a presentation given at the Joint CEP/SC-CAMLR Workshop (3-4 ... April 2009). It provides information on the different objectives and types of marine spatial protection ... and management that can be implemented in Antarctic waters, including details on the tools currently ... available under CCAMLR and the Antarctic Treaty. The paper aims to bring together the relevant information ...
Meeting Document : WG-EMM-09/09 : Auteur(s): S. Grant (United Kingdom)
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Preliminary results of an age/length study of juvenile Notothenia rossii marmorata from Potter Cove, South Shetland Islands
Islands. Results from the analysis of both structures agreed in 95.5%. Likewise, the examination of ... otolith cross sections of chosen specimens confirmed in all the cases the age readings obtained from the ... second whole sagittal otolith. First October instead of the commonly accepted 1 July, was taken as the ... birth date of the fish, which is discussed. The length-age range of the fish was 18-44 cm and 3-7 years ...
Meeting Document : WG-FSA-90/09 : Auteur(s): E. Barrera-Oro and R. Casaux (Argentina)
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CHANGEMENT CLIMATIQUE ET PROTECTION SPATIALE DE PRECAUTION : PLATES-FORMES GLACIAIRES
Abstract: Regional climate change is now known to be well established in the Antarctic ... , particularly in the Antarctic Peninsula region. One of the most evident signs of climate change has been ice ... shelf collapse; overall, 87% of the Peninsula’s glaciers have retreated in recent decades. Ice shelf ... may simply include species from areas that are immediately adjacent to the collapsed ice shelf ...
Meeting Document : SC-CAMLR-XXX/13 : Auteur(s): Delegation of the United Kingdom
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Research plan for toothfish in Division 58.4.4b by Shinsei maru No. 3 in 2014/15
blocks C and D using CPUE analogy method, Petersen method and CASAL models following the methods ... recommended at the last WG-FSA meeting, although the survey for the current season has not been conducted yet ... . Detailed results using CASAL models in research block C are described in a separated document. The Shinsei ... maru No. 3 will conduct the research in June for the current (2013/14) season, thus we would submit ...
Meeting Document : WG-SAM-14/14 : Auteur(s): Delegation of Japan
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Comparison of NASC values calculated by swarm-based and grid-based acoustic data processing methods for Antarctic krill density estimation
Abstract: The one nautical mile integrated Nautical Area Scattering Coefficient (NASC) values of ... four surveys in 48.1 fishing area were calculated using both the swarm-based and conventional grid ... -based acoustic data processing methods. All parameter settings were consistent with the reports of SG ... -ASAM-2017 except that the dB difference window of Sv 120 kHz-Sv 38kHz is set 0 to 20 dB. And the two ...
Meeting Document : SG-ASAM-18/04 Rev. 1 : Auteur(s): X. Yu, X. Wang and X. Zhao
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Possible effects of different levels of fishing on krill on predators - some initial modelling attempts
Abstract: An initial attempt is made to develop the model1ing framework suggested by the Joint ... Meeting of the CCAMLR's WG-Kril1 and WG-CEMP in 1992 to address this issue. First. estimates are made ... of the parameters of predator survival rates as functions of krill abundance, by considering a krill ... developed, in which krill abundance fluctuations impact the predator population, but not vice versa ...
Meeting Document : WG-KRILL-93/43 : Auteur(s): D.S. Butterworth and R.B. Thomson (South Africa)
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Variability of krill fishery operations in Subarea 48.2 in relation to fishing methods: spatial–temporal distribution of CPUE and of fishing efforts
Abstract: The author continue to analyze krill fishery data for understanding fishery operations ... in Subarea 48.2 with special attention to the period 2006-2011 which is characterized by the highest ... values of standardized CPUE indices in the Subarea 48.2 for the last 25 years. The paper provides the ... to differences between national fleets. Our results provide the evidence that ‘high CPUE’ regime’ in ...
Meeting Document : WG-EMM-14/22 : Auteur(s): S. Kasatkina (Russia)
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Are penguins and seals in competition for Antarctic krill at South Georgia?
Abstract: The Antarctic fur seal and macaroni penguin are sympatric top predators that occur in ... the Southern Ocean around South Georgia where they are, respectively, the main mammal and bird ... consumers of Antarctic krill. In recent years the population of fur seals has increased whereas that of ... we test the hypothesis that the expanded fur seal population at South Georgia may have resulted in ...
Meeting Document : WG-EMM-01/22 : Auteur(s): K.E. Barlow, I.L. Boyd, J.P. Croxall, I.J. Staniland, K. Reid and A.S. Brierley (United Kingdom)
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Conservation of Antarctic pack-ice seals with increasing krill fishing and environmental change
Abstract: The management of Antarctic krill and conservation of its predators requires ... understanding about the compound effects of changing habitats, ecosystem interactions, and fishing practices ... . For Antarctic pack-ice seals, a main group of krill predators, we report the spatial density and krill ... consumption in the West Antarctic Peninsula (WAP)-western Weddell Sea area, the main fishery region; and we ...
Meeting Document : WS-MPA-11/24 : Auteur(s): J. Forcada, P.N. Trathan (UK), P.L. Boveng (USA), I.L. Boyd (UK), D.P. Costa (USA), M. Fedak (UK), T.L. Rogers and C.J. Southwell (Australia)