Search results
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Migrations of Antarctic fish Pseudochaenichthys georgianus Norman, 1939 in the Scotia Sea
geographical and depth distribution of Pseudochaenichthys georgianus in the area of Scotia Arc Islands and on ... shelf of South Georgia Island. In the Antarctic colder waters in the Palmer Archipelago there were ... reason to follow after krill driven to the East to deep open Scotia Sea. In vast Antarctic Zone, enlarged ... not in sampled area, have to be assumed to be near or under ice feeding on juvenile krill and fish ...
Meeting Document : WG-FSA-12/68 Rev. 1 : Author(s): R. Traczyk (Poland)
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Further development of pairwise tag detection performance index and its application to the stock assessment of toothfish in the Ross Sea fishery
Abstract: Tag release and recapture data are used in integrated age-structured stock assessments ... of Antarctic toothfish (Dissostichus mawsoni) in Subareas 88.1 and 88.2 to determine abundance and ... ) could lead to an over-estimate of the stock biomass. In this paper we develop further an index of vessel ... subset of vessels for which there is confidence in their tag-recapture data. Finally, we apply these ...
Meeting Document : WG-SAM-13/34 : Author(s): S. Mormede (New Zealand)
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Seabird by-catch in the Patagonian toothfish longline fishery at the Prince Edward Islands: 1999–2000
sanctioned longline fishing for Patagonian toothfish Dissostichus eleginoides in the Exclusive Economic Zone ... sanctioned fishing trips. Fishing effort was 7.4 million hooks, a 45% increase on the number of hooks set in ... 0.036 birds per 1 000 hooks, more than double that reported in 1998/99, but still considerably less than ... that reported in either 1996/97 or 1997/98. The absolute number of birds killed increased more than ...
Meeting Document : WG-FSA-00/30 : Author(s): P. Ryan and B. Watkins (South Africa)
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A REVIEW OF BIAS AND UNCERTAINTY IN ANTARCTIC PACK-ICE SEAL ABUNDANCE ESTIMATES
groups, including abundance, trends in abundance, habitat utilisation, foraging and growth, this review ... of pack-ice seals focuses primarily on abundance and to a lesser extent trends in abundance. The ... encountered in the pack-ice and fast-ice surrounding Antarctica (crabeater seal Lobodon carcinophaga, Ross ... than 50 years from when pack-ice seal surveys were first undertaken and reported in the 1950s to the ...
Meeting Document : CCAMLR-IWC-WS-08/06 : Author(s): Steinhage, D., Bengtson, J., Blix, A.S., Bester, M., Boveng, P., Laake, J., Cameron, M., Nordøy, E., Forcada, J., Stewart, B., Southwell, C., Trathan, P., Rogers, T., Plotz, J., Bornemann, H.
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Species variability and population structure of Euphausiacea in Admiralty Bay (King George Island; South Shetland Islands) during Antarctic summer
Abstract: The main component of zooplankton in Antarctic pelagic waters, apart from copepods or ... salps, are specimens representing euphausiids. In fjordic areas like Admiralty Bay, data concerning ... expedition to the H. Arctowski station in the Antarctic summer 2008-2009. Biological materials were collected ... in the central part of Admiralty Bay, in Ezcurra Inlet and in the smaller coves of the bay using the ...
Meeting Document : WG-EMM-14/60 : Author(s): A. Panasiuk-Chodnicka, J. Wawrzynek and M. Iwona Żmijewska (Poland)
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Environmental variability and the behavioural dynamics of Antarctic fur seals in the South Atlantic
Abstract: Variability in the reproductive performance of marine predators may be a result of ... to link variability in predator performance with specific measurements of oceanographic variability ... . This study examined variation in the foraging behavior of lactating Antarctic fur seals (Arctocephalus ... gazella) over 15 years at the island of South Georgia in relation to major indices of southern hemisphere ...
Meeting Document : WS-AREA 48-98/16 : Author(s): I.L. Boyd (UK)
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Descriptive analysis of the toothfish (Dissostichus spp.) tagging programme in Subareas 88.1 & 88.2 for the years 2000–01 to 2010–11
Abstract: Descriptive analyses of the toothfish tagging programme in Subareas 88.1 and 88.2 are ... recaptured since 2001. In recent years, most vessels have achieved or exceeded the target tagging rate of one ... toothfish per tonne of catch in the Ross Sea region. Tag recapture data showed that most fish are recorded ... one to SSRU 88.1I. In addition, several fish moved long distances on the slope and the shelf, with ...
Meeting Document : WG-FSA-11/46 : Author(s): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)
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MULTIPLE TIME SCALES OF VARIABILITY IN THE KRILL POPULATION AT SOUTH GEORGIA
ecosystem-based management of any krill fishery in the region. Krill acoustic density data from surveys ... conducted in the early, middle and late period of the summers of 2001 to 2005, together with krill ... dynamics model to evaluate potential mechanisms behind the observed changes in krill biomass. Krill ... abundance was highest during the middle of the summer in 3 years and in the late period in 2 years; in the ...
Meeting Document : WG-EMM-08/48 : Author(s): K. Reid, J. Watkins, E. Murphy, P. Trathan, S. Fielding and P. Enderlein (United Kingdom)
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The state of exploited fish stocks in the Atlantic sector of the Southern Ocean
of the 1960s mainly by the Soviet Union. Notothenia rossii marmorata,vas the target species in the first peak ... mainly by the Soviet Union. Notothenia rossii marmorata ,vas the target species in the first peak years ...
Meeting Document : SC-CAMLR-VIII/BG/18 : Author(s): Delegation of Federal Republic of Germany
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Variation in reproductive performance of seabirds and seals at South Georgia, 1976–1986 and its implications for southern ocean monitoring studies
Orkney Islands) are summarised and reviewed. Breeding success of the Wandering Albatross, which breeds in ... significantly. The other species at South Georgia, which breed in summer and for which krill forms a significant ... proportion of their diet, have shown major fluctuations in some or all of: breeding population size, breeding ... particularly poor reproductive performance by almost all species. Difficulties in provisioning offspring were ...
Meeting Document : SC-CAMLR-VI/BG/15 : Author(s): J.P. Croxall, T.S. McCann, P.A. Prince and P. Rothery (United Kingdom)