Search results
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Change-in-ratio and index-removal methods for population assessment and their application to snow crab (Chionoecetes opilio)
Abstract: Change-in-ratio and index-removal estimators are presented in a general form suitable ... for fisheries studies. We also show how to combine the two approaches in a single estimator. It is ... composition, in order to use these methods. We use the methods to estimate the population of legal-size snow ... crabs (Chionoecetes opillio) in St. Mary's Bay, Newfoundland, before and after the fishery, and to ...
Meeting Document : WS-CRAB-93/10 : Author(s): X. Xu, E.G. Dawe and J.M. Hoenig (USA)
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Analysis of operating conditions of the fishing vessel in relation to the distribution, biological state and behaviour of Antarctic krill (a contribution to the development of a simulation model)
processing vessel producting krill meat. The vessel operated in the Commonwealth Sea, the Cosmonaut Sea and ... in twi Scotia Sea areas (off South Orkneys and off South Georgia) from February to June 1988. In all ... cause was tthe size composition of krill in the catches. Preference was given to larger krill. The ... density of krill in aggragtions usually remained at a high level and was a less important cause of area ...
Meeting Document : SC-CAMLR-VIII/BG/23 : Author(s): Delegation of USSR
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Recent trends in numbers of Crozet shags breeding at the Prince Edward Islands
decreased by more than 70% from 840 pairs in 1994/95 to 220 pairs in 2003/04 and then increased to some 500 ... pairs in 2008/09. The trends are thought to have been influenced by breeding success, which averaged ... were similar trends in numbers breeding and breeding success of gentoo penguins Pygoscelis papua, which ... doubled between the summers of 2001/02 and 2008/09. In 2008/09, some 600 pairs of Crozet shags were ...
Meeting Document : WG-EMM-10/P02 : Author(s): R.J.M. Crawford, P.G. Ryan, B.M. Dyer and L. Upfold
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Assignment of research catch limits for effort-limited research proposals in fisheries with pre-existing non-zero catch limits
, deducting research catch limits can result in forgone catch for other vessels participating in the Olympic ... -limited research proposals under CM 24-01 may be calculated in a transparent manner. Deviations between ... in the following year, to ensure that survey objectives are not compromised while simultaneously ... ensuring that other vessels operating in the same fishery are not disadvantaged and continue to prioritise ...
Meeting Document : SC-CAMLR-XXXIII/09 : Author(s): Delegation of New Zealand
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Fishery selection for Patagonian toothfish in CCAMLR Subarea 48.3, asymptotic or dome shaped?
Abstract: Characterisation of fishery selection is key to reducing uncertainty in the ... waters as they age and increase in size and, in combination with the practical difficulties associated ... Patagonian toothfish (D. eleginoides) in Subarea 48.3 is used to determine whether there is sufficient ... age with depth, is suggested as an indicator that a dome selection pattern is unlikely in the 48.3 ...
Meeting Document : WG-SAM-15/29 : Author(s): C. Darby, V. Laptikhovsky and M. Soeffker (United Kingdom)
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Research program on Dissostichus spp. in Divisions 58.4.1 and 58.4.2 from 2019/20 to 2021/22
Abstract: The Scientific Committee considered the assessment of Dissostichus spp. in data-poor ... types for the implementation of a multi-Member research on Dissostichus spp. in East Antarctica ... (Divisions 58.4.1 and 58.4.2) carried out in the seasons 2011/12- 2017/18 is a critical factor for their ... efficiency and reliability. In the context of the discussion of the Scientific Committee (SC-CAMLR-XXXVII p ...
Meeting Document : WG-SAM-2019/19 : Author(s): Delegation of the Russian Federation
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Proposal for multi-Member research on Dissostichus spp. in Divisions 58.4.1 and 58.4.2 from 2019/20 to 2021/22
Abstract: The Scientific Committee considered the assessment of Dissostichus spp. in data-poor ... types for the implementation of a multi-Member research on Dissostichus spp. in East Antarctica ... (Divisions 58.4.1 and 58.4.2) carried out in the seasons 2011/12- 2017/18 is a critical factor for their ... efficiency and reliability. In the context of the discussion of the Scientific Committee (SC-CAMLR-XXXVII p ...
Meeting Document : WG-FSA-2019/52 : Author(s): Delegation of the Russian Federation
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Geographical differences in the condition, reproductive development, sex ratio, and length distribution of Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica (CCAMLR Statistical Subarea 88.1)
differences in a number of indices from toothfish found on the Ross shelf proper, as distinct from those ... a consistent peak over all sampling seasons in comparison with the southern group in which the ... distribution was multimodal, showed a consistent and significant higher ratio of males to females, was in ... poorer condition, and was more advanced in reproductive development. Author(s): J.M. Fenaughty (New ...
Meeting Document : WG-FSA-05/52 : Author(s): J.M. Fenaughty (New Zealand)
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Acoustic assessment of potential bias in abundance estimates of mackerel icefish from trawl surveys
Abstract: In 2000, CCAMLR asked the Working Group on Fish Stock Assessment (WG-FSA), whether ... that a significant proportion of the stock occurred in midwater. If this is the case, then bottom trawl ... trawl and acoustic data taken contemporaneously during a survey for mackerel icefish in the Heard Island ... region (CCAMLR division 58.5.2) in May 2000. The relationship between mackerel icefish catches and the ...
Meeting Document : WAMI-01/05 : Author(s): E. van Wijk, T. Pauly, A. Constable and R. Williams (Australia)
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PROPERTIES OF WATER DYNAMICS AND KRILL DISTRIBUTION IN THE SOUTH SANDWICH ISLANDS SUBAREA
Abstract: of mean krill density in Subarea 48.4 there are premises for formation of the zones ... with meanders and eddy favorable for krill concentration. Here, in the cold water of the Weddell Sea ... , the main part of biomass of Subarea 48.4, are concentrated. In January-February, 2000, almost 60% of ... fields, distributed in a rather narrow depth range,- obviously may promote above said zones, firstly ...
Meeting Document : WG-EMM-09/44 Rev. 1 : Author(s): S.M. Kasatkina and V.N. Shnar (Russia)