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Seasonal and interannual variation in foraging range and habitat of macaroni penguins Eudyptes chrysolophus at South Georgia
Abstract: In marine ecosystems, characterisation of the foraging areas and habitats of predators ... is a key factor in interpreting their ecological role. We studied the foraging areas of the macaroni ... penguin Eudyptes chrysolophus at Bird Island, South Georgia, throughout the breeding seasons of 1999 to ... between different stages of the breeding season, between sexes, between years and between individuals ...
Meeting Document : WG-EMM-02/21 Text : Автор(ы): K.E. Barlow and J.P. Croxall (United Kingdom)
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OCEANIC CIRCUMPOLAR HABITATS OF ANTARCTIC KRILL
growth rates and predation losses are atypically high. Emphasis on these areas has led to the current ... , with 70% of the total stock concentrated between 0o and 90oW. Within this Atlantic sector, krill are ... abundant over both shelf and ocean. At the Antarctic Peninsula, by contrast, they are found mainly over the ... inner shelf whereas in the Indian-Pacific sectors krill prevail in the ocean within 200-300 km of the ...
Meeting Document : WG-EMM-08/P04 - Abstract : Автор(ы): A. Atkinson, V. Siegel, E. A. Pakhomov, P. Rothery, V. Loeb, R.M. Ross, L.B. Quetin, K. Schmidt, P. Fretwell, E.J. Murphy, G.A. Tarling and A.H. Fleming
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Revised reports on abundance and biological information on toothfish in Divisions 58.4.4 a and 58.4.4b by Shinsei maru No. 3 in 2011/12
Abstract: A survey was conducted in order to collect information for the stock status and various ... 28.3 tonnes in the survey area in 70 longline sets. Mean CPUEs of D. eleginoides was 48.3 kg / km (CV ... = 79.1%) in terms of weight. The mean CPUE in terms of weight in SSRU B (32.1 kg / km) was rather lower ... than that (50.5 kg / km) in the same SSRU in 2010/11. A total of 172 individuals of toothfish with good ...
Meeting Document : WG-FSA-12/57 : Автор(ы): K. Taki, T. Iwami, M. Kiyota and T. Ichii (Japan)
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Research plan for toothfish in Division 58.4.4a & b by Shinsei Maru No. 3 in 2013/14
Division 58.4.4 a & b. Regarding SSRU C, the stock size was estimated by using following six methods; 1 ... ) CASAL_0_IUU model, and 6) CASAL_all_IUU model. This approach was made based on the WG-FSA’s recommendation ... stating that the sensitivity run of the CASAL model should be made by using levels of IUU ranging from ... zero to all observed IUU fishing, and using constant YCS (year class strength) in SSRU C. The ...
Meeting Document : WG-SAM-13/21 : Автор(ы): Delegation of Japan
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Fishing for structure; can we describe normal patterns in toothfish fishing operations using catch and effort data?
Abstract: We describe the typical steps involved in demersal longline fishing operations for ... toothfish in CCAMLR fisheries and link those steps to the variables recorded as part of the CCAMLR catch and ... effort data reporting system. We then describe statistical properties of the recorded variables and how ... more difficult to evaluate given the wide range of influences that may affect recorded values for a ...
Meeting Document : WG-FSA-16/36 : Автор(ы): J.M. Fenaughty and K. Large
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Environmental response of upper trophic level predators reveals a system change in an Antarctic marine ecosystem
Abstract: In the Antarctic Peninsula region current, long-term changes in the physical ... increase in the frequency of years of low reproductive output. Changes in the population structure of krill ... , and its relationship with reproductive performance, suggest that the biomass of krill within the ... largest size class was sufficient to support predator demand in the 1980's but not in the 1990's ...
Meeting Document : WG-EMM-01/21 : Автор(ы): K. Reid and J.P. Croxall (United Kingdom)
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Revised research plan for toothfish in Division 58.4.4 b by Shinsei maru No. 3 in 2014/15
blocks C and D using CPUE analogy method, Petersen method and CASAL model, although the data of current ... season has not been validated and not used for the present analysis. We used updated reference area size ... for the CPUE method and altered natural mortality for the Petersen and CASAL methods. Detailed results ... using CASAL models in research block C are described in a separated document. The estimated stock size ...
Meeting Document : WG-FSA-14/21 : Автор(ы): Delegation of Japan
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New Zealand-Australia Antarctic Ecosystems Voyage
Abstract: RV Tangaroa carried out a 42-day research voyage to the Ross Sea from 29 January to 11 ... March 2015. The main purpose of the New Zealand-Australia Antarctic Ecosystems Voyage (TAN1502) was to ... undertake ecological studies of Ross Sea marine foodwebs of importance to top predators. The work was ... centred on the feeding areas of cetaceans, primarily blue whales and humpback whales, and in the Ross Sea ...
Meeting Document : WG-EMM-15/56 : Автор(ы): R.L. O’Driscoll (New Zealand)
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Domain 1 MPA designation process: data sharing and future enhanced work
Abstract: During the last years, a large amount of information was gathered and shared in one ... unique project for the development of a representative system of MPAs in Domain 1. This process ... integrates, compiles, analyses and exposes a large amount of information, not only contributing to the best ... science available but also providing a platform for the sharing and visualization of information, further ...
Meeting Document : WG-EMM-16/73 : Автор(ы): M. Santos, A. Capurro and C.A. Cárdenas
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Sources of variability associated with Adélie penguin CEMP parameters measured at Béchervaise Island, East Antarctica
Abstract: We examine the magnitude of a variety of sources of variability associated with CEMP ... parameters. The CEMP parameters considered in this paper include: A3: breeding population size, A1: arrival ... be considered as either sampling variance or process related variance, although sometimes the two can ... be confounded. Temporal variability, that is the between-season variability, was consistent across ...
Meeting Document : WG-EMM-03/48 : Автор(ы): L.M. Emmerson, C. Southwell, J. Clarke and K. Kerry (Australia)
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