Résultats de la recherche
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An overview of the elasmobranch fish of the Southern Ocean
Abstract: This review summarises current knowledge of the elasmobranch fish occurring in the ... Antarctic and sub-Antarctic waters of the CCAMLR area. About 14–15 species of elasmobranch have been ... recorded, with skates (Rajiformes) the most speciose order. Two genera of skates are known (Amblyraja and ... Bathyraja), although the current taxonomic knowledge of some species or species-groups is incomplete. Five ...
Meeting Document : WG-FSA-13/28 : Auteur(s): J.R. Ellis, S.R. McCully, V.V. Laptikhovsky and R. Scott (United Kingdom)
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Estimation and correction of migration-related bias in the tag-based stock assessment of Patagonian toothfish in Division 58.5.2
Abstract: Migration has the potential to violate the assumptions of tag recapture models used in ... the assessment of toothfish stocks. Evaluating the potential bias introduced into stock assessments ... and tag-based biomass estimates when the distributions of tagged fish, fishing effort and the ... underlying stock distribution are spatially heterogeneous is currently one of the highest priorities of the ...
Meeting Document : WG-SAM-17/11 : Auteur(s): P. Burch, P. Ziegler, D. Welsford and C. Péron
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Progress report on the joint research for Dissostichus spp. in Subarea 88.3 by the Republic of Korea and New Zealand and notification of research in 2018/19
–883_5. Due to extreme ice conditions covering the southern part of 88.3, the Janas (NZL) was not able to ... conduct its part of the survey. The total catch of D. mawsoni was 38,856 kg comprised of 1,380 individuals ... in blocks 883_3 and 883_4 showed similar values of 0.1369 and 0.1466 kg/hook, research block 883_5 ... per tonne and 72%. The length frequency of D. mawsoni exhibited a bimodal distribution with modes near ...
Meeting Document : WG-SAM-18/05 : Auteur(s): Delegations of the Republic of Korea and New Zealand
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On possible influence of continuous krill fishing technology with the use of ‘air-bubbling suspension system’ on ecosystem elements
, accompanied by introduction of highly intensive fishing and processing technologies call for studying the ... fishery influence on ecosystem components beyond the framework of traditional investigations of predator ... of studying the krill fishing technology. It is just trawl design and fishing method that will ... determine catchability, selectivity and ecological compatibility of the gear during the fishery and ...
Meeting Document : WG-EMM-06/27 : Auteur(s): S.M. Kasatkina and V.A. Sushin (Russia)
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Spatial and temporal variability in the fish diet of Antarctic fur seal Arctocephalus gazella in the atlantic sector of the southern ocean
Abstract: The spatial and temporal variability in the fish component of the diet of Antarctic fur ... seals Arctocephalus gazella (Peters 1975) in the Atlantic sector of the Southern Ocean was examined ... habitat/topography. The absence of formerly harvested fish species indicates a lack of recovery of stocks ... of Notothenia rossii (Richardson 1844) at South Georgia and Champsocephalus gunnari (Lönnberg 1905 ...
Meeting Document : WG-EMM-06/P5 : Auteur(s): K. Reid, D. Davis, I.J. Staniland (United Kingdom)
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Report of ACAP Working Group on Status and Trends Agreement on the Conservation of Albatrosses and Petrels – Status and Trends Working Group
Abstract: 1. The first Session of the Meeting of the Parties (MOP1) of the Agreement on the ... Conservation of Albatrosses and Petrels (ACAP) agreed to review the population status, trends and demography of ... albatrosses (21 species) and petrels (seven species) listed on Annex 1 of the Agreement (MOP1 Final Report ... aim of collecting and collating information on breeding numbers and critical population and ...
Meeting Document : WG-FSA-06/40
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A review of rattail (Macrourus spp.) and skate by-catch and analysis of standardised CPUE, for the exploratory fishery in the Ross Sea (CCAMLR Subareas 88.1 and 88.2) from 1997/98 to 2004/05
Abstract: A standardised CPUE analysis was used to determine factors affecting bycatch rates of ... were vessel, area, and depth. Catch rates of rattails were highest along the shelf edge (SSRUs 88.1E ... , 88.1I, 88.1K and 88.2E) in depths from 600 to 1000 m, and there was an order of magnitude difference in ... rattail catch rates between different vessels. Examination of vessel characteristics showed that catch ...
Meeting Document : WG-FSA-05/24 : Auteur(s): S.L. Ballara and R.L. O’Driscoll (New Zealand)
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Investigation of bias in the mark–recapture estimate of toothfish population size at South Georgia
Abstract: This paper investigates the influence of mixing of fish, and the uneven distribution of ... linear model of the South Georgia toothfish fishery, simulating fish movements within this system and ... overlaying various combinations of tagging and recapture effort to investigate bias. The fishable grounds ... uneven distribution of animals was simulated by adjusting an average movement rate downwards when animals ...
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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Assessing the feasibility of regional surveys of land-based predator abundance in the Southern Ocean: a framework for decision making and planning
Abstract: In 2000 WG-EMM discussed the need for region-wide and circum-Antarctic estimates of ... abundance of land-based predators. At the 2001 meeting of WG-EMM it was proposed that a workshop be held in ... 2002 to assess the feasibility of such broad-scale surveys, and a small intersessional correspondence ... group was formed to scope out the terms of reference and method of operation for the workshop. The ...
Meeting Document : WG-EMM-02/45 : Auteur(s): C. Southwell (Australia)
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Assessment of yield and status of Macrourus carinatus on BANZARE Bank in the southern Indian Ocean: implications for managing by-catch in CCAMLR fisheries
Abstract: This paper assesses the status and abundance of M. carinatus on BANZARE Bank ... Model (GYM) used previously by the CCAMLR Working Group on Fish Stock Assessment. Estimates of ... elsewhere in the world. The trawl survey data was used to calculate estimates of biomass and density for the ... area and showed that M. carinatus did not appear to be aggregated over any part of BANZARE Bank. The ...
Meeting Document : WG-FSA-99/69 : Auteur(s): E.M. van Wijk, A.J. Constable, R. Williams and T. Lamb (Australia)