Résultats de la recherche
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Demographic studies of Antarctic krill Euphausia superba Dana in the Cooperation and Cosmonaut Seas (Indian sector of the Southern Ocean)
Abstract: The reproductive state and size composition of Euphausia superba collected in the ... Indian sector of the Southern Ocean from 1985 to 1990 were analyzed to estimate its growth, life span and ... mortality rates. The duration of the life cycle of E.superba exceeded 5 years in the Cosmonaut Sea and 6 ... years in the Cooperation Sea. Assuming growth for only 180 days per year, growth rates ranged from 0.120 ...
Meeting Document : WG-Krill-94/16 : Auteur(s): E.A. Pakhomov (Ukraine)
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Dense populations of the Antarctic scallop (Adamussium colbecki) in Terra Nova Bay (Subarea 88.1J): potential VMEs adjacent to the Terra Nova Bay ASPA (No. 161)
Abstract: Benthic communities of the Terra Nova Bay area (Ross Sea) close to the Italian station ... Mario Zucchelli is located, have been largely investigated in the last couple of decades. All the ... acquired knowledge supports the presence of very rich and diversified communities. This has led to the ... establishment of an ASPA (N° 161). The Antarctic scallop, Adamussium colbecki (Smith, 1902), is one of the most ...
Meeting Document : WG-EMM-12/23 : Auteur(s): M. Chiantore and M. Vacchi (Italy)
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Dynamic of the krill fishery in the Area 48 and its relation to climate variability and changes in fishing technology
Abstract: The authors analyzed the spatial-temporal structure of standardized indices of catch ... per effort unit (CPUE) of Antarctic krill fishery in the Area 48 in relation to dynamic of ААО ... indices (Antarctic Oscillation Index) as one of the factors used in analysis of inter-annual and long ... -period fluctuations of hydrometeorological conditions at high latitudes of the southern hemisphere ...
Meeting Document : WG-EMM-13/25 : Auteur(s): P.S. Gasyukov and S.М Kаsatkina (Russia)
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Some characteristics of krill transport in the Scotia Sea based on the Russian survey data
Abstract: In this work the characteristics of krill transport across the SSMUs determined on the ... based on the long-term data from 3012 stations and respective time intervals when the water mass in the ... study area was totally replaced are presented. It is shown that in SSMUs the multiple total replacement ... be accompanied with krill biomass transport across the boundaries of the SSMUs. Our estimates of ...
Meeting Document : WG-EMM-05/41 : Auteur(s): S.M. Kasatkina, V.N. Shnar and O.V. Berezhinsky (Russia)
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Modelling the predator–prey interactions of krill, baleen whales and seals in the Antarctic ecosystem
Abstract: The history of human harvests of seals, whales, fish and krill in the Antarctic is ... summarized briefly, and the central role played by krill emphasized. The background to the hypothesis of a ... krill surplus in the mid 20th Century is described, and the information on population and trend levels ... that has become available since the postulate was first advanced is discussed. The objective of the ...
Meeting Document : WG-EMM-05/34 : Auteur(s): M. Mori and D.S. Butterworth (South Africa)
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Distribution and size of Antarctic krill (Euphausia superba Dana) in the Polish commercial catches in the Atlantic sector of Antarctica in 1997–1999
Abstract: The distribution, density and length composition of krill in commercial concentrations ... were investigated in the regions of South Shetland, Elephant, South Georgia and South Orkneys in spring ... and summer 1997-1999. The concentration densities varied with area and season. The densest ... during the day. Between February and April the concentration density increased, and in May and June it ...
Meeting Document : WG-EMM-01/13 : Auteur(s): E. Jackowski (Poland)
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Interannual variability of the South Georgia marine ecosystem: biological and physical sources of variation in the abundance of krill
Abstract: Interannual variability is a characteristic feature of the Southern Ocean ecosystem yet ... the relative roles of biological and physical processes in generating these fluctuations are unknown ... krill (Euphausia superba) in the South Georgia area, and that the variation affects much of the ... ecosystem with the most obvious impacts on survival and breeding success of some of the major krill ...
Meeting Document : WS-AREA 48-98/8 : Auteur(s): E.J. Murphy, J.L. Watkins, K. Reid, P.N. Trathan, I. Everson, J.P. Croxall, J. Priddle, M.A. Brandon, A.S. Brierley (UK) and E. Hofman (USA)
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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 ... physical forcing by large-scale oceanographic variability. Time lags, remoteness from the epicentre of a ... physical process and the simultaneous action of multiple physical processes often mean that it is difficult ... . This study examined variation in the foraging behavior of lactating Antarctic fur seals (Arctocephalus ...
Meeting Document : WS-AREA 48-98/16 : Auteur(s): I.L. Boyd (UK)
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OTOLITH-BASED AGEING OF THE PATAGONIAN TOOTHFISH (DISSOSTICHUS ELEGINOIDES) FOR THE HEARD AND MCDONALD ISLANDS: MODELLING FIXED AND RANDOM READER ERROR USING MULTIPLE READINGS OF A REFERENCE COLLECTION
calibration require an ageing error matrix as input in order to adequately account for uncertainty in the data ... resulting from the imprecision of age determination using annual ring counts from otoliths. This paper ... describes the methods and results used to provide an ageing error matrix to the HIMI toothfish integrated ... assessment using repeat readings by 4 readers of a set of 203 reference otoliths sampled from the HIMI ...
Meeting Document : WG-FSA-09/21 : Auteur(s): S.G. Candy, G.B. Nowara, D.C. Welsford and J.P. McKinlay (Australia)
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THE HISTOLOGICAL ANALYSIS OF OOGENESIS AND MATURITY OF ANTARCTIC TOOTHFISH FROM THE ROSS SEA
Abstract: The results of the histological analysis of the Antarctic toothfish (Dissostichus ... mawsoni) reproductive system, caught in December- February 2005/2006 in the Ross Sea are presented. The ... morphological parameters, indices of gonads and condition by Fulton have been described. The histological ... criteria of the assessment of the ovary maturity stages, cytological parameters of oocytes and type of the ...
Meeting Document : WG-FSA-09/26 : Auteur(s): S.V. Piyanova and A.F. Petrov (Russia)