Résultats de la recherche
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Is population structure of Patagonian toothfish (Dissostichus eleginoides) determined by the Antarctic Circumpolar Current?
off the southern South American continent around the Falkland Islands north of the Sub-Antarctic Front ... of the ACC, and off Kerguelen and South Georgia Islands, situated respectively in the southern Indian ... and Atlantic Oceans to the south of the Polar Front. We fitted von Bertalanffy (VB) models ... evidence suggests that, consistent with the dynamic-physical structure of the ACC, toothfish off the ...
Meeting Document : WG-FSA-03/84 : Auteur(s): J.R. Ashford, C.M. Jones, E. Hofmann (USA), I. Everson (United Kingdom) and G. Duhamel (France)
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Variation in echosounder calibration with temperature and some possible implications for acoustic surveys of krill biomass
Abstract: Accurate estimation of krill biomass by acoustic techniques is dependant upon a number ... of factors including, fundamentally, accurate echo-sounder calibration. The Simrad EK500 scientific ... calibration parameters were to be employed on survey around South Georgia, and no account were taken of the ... in turn to an under-estimation of krill biomass by 52.5 %. Every effort should therefore be made to ...
Meeting Document : WG-EMM-97/52 : Auteur(s): Watkins, J.L., Woodroffe, P., Brierley, A.S., Goss, C.
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Estimation of chlorophyll distributions obtained from satellite images (Nimbus-7/CZCS) in the Antarctic Ocean
{Coastal Zone Color Scanner) could be related to distribution of phytoplankton pigment (Chlorophyll-a ... + pheopigments) concentrations. CZCS data from polar regions have been utilized only a limited number because of ... constraints. This papar discusses the characterization of phytoplankton pigment concentrations. Author(s): N ... . Kimura, Y. Okada, S. Matsumura and Y. Sugimori (Japan) Title: Estimation of chlorophyll distributions ...
Meeting Document : WG-KRILL-93/39 : Auteur(s): N. Kimura, Y. Okada, S. Matsumura and Y. Sugimori (Japan)
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Food and feeding of the mackerel icefish (Champsocephalus gunnari) around South Georgia in January/February 1991
Abstract: The diet composition and feeding intensity of mackerel ice fish (Champsocephalus ... stations. Both, the proportion of krill (Euphausia superba) in the stomachs and the feeding intensity were ... uncommonly low in a period when energy-rich food is needed for the final maturation of the gonads. Author(s ... . Szlakowski (Poland) Title: Food and feeding of the mackerel icefish (Champsocephalus gunnari) around South ...
Meeting Document : WG-FSA-91/29 : Auteur(s): K.-H. Kock (Germany), I. Everson, S. Campbell and G. Parkes (United Kingdom), D. Cielniaszek and J. Szlakowski (Poland)
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The population of Mirounga leonina at stranger point (25 de Mayo – King George I.)
Abstract: This paper includes information on the trend of the elephant seal population at ... male component was affected in 1987 (r=-0.463). A possible influence of El Niño Southern Oscillation ... of Argentina Title: The population of Mirounga leonina at stranger point (25 de Mayo – King George I ...
Meeting Document : SC-CAMLR-VII/BG/33 : Auteur(s): Delegation of Argentina
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A customised Marine Spatial Planning tool in Arc-GIS to facilitate development and evaluation of Marine Protected Area scenarios in the CCAMLR Area
Abstract: We describe the use of a GIS-based Marine Spatial Planning (MSP) tool designed to aid ... the development and transparent evaluation of MPA scenarios with reference to spatially explicit ... framework. The MSP tool has been customised to enable rapid set-up and use in any of the nine CCAMLR MPA ... Planning tool in Arc-GIS to facilitate development and evaluation of Marine Protected Area scenarios in the ...
Meeting Document : WG-EMM-12/56 : Auteur(s): B.R. Sharp and K. Ollivier (New Zealand)
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Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983–2010
closed this fishery in 1990. We report changes in size and abundance of the commercially exploited ... during preceding years. Modal age changed from 2-3 to 6-7 yr. Length data of G. gibberifrons, available ... from 1986, exhibited a similar pattern, showing a decrease until 1991-92. After a period of relative ... low recruitment. The length-frequency distribution of unexploited N. coriiceps throughout the whole ...
Meeting Document : WG-FSA-12/P01 : Auteur(s): E.R. Marschoff, E.R. Barrera-Oro, N.S. Alescio and D.G. Ainley
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Abundance estimation of Adélie penguins colony at Esperanza/Hope Bay
Abstract: We conducted a whole-colony census of the Adélie penguin colony at Esperanza/ Hope Bay ... , similar to what has been observed in other colonies throughout the WAP. The assessment of this population ... will contribute to the estimate of total predator biomass in Area 48. Author(s): M.M. Santos, N.R ... . Coria, E. Barrera-Oro (Argentina) and J.T. Hinke (USA) Title: Abundance estimation of Adélie penguins ...
Meeting Document : WG-EMM-13/43 : Auteur(s): M.M. Santos, N.R. Coria, E. Barrera-Oro (Argentina) and J.T. Hinke (USA)
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Research program on resource potential and life cycle of Dissostichus species from the Subarea 88.2 A in 2014–2017
. The main objectives are studying of toothfish migration from SSRU 88.1 K to Subarea 88.2 A. The survey ... program was improved in accordance with recommendations of WG-SAM-2014 and intercessional work with CCAMLR ... research program in the Ross Sea – Subarea 88.2. Author(s): Delegation of the Russian Federation Title ... : Research program on resource potential and life cycle of Dissostichus species from the Subarea 88.2 A in ...
Meeting Document : WG-FSA-14/13 : Auteur(s): Delegation of the Russian Federation
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Progress towards an assessment of Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRUs 882C–H for the years 2002–03 to 2015–16 using a two-area model
(SSRUs 88.2C–G) comprising a mix of large mature fish and small immature fish. Two-area stock assessment ... collect mark-recapture data in the South to help inform the estimation of biomass in the South. We present ... an update on these two-area stock models, which include two years of new data collected under a ... the model, and in particular the size of the fish population in the South. We recommend that the ...
Meeting Document : WG-FSA-16/44 : Auteur(s): S. Mormede, K. Large and S. Hanchet