Résultats de la recherche
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Adélie penguin population change in the pacific sector of Antarctica: relation to sea-ice extent and the Antarctic Circumpolar Current
Abstract: One of the longest continuing data sets involving a marine organism in the Antarctic is ... that of annual estimates of breeding population size of Adélie penguins Pygoscelis adeliae at colonies ... on Ross Island, Ross Sea, 1959 to 1997. The sizes of these colonies have displayed significant ... physical environmental factors during that part of the record with comparable sea-ice satellite imagery ...
Meeting Document : WG-EMM-01/23 : Auteur(s): P.R. Wilson (New Zealand), D.G. Ainley, N. Nur, S.S. Jacobs (USA), K.J. Barton (New Zealand), G. Ballard and J.C. Comiso (USA)
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REPORT ON A RANDOM STRATIFIED TRAWL SURVEY TO ESTIMATE DISTRIBUTION AND ABUNDANCE OF DISSOSTICHUS ELEGINOIDES AND CHAMPSOCEPHALUS GUNNARI IN THE HEARD ISLAND REGION (DIVISION 58.5.2) FOR 2008 AND 2009
generally reduced from the previous year’s survey, with the catch of toothfish being one third of that for ... the previous year and those of grey rock cod, unicorn icefish and skate species down by half. Catches ... of mackerel icefish and macrourids were similar to the previous RSTS. One of the most notable ... features of the survey was the very large catch of jellyfish. In contrast, overall catches for the 2009 ...
Meeting Document : WG-FSA-09/34 : Auteur(s): G.B. Nowara (Australia)
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IMPACTS OF CLIMATE CHANGE ON ANTARCTIC MARINE ECOSYSTEMS: A CALL FOR ACTION
decade, but little in the way of policy or operational change has resulted at CCAMLR. Over the past 50 ... years major alterations of the ecological workings of the Southern Ocean have been underway. These ... Western Antarctic Peninsula has warmed more than four times faster than the average rate of Earth’s ... the distribution and abundance of those species whose natural history patterns are closely tied to sea ...
Meeting Document : CCAMLR-XXVII/BG/27 : Auteur(s): Submitted by ASOC
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TROPHIC OVERLAP OF WEDDELL SEALS (LEPTONYCHOTES WEDDELLI) AND ANTARCTIC TOOTHFISH (DISSOSTICHUS MAWSONI) IN THE ROSS SEA, ANTARCTICA
Abstract: We present information to investigate the significance of Antarctic toothfish as a prey ... item for Weddell seals in the Ross Sea. • We summarise the life history of Weddell seals to provide an ... overview of their use of the Ross Sea. As consumption of prey by Weddell seals (both the amount and type of ... prey) will vary between different life history stages at different times of the year in different areas ...
Meeting Document : WG-EMM-08/43 : Auteur(s): M.H. Pinkerton, A. Dunn and S.M. Hanchet (New Zealand)
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AN ECOSYSTEM-BASED MANAGEMENT PROCEDURE FOR KRILL FISHERIES: A METHOD FOR DETERMINING SPATIALLY-STRUCTURED CATCH LIMITS TO MANAGE RISK OF SIGNIFICANT LOCALISED FISHERIES IMPACTS ON PREDATORS.
single-species assessment of yield, and a method for implementing the procedure. The decision rule for ... setting catch limits for a given harvest strategy has a straight forward expression of the target ... of predator-prey dynamics beyond that evident in the data. It is a natural extension of the current ... precautionary approach of CCAMLR for krill and can utilise existing datasets, including B0 surveys, local scale ...
Meeting Document : WG-SAM-08/16 : Auteur(s): A. Constable and S. Candy (Australia)
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On selectivity of commercial and research trawls when krill catching
Abstract: In the paper the attempt was made to compare selective features of several midwater ... krill trawls within the frame of krill density precise estimates provision problem in echo-surveys. The ... results of fishing one krill aggregation with two types of trawls (PT 72/308 commercial trawl and Isaacs ... -Kidd research trawl IKTM) are presented. Selectivity differences of those trawls resulted in ...
Meeting Document : WG-EMM-96/34 : Auteur(s): Kasatkina, S.M.
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Fishes incidentally caught by Japanese Antarctic krill commercial fishery to the north of the South Shetland Islands during the 1994/95 austral summer
Abstract: Observations on abundance of by-catch fishes were made during the austral summer months ... of 1995 (from 30 January to 18 February) on board F/V Niitaka Maru to the north of the South Shetland ... Islands. Among 78 hauls examined, a total of 97 specimens of fishes belonging to five species, Electrona ... sample of 50 kg of krill. Number of by-catch fishes ranged from 0 to 50 per 100 kg of krill catch and ...
Meeting Document : WG-EMM-95/56 : Auteur(s): Iwami, T.
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Krill catches and consumption by land-based predators in relation to distance from colonies of penguins and seals in the South Shetlands and South Orkneys
Abstract: Zones of 20 km width are defined around selected colonies of penguins distributed ... around the coasts of the South Shetland and South Orkney Islands. Krill catches in these zones are shown ... , probably as a result of oceanographic conditions. About 50% of the catch in Subarea 48.1 from December to ... March was taken within 40 km of the coast, and 90% within 80 km in all years 1988-1990. In 1987 and 1988 ...
Meeting Document : SC-CAMLR-X/BG/07 : Auteur(s): Secretariat
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Krill catches and consumption by land-based predators in relation to distance from colonies of penguins and seals in the South Shetlands and South Orkneys, 1987-1990
Abstract: Zones of 20 km width are defined around selected colonies of penguins distributed ... around the coasts of the South Shetland and South Orkney islands. Krill catches in these zones are shown ... result of oceanographic conditions. About 50% of the catch in 48.1 from December to March was taken ... within 40 km of the coast, and 90% within 80 km in all years 1988-1990. In 1987 and 1988 75% of the catch ...
Meeting Document : WG-CEMP-91/25 : Auteur(s): D.J. Agnew (Secretariat)
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AMLR Hydroacoustic Survey System Description of Methods, A Case Study
Abstract: The AMLR hydroacoustic system used for surveys in the vicinity of Elephant Island and ... King George Island during 1987-1989 has hardware and software components. The method of analysis ... proceeds from the basic integration data (lm bins by 1min outputs) to the stratification of these data into ... blocks of area and finally a total estimate of abundance and statistical confidence limits about the ...
Meeting Document : WG-KRILL-89/10 : Auteur(s): M.C. Macaulay (USA)