Résultats de la recherche
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Progress towards a trophic model of the ecosystem of the Ross Sea, Antarctica, for investigating effects of the Antarctic toothfish fishery
Abstract: We report on the further development of a carbon-budget trophic-model of the Ross Sea ... with which to investigate effects of the fishery for Antarctic toothfish (Dissostichus mawsoni). The ... relative absence of krill, Antarctic silverfish (Pleuragramma antarctica) are probably the major middle ... considered a work in progress. Overall, the model is close to balance, with total exports of organic carbon ...
Meeting Document : WG-EMM-06/14 : Auteur(s): M. Pinkerton, S. Hanchet and J. Bradford-Grieve (New Zealand)
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Variation of ice edge position in western part of Atlantic sector of the Antarctic
Abstract: Satellite imagery of the pack ice edge position in western part of the Atlantic sector ... of the Antarctic derived on each tenday period basis has been used to analyse its spatial and ... temporal variation in the area between 65° and 20°W. Amplitude of the seasonal variation of the ice edge ... position was found to increase from the west to the east. Described is two-year cyclicity of consecutive ...
Meeting Document : SC-CAMLR-VIII/BG/49 : Auteur(s): Delegation of USSR
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Using vessel acoustics to detect diving patterns of krill foraging predators automatically: Development of a novel method for quantifying impact of krill fishing on seals and penguins
Abstract: The aim of this work was to assess the possibilities of automatically generating a ... dataset of dive behaviour of air-breathing predators, based on acoustic data from a monitoring survey and ... from commercial krill fishing operations. Our results documents that some form of automatic detection ... of diving predators in the data is feasible. A relatively low detection probability of our algorithms ...
Meeting Document : WG-EMM-15/25 : Auteur(s): T.A. Klevjer, O.R. Godø and B. Krafft (Norway)
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Hydroacoustic assessment of krill in Area 58 of the Indian Ocean sector of the Antarctic region
Abstract: On the basis of acoustically registered krill swarms along a 1097 nm transect in the ... area 58 of Indian Ocean Sector of Antarctic region, the biomass density of krill, their spatial and ... depth distribution are presented. The mean density of krill biomass between 60°00'S and 61°00' ... ; S parallels 34°00'E and 40°00'E meridian was recorded as 0.6t.km-2. Presence of krill was ...
Meeting Document : WG-EMM-98/36 : Auteur(s): Z. Klusek and A. Anrose (India)
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COMPARATIVE CHARACTERISTICS OF BASIC BIOLOGICAL PARAMETERS OF TWO TOOTHFISH SPECIES IN HIGH-LATITUDE SEAS OF THE ANTARCTIC
Abstract: Scientific data were obtained during the fishery cruise of Spanish long-liner «Tronio ... » in the areas of the Ross Sea and the Antarctic continental shelf (statistical subareas 88.1 and ... 58.4.1) outside the exclusive (marine) economic zones of foreign states, in the period from 5 November ... , 2007 till 24 March, 2008. In the paper size characteristics of Antarctic and Patagonian toothfishes ...
Meeting Document : WG-FSA-08/12 : Auteur(s): A.K. Zaytsev (Ukraine)
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INDICATIVE ESTIMATES OF BIOMASS AND YIELD OF WHITSON’S GRENADIER (M. WHITSONI) ON THE CONTINENTAL SLOPE OF THE ROSS SEA IN SUBAREAS 88.1 AND 88.2
being equal to 16% of the catch limit of Dissostichusspp. in these subareas. The 16% was based on the ... ratio of the by-catch limit for macrourids to the catch limit for Dissostichus spp. in Division 58.5.2 ... been based on the extrapolation of catch rates from a trawl survey of M. carinatus on Banzare Bank. Two ... bottom trawl surveys (IPY_CAML and BioRoss) have recently been carried out by New Zealand on parts of the ...
Meeting Document : WG-FSA-08/32 : Auteur(s): S.M. Hanchet, D. Fu and A. Dunn (New Zealand)
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Definition of the problem of estimating fish abundance over an area from acoustic line transect measurements of density
Abstract: The problem of acoustic abundance estimation is briefly reviewed. Under proper ... particular problem of estimating fish abundance over an area from line-transect measurements of fish density ... is defined. Related problems of estimating the variance of the abundance estimate and of mapping the ... spatial distribution are also defined. A partial list of candidate methods for solving the several ...
Meeting Document : WG-KRILL-91/08 : Auteur(s): K.G. Foote and G. Stefánsson (Norway)
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IMPLEMENTATION OF FOOSA (KPFM) IN THE EPOC MODELLING FRAMEWORK TO FACILITATE VALIDATION AND POSSIBLE EXTENSION OF MODELS USED IN EVALUATING KRILL FISHERY HARVEST STRATEGIES THAT WILL MINIMISE RISK OF LOCALISED IMPACTS ON KRILL PREDATORS
main parts – an outline of the structure of EPOC, consideration of the general FOOSA structure that ... needs to be implemented and a description of the implementation of FOOSA in EPOC. The latter section ... predators, the krill fishery and the system for setting catch limits. The process of implementing FOOSA in ... a minimal realistic model. A number of revised functions are developed as options to reflect ...
Meeting Document : WG-SAM-08/15 : Auteur(s): A. Constable (Australia)
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Testing the performance of a recompiled version of CMIX to decompose length-density distributions of Patagonian toothfish (Dissostichus eleginoides)
Abstract: A version of the mixture fitting program CMIX was recompiled to enable it to be run ... within the DOS emulator of recent versions of the Microsoft Windows operating system. The performance of ... the recompiled version was compared with that of the original version. The recompiled version of CMIX ... differences in the minimisation routines of the recompiled version. We conclude that the small differences ...
Meeting Document : WG-FSA-04/65 : Auteur(s): T.D. Lamb, W.K. de la Mare, A.J. Constable and C.R. Davies (Australia)
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Estimation of krill biomass from an acoustic survey carried out in 1986, during a study of predator–prey interactions around the western end of South Georgia
Abstract: An acoustic survey, designed to study the distribution of shore-breeding, marine ... predators and their pelagic prey, was carried out in 1986 around the western end of South Georgia. This ... paper describes how this acoustic data has been used to estimate krill biomass of part of the original ... survey area as part of an interannual study. The radiating transect design gave increased sampling ...
Meeting Document : WG-EMM-99/17 : Auteur(s): C. Goss and S. Grant (United Kingdom)