Résultats de la recherche
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Results of an acoustic investigation of Antarctic krill, Euphausia superba, biomass-density in the Elephant Island area in January/February 2001
Abstract: Results from an acoustic krill survey in the Elephant Island Area carried out Jan 27th ... installed on the R/V “Polarstern”. The collected acoustic data were post-stratified in three strata based on ... demographic results obtained by net sampling. Data files from the 38 kHz and 120 kHz recordings were prepared ... and processed according to protocols used for the CCAMLR 2000 Synoptic Survey. An average biomass ...
Meeting Document : WG-EMM-02/30 : Auteur(s): M.A. Thomasson (Sweden), J.H. Emery (USA), J. Rademan (South Africa), R.P. Hewitt (USA) and B.I. Bergström (Sweden)
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An investigation of avoidance by Antarctic krill of RRS James Clark Ross using the Autosub-2 autonomous underwater vehicle
Abstract: The autonomous underwater vehicle (AUV) Autosub-2 was deployed on eight missions ahead ... of RRS James Clark Ross in the northern Weddell Sea and in the Bransfield Strait to assess avoidance ... of the research vessel by Antarctic krill Euphausia superba. The AUV was equipped with the same type ... of scientific echosounder as the research vessel (Simrad EK500 operating at 38 kHz and 120 kHz) and ...
Meeting Document : WG-EMM-01/14 : Auteur(s): A.S. Brierley, P.G. Fernandes, M.A. Brandon, E. Armstrong, D.G. Bone and the Autosub Team (United Kingdom)
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Exploitation of mesoscale oceanographic features by grey-headed albatross Thalassarche chrysostoma in the southern Indian Ocean
association with mesoscale oceanographic features, as identified by sea surface height anomalies, in the ... southern Indian Ocean. During incubation, most birds foraged to the north of the island, at the edges of ... anomalies created by the Agulhas Return Current in the Subtropical Convergence and the Subantarctic zones ... . In contrast, during chick-rearing all tracked birds foraged to the southwest of the island, at the ...
Meeting Document : WG-FSA-01/12 : Auteur(s): D.C. Nel, J.R.E. Lutjeharms, E.A. Pakhomov, I.J. Ansorge, P.G. Ryan and N.T.W. Klages (South Africa)
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Assessment of yield and status of Macrourus carinatus on BANZARE Bank in the southern Indian Ocean: implications for managing by-catch in CCAMLR fisheries
Abstract: This paper assesses the status and abundance of M. carinatus on BANZARE Bank ... (Statistical Division 58.4.3/1). The long-term precautionary yield was estimated using the Generalised Yield ... Model (GYM) used previously by the CCAMLR Working Group on Fish Stock Assessment. Estimates of ... directly available for M. carinatus, estimates were obtained from the literature for similar species ...
Meeting Document : WG-FSA-99/69 : Auteur(s): E.M. van Wijk, A.J. Constable, R. Williams and T. Lamb (Australia)
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Revised proposal for a CCAMLR sponsored research survey to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea
Abstract: At its 2010 meeting, the Scientific Committee agreed that a time series of recruitments ... from a well- designed survey in the Ross Sea could be a useful input into the stock assessment model ... survey was presented to the 2011 meeting of WG-SAM. In this paper we provide an update of the preliminary ... proposal by taking into account the comments of WG-SAM. It provides the scientific rationale and background ...
Meeting Document : WG-FSA-11/47 : Auteur(s): S.M. Hanchet, S. Mormede, S.J. Parker and A. Dunn (New Zealand)
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Proposal for an extension to the mark recapture experiment to estimate toothfish population size in Subarea 48.4
and 25 tagged fish have been recaptured, including 23 during the latest season. 2. A preliminary ... assessment of D. eleginoides stock size in the Northern Area of 48.4 estimates a vulnerable biomass of ... between 1,000 to 2,000 tonnes. 3. The UK proposes to continue the mark-recapture experiment in Subarea ... 48.4 in the 2008/09 fishing season so as to allow for a full assessment of D. eleginoides stock size in ...
Meeting Document : WG-FSA-08/46 : Auteur(s): J. Roberts and D. J. Agnew (UK)
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Swimming speed and allocation of time during the dive cycle of Antarctic fur seals
Abstract: During sustained bouts of diving, predators like fur seals may adjust the time they ... spend diving to maximise the time they can spend foraging and minimise the time spent at the surface ... between dives. To examine this, swimming speeds and the time allocated to different parts of the dive ... than was exhibited by animals when swimming at the surface. Swimming speeds were fastest during the ...
Meeting Document : WG-EMM-95/25 : Auteur(s): Bevan, R.M., Boyd, I.L., Reid, K.
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Climate variability in the western Antarctic peninsula region
Abstract: The climate of tile Western Antarctic Peninsula (WAP) region is distinguished by large ... seasonal and interannual variability and by the occurrence of seasonal sea ice which changes the ocean ... -atmosphere interface, affects tile surface albedo, and modifies the annual temperature cycle. Air temperature ... records for several peninsula stations have been examined, and the annual progression of surface air ...
Meeting Document : WG-EMM-95/61 : Auteur(s): Stammerjohn, S.E., Baker, K.S., Smith, R.C.
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Report on fishery and scientific activity of Ukraine in the Antarctic in 1993/94
Abstract: In the season of 1993-1994 Ukrainian fishing fleet conducted fisheries in two areas of ... Antarctic waters of the World Ocean: in the Atlantic (subareas 48.2 and 48.3) and the Indian (zone of the ... 1993. It was conducted by two vessels: BAT GRIGORY KOVTUN and RKTS GENERAL PETROV. The first one worked ... in subarea 48.2 from 01.03.1994 to 10.04.1994 and from the middle of the second ten-day period of May ...
Meeting Document : SC-CAMLR-XIII/BG/12 : Auteur(s): Observer (Ukraine)
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Krill (Euphausia superba) distribution in relation to water movement and phytoplankton distribution off the northern South Shetland Islands
Abstract: The waters in the vicinity of the South Shetland Islands and Elephant Island were ... surveyed to investigate mechanisms for the formation of krill concentrations and to estimate acoustic ... biomass of krill in the 1990/91 austral summer. Main krill concentrations occurred in the shelf waters ... north of the islands, as usual. Tracks of drifting buoys (with curtain drogues at 30 m depth where krill ...
Meeting Document : WG-KRILL-91/22 : Auteur(s): Delegation of Japan