Search results
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On the possibility of practical utilisation of krill target strength TS in situ obtained on the basis of EK-500 measurements
Abstract: Comparative analysis of krill length distribution in the echosurvey area, obtained with ... trawl and acoustic methods is presented. Besides, the acoustic estimate of krill length composition was ... obtained on the basis of the empiric model by Greene et al. (1991) using estimates of target strength in ... situ at the frequency of 120 kHz as measured with echosounder EK-500 (split-beam) principle). Krill was ...
Meeting Document : WG-EMM-98/19 : Author(s): S.M. Kasatkina (Russia)
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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 : Author(s): T.A. Klevjer, O.R. Godø and B. Krafft (Norway)
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Report of the SC-CAMLR Observer (Japan) to the Fourth Meeting of the Scientific Committee of the Southern Indian Ocean Fisheries Agreement (SIOFA) (Yokohama, Japan, 25 to 29 March 2019)
Abstract: The Fourth Meeting of the Scientific Committee (SC4) of the Southern Indian Ocean ... Fisheries Agreement (SIOFA) was held at the National Institute of Fisheries Science, in Yokohama, Japan from ... the CCAMLR Secretariat’s Science Manager attended at the invitation of the Executive Secretary of ... SIOFA, Jon Lansley, as part of the ongoing development of collaboration between CCAMLR and SIOFA. The ...
Meeting Document : SC-CAMLR-38/BG/12 : Author(s): SC-CAMLR Observer (Japan)
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Comparison of the catches and biological characteristics of Dissostichus mawsoni in Subarea 88.1 in seasons of 2002/03 and 2003/04
Abstract: This report presents results of an exploratory fishery for Antarctic toothfish (D ... . mawsoni) conducted by the Russian vessels “Yantar” and “Volna” for two seasons of 2002/03 and 2003/04. The ... analysis of data collected relates to catch composition, effort, CPUE, and biological characteristics in ... different SSRU, month and depth of sets longlines. The comparison of these resultants showed that in the ...
Meeting Document : WG-FSA-04/84 Rev. 1 : Author(s): K.V. Shust, N.V. Kokorin and A.F. Petrov (Russia)
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Summary of a three year mark-recapture experiment to estimate population size of Antarctic toothfish (Dissostichus mawsoni) in Southern Area of Statistical Subarea 48.4
the aims of providing the data required for assessments of the population structure, size, movement ... and growth of both Patagonian toothfish (Dissostichus eleginoides) and Antarctic tooth (Dissostichus ... mawsoni) in South of Statistical Subarea 48.4. This paper presents the results for D. mawsoni. Fishing ... effort within the south of Subarea 48.4 was relatively evenly spread between each participating fishing ...
Meeting Document : WG-FSA-11/31 Rev. 2 : Author(s): R.C. Wakeford, J. Roberts and R.E. Mitchell (United Kingdom)
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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 : Author(s): 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 : Author(s): K.G. Foote and G. Stefánsson (Norway)
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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 ... . There is now extensive evidence that there are years when there is a very low abundance of Antarctic ... krill (Euphausia superba) in the South Georgia area, and that the variation affects much of the ...
Meeting Document : WS-AREA 48-98/8 : Author(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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Report of the 1st and the 2nd stage of research fishing conducted by Russian Federation in SSRU 882A in 2010–2012 (this is a revision of WG-SAM-12/08)
Abstract: In accordance with decision of CCAMLR Scientific Committee in 2010 and in 2011 years ... Russian vessel “Chio Maru 3” (“Antei” Ltd.) has been conducted research fishing of toothfish. The primary ... objective of the works in the SSRU was estimation of toothfish`s distribution density and carrying out of ... biomass of toothfish in SSRU 88.2 A in significant and makes up from 2611.3 to 3112.3 t, which allows the ...
Meeting Document : WG-FSA-12/15 : Author(s): E.F. Kulish and I.I. Gordeev (Russia)
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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 : Author(s): A.K. Zaytsev (Ukraine)