Résultats de la recherche
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On the intensity of sampling krill trawl catches
Abstract: This paper uses actual krill length frequency data in an attempt to address the problem ... (e.g. length-with-age). At present, and in the interests of both statistical rigour and the efficiency ... differences in length should be considered along with the need to collect maturity stage information. * For ...
Meeting Document : WG-KRILL-90/27 : Auteur(s): D.G.M. Miller (South Africa)
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Trophic niche of the Antarctic toothfish caught in SSRU 88.3 as inferred from fatty acids and stable isotopes
–2018, making comparisons with previous dataset obtained from the Ross Sea shelf (RSS) and the Indian ... of regional toothfish stocks, demonstrating an ontogenetic movement into deeper water from shelf ... descriptors for most trophic markers in toothfish, emphasizing both ontogenetic and geographical variability ... both trophic markers. Author(s): C.-K. Kang, S.-G. Choi, H.Y. Kang, Y.-J. Lee, S. Chung and D.H. An ...
Meeting Document : WG-FSA-18/21 : Auteur(s): C.-K. Kang, S.-G. Choi, H.Y. Kang, Y.-J. Lee, S. Chung and D.H. An
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NET-BASED VERIFICATION OF ACOUSTIC TECHNIQUES USED TO IDENTIFY ANTARCTIC KRILL
Abstract: We validate the acoustic target classification protocols developed for the Stochastic ... that were collected during two cruises to the South Georgia region in 1996. For each krill aggregation ... identification algorithms for krill: (i) ‘3 freq model’- using the SDWBA to set the acceptance windows for both ... Sv120-38 and Sv200-120, (ii) ‘2 freq model’- using the SDWBA to set the acceptance window for just Sv120 ...
Meeting Document : WG-EMM-08/54 : Auteur(s): J. Watkins and S. Fielding (United Kingdom)
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On the use of baited remote underwater video to study Antarctic toothfish distribution under the sea-ice: from data collection to processing
of predictive variables, including an approach to account for bias in counting the number of ... and Italy, from 2015 to 2018 a series of BRUV samplings have been carried out from the fast ice of ... refined, our hope is that it could provide a mechanism for other Members to extend the area of data ... : Content Approved Document Release Consent: No Delegation responsibility for releasing documents: Italy ...
Meeting Document : WG-EMM-2019/50 : Auteur(s): D. Di Blasi, S. Canese, E. Carlig, L. Ghigliotti, S.J. Parker and M. Vacchi
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ANALYSIS OF VARIABILITY OF KRILL SIZE AND FISH BY-CATCH IN JAPANESE KRILL FISHERY BASED ON SCIENTIFIC OBSERVER DATA
, subareas, and vessels. The potent interaction effect between year and subarea suggests large spatiotemporal ... formula with the variance terms derived from the Bayesian model. For both krill length and bycatch fish ... CV. The results of this study suggest that scientific data collectionby commercial fishery is an ... important source of information for the management of krill resources and Antarctic ecosystem, while ...
Meeting Document : WG-EMM-11/39 : Auteur(s): T. Okuda and M. Kiyota (Japan)
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Reports on abundance and biological information on toothfish in Division 58.4.4 a and b by Shinsei Maru No. 3 in 2010/11 season
Abstract: A survey was conducted in order to collect information for the stock status and various ... longline vessel, Shinsei Maru No. 3, from March 30 to May 2, 2011. The survey was undertaken according to ... 93.6 % to the total catch. CPUEs of D. eleginoides for 56 hauls where only trotline system was adopted ... size of fish was larger in the 2009/10. The maturity index Stage I (immature) was dominant for both ...
Meeting Document : WG-SAM-11/06 : Auteur(s): K.Taki, T. Iwami and M. Kiyota (Japan)
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Investigation of bias in the mark–recapture estimate of toothfish population size at South Georgia
magnitude of the estimated bias to correct the tagging estimate made last year for 48.3, we do conclude that ... model incorporates the facility for releases by box over a number of years. The model performed as ... uneven distribution of animals was simulated by adjusting an average movement rate downwards when animals ... expected with test situations. It produced a near-perfect estimate of stock size when there was an ideal ...
Meeting Document : WG-FSA-SAM-05/6 Rev. 1 : Auteur(s): D.J. Agnew, G.P. Kirkwood, J. Pearce and J. Clark (United Kingdom)
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Preliminary report of outcomes of the 2nd international workshop on the ICED Southern Ocean Sentinel, held in Hobart Australia 7–11 May 2012
benchmarking Southern Ocean ecosystems in 2020 and for establishing routine activities for estimating change in ... the discussion on strategies for measuring change in Southern Ocean marine ecosystems, including ship ... -based and land-based monitoring and integrated studies. The workshop agreed a work plan for ... important for CCAMLR in measuring the status and trends of Southern Ocean ecosystems, particularly in ...
Meeting Document : WG-EMM-12/59 : Auteur(s): A. Constable (Australia)
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Analysis of the krill fishery in Subarea 48.1 considering trawl fishing method used (2010–2016)
Abstract: An analysis of spatio-temporal variability of CPUE indices in the krill fishery in ... using the standardized CPUE indices as krill biomass density indices for monitoring the variability of ... biomass during the fishing season did not decrease and even often increased there. The latter is an ... Secretariat Workflow Status: Content Approved Delegation responsibility for releasing documents: Russian ...
Meeting Document : WG-EMM-17/27 : Auteur(s): S. Kasatkina S. and L. Boronina
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Distribution and abundance of skates (Bathyraja spp.) on the Kerguelen Plateau through the lens of the toothfish fisheries
the southern Indian Ocean. Data from fishery observations for 1997 to 2014 shows that the three skates ... , appear to provide effective protection for the skates, at least in the shallower waters where the trawl ... Kerguelen in the time period. This study provides the first review of skate by-catch across both the HIMI ... to determine the important life history parameters of these species are required, particularly for B ...
Meeting Document : WG-FSA-16/P03 : Auteur(s): G.B. Nowara, P. Burch, N. Gasco, D.C. Welsford, T.D. Lamb, C. Chazeau, G. Duhamel, P. Pruvost, S. Wotherspoon and S.G. Candy