Résultats de la recherche
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An initial examination of using CPUE as a fishery performance index for the krill fishery
Abstract: Early analyses of CPUE in the krill fishery concluded that it was not a useful index of ... krill abundance. However, understanding the factors effecting the operation of the krill fishery and the ... management of the krill fishery. This analysis reviewed catch and effort data from the krill fishery for the ... used to produce a fishery-scale performance index. The vessels-specific mean CPUE (log catch (kg) per ...
Meeting Document : WG-EMM-16/10 : Auteur(s): CCAMLR Secretariat
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region to 2016/17
Abstract: We provide an update of the Bayesian sex and age structured population stock assessment ... for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region (Subareas 88.1 and SSRUs 88.2A–B ... ), using catch, catch-at-age, and tag-recapture data from 1998 to 2017 and including the results from the ... Ross Sea Shelf survey from 2012 to 2017. The model estimates of unfished biomass and current status ...
Meeting Document : WG-FSA-17/37 Rev. 1 : Auteur(s): S. Mormede
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Advances are urgently needed in providing regular estimates of krill stock status based on the available data
Abstract: CCAMLR currently manages the krill fishery in subareas 48.1 to 48.4 using an arbitrary ... measure (the trigger level) which was established in 1991 and is “not related to the status of the krill ... stock”. At the same time, CCAMLR recognises that “advances are urgently needed” specifically because the ... trigger level is not related to the status of the stock. The establishing terms of reference for WG-EMM ...
Meeting Document : WG-EMM-2019/28 : Auteur(s): S. Hill, J. Hinke, N. Ratcliffe, P. Trathan and G. Watters
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region to 2018/19
(Dissostichus mawsoni) in the Ross Sea region (Subareas 88.1 and SSRUs 88.2A-B) is updated and revised using the ... most recent available data for the fishery. The assessment uses reported catch (C2), and tag-recapture ... data for 1998–2019 and age and abundance data from the Ross Sea Shelf survey for 2012–2019. Tag ... estimates using the updated data for 1998–2017, new data from 2018 and 2019, revised growth and length ...
Meeting Document : WG-FSA-2019/08 : Auteur(s): A. Dunn
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On biogeographic patterns of benthic invertebrate mega fauna on shelf areas of the Southern Ocean Atlantic sector
Abstract: The ideal approach to bioregionalisation of Antarctic and Southern Ocean shelf ... communities incorporates a range of data on physical, environmental and biological properties, as well as the ... the Atlantic sector of the Southern Ocean were analysed quantitatively from scientific survey trawl ... scale, with an ultimate aim of determining broad patterns of distribution. The region for which the ...
Meeting Document : WS-BSO-07/10 : Auteur(s): S.J. Lockhart and C.D. Jones (USA)
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Modelling the impact of krill fishing on seal and penguin colonies
Abstract: A key area of concern highlighted by the Scientific Committee of the Commission for the ... Conservation of Antarctic Marine Living Resources (CCAMLR) concerns the potential overlap of the krill fishery ... with the foraging area of land-based predators such as seals and penguins in the Antarctic Peninsula ... region. The dynamics of krill in this region are strongly influenced by advective processes. A key ...
Meeting Document : WG-EMM-05/14 : Auteur(s): É.E. Plagányi and D.S. Butterworth (South Africa)
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The toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2002/03: New Zealand vessel summary
toothfish and associated bycatch from the fishing operations has been collected. The purpose of this report ... is to present the analysis of data collected in the toothfish fishery for the 2003 season (this is ... part of the 2002–03 CCAMLR split fishing year), and to compare these results with previous years. Note ... this report is confined to data for the New Zealand vessels. The heavy ice conditions caused by the ...
Meeting Document : WG-FSA-03/44 : Auteur(s): M.L. Stevenson, S.M. Hanchet and P.L. Horn (New Zealand)
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Krill population dynamics in the Scotia Sea: variability in growth and mortality within a single population
Abstract: Understanding the demographics of Antarctic krill over large scales may be complicated ... by regional differences in the 11 processes that govern population structure. The influence of ... regional differences in growth and mortality on population size 12 structure was examined using data on the ... length–frequency distribution of krill in the Scotia Sea using samples from the South 13 Shetland Islands ...
Meeting Document : WG-EMM-02/16 : Auteur(s): K. Reid, E.J. Murphy (United Kingdom), V. Loeb and R.P. Hewitt (USA)
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Mackerel icefish biomass and distribution on the results of acoustic survey carried out in February–March 2002
Abstract: Results of the acoustic survey of icefish carried out by Russian vessel STM-8390 ... estimates of icefish were made by comparison an observed TS in situ histograms with the size composition of ... the ensonified fish, obtained by trawling. Results of acoustic estimates of icefish biomass and ... abundance values by size class in pelagic zone and in the near-bottom 8m layer (covered by bottom trawling ...
Meeting Document : WG-FSA-02/44 : Auteur(s): S.M. Kasatkina, V.Yu. Sunkovich, A.P. Malyshko and Zh.A. Frolkina
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A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997–98 to 2012–13
Abstract: This report summarises the timing, depth, and location of fishing together with the ... biological aspects and catch of Antarctic toothfish for the period 1997–98 to 2012–13. In 2012–13, all the ... Ross Sea slope SSRUs were clear of ice and catches were evenly distributed across the three SSRUs. As ... in recent years, the remaining catches came mainly from SSRUs 88.1C, 88.1J, and 88.2H. Unstandardised ...
Meeting Document : WG-FSA-13/48 : Auteur(s): S. Hanchet, S. Mormede and A. Dunn (New Zealand)