Resultados de la búsqueda
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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 : Autor(es): 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 : Autor(es): Z. Klusek and A. Anrose (India)
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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 : Autor(es): K.G. Foote and G. Stefánsson (Norway)
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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 : Autor(es): A.K. Zaytsev (Ukraine)
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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 : Autor(es): A. Constable (Australia)
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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 : Autor(es): S.M. Hanchet, D. Fu and A. Dunn (New Zealand)
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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 : Autor(es): T.D. Lamb, W.K. de la Mare, A.J. Constable and C.R. Davies (Australia)
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On necessity of longline fishery and research of Antarctic toothfish in all SSRUs of Subareas and Divisions 88.1, 88.2, 58.4.1, 58.4.2
Abstract: The analysis of catch size composition, statistical data on catches and distribution of ... Antarctic tooth-fish, and tagging data showed that the existing system of fishing subarea partition into ... SSRUs, open and closed for fishery, resulted in a lack of overall picture of population structure state ... of toothfish migrations by tagging results. The mentioned system shortcomings require its revision ...
Meeting Document : WG-FSA-10/36 : Autor(es): K.V. Shust, A.F. Petrov, V.A. Tatarnikov and I.G. Istomin (Russia)
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Scientific background document in support of the development of a CCAMLR MPA in the Weddell Sea (Antarctica) – Version 2015 - Part B: Description of available spatial data
justification for the development of a marine protected area (MPA) in the Weddell Sea planning area. In ... documents (Part A-C). SC-CAMLR-XXXIV/BG/15 (Part A) sets out the general context of the establishment of ... the means and the results of the scientific analyses and the development of objectives and priority ... areas for a Weddell Sea MPA. Here, the delegation of Germany intends to update the Scientific Committee ...
Meeting Document : SC-CAMLR-XXXIV/BG/16 : Autor(es): Delegation of Germany
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Comparison of long-term trends in abundance, recruitment and reproductive success of five populations of Pygoscelis penguins in the South Shetland Islands, Antarctica
Abstract: Responses of predator populations to environmental variability in the Antarctic have ... predator life-history strategies. Five populations of Pygoscelis penguins from King George Island and ... Livingston Island, South Shetland Islands, Antarctica, were examined to compare up to 25 years of data on the ... responses of sympatric congeners to recent changes in their Antarctic ecosystem. We used simple linear ...
Meeting Document : WG-EMM-06/21 : Autor(es): J.T. Hinke (USA), K. Salwicka (Poland), S.G. Trivelpiece, G.M. Watters and W.Z. Trivelpiece (USA)