Search results
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Revised assessment models for Patagonian toothfish in research block 58.4.4b_1 (SSRU 58.4.4bC) for the years 1990–2014
included all observations. The Working Group, however, requested the further examination of the sensitivity ... also requested that projections be presented to WG-FSA for this assessment that examine ... . The Working Group, however, requested the further examination of the sensitivity to the 2008 tag data, along ... with the IUU selectivity modeled as a double normal function. The Working Group also requested that projections ...
Meeting Document : WG-FSA-15/23 : Author(s): K. Taki (Japan), S. Mormede (New Zealand) and T. Ichii (Japan)
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Marine Ecosystem Assessment for the Southern Ocean (MEASO)
, an indication of where and when national research programmes have conducted field work were requested ... , an indication of where and when national research programmes have conducted field work were requested ...
Meeting Document : SC-CAMLR-XXXVII/BG/22 : Author(s): A. Constable, J. Melbourne-Thomas, R. Trebilco and M. Brasier
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An exact time of release and recapture stock assessment model applied to Macquarie Island Patagonian toothfish (Dissostichus eleginoides)
Abstract: This paper presents an assessment of the harvested population of Patagonian toothfish ... at Macquarie Island based on data from a tag-recapture experiment initiated during the 1995/96 ... fishing season. Population models that include dynamics of tagged and un-tagged fish, daily releases ... , catches, recaptures, natural mortality, and annual net recruitment are used to assess the population of ...
Meeting Document : WG-FSA-00/43 : Author(s): G. Tuck, W. de la Mare, W. Hearn, R. Williams, A. Smith, X. He and A. Constable (Australia)
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OCEANIC CIRCUMPOLAR HABITATS OF ANTARCTIC KRILL
Abstract: Surveys of Euphausia superba often target localised shelves and ice edges where their ... , with 70% of the total stock concentrated between 0o and 90oW. Within this Atlantic sector, krill are ... abundant over both shelf and ocean. At the Antarctic Peninsula, by contrast, they are found mainly over the ... inner shelf whereas in the Indian-Pacific sectors krill prevail in the ocean within 200-300 km of the ...
Meeting Document : WG-EMM-08/P04 - Abstract : Author(s): A. Atkinson, V. Siegel, E. A. Pakhomov, P. Rothery, V. Loeb, R.M. Ross, L.B. Quetin, K. Schmidt, P. Fretwell, E.J. Murphy, G.A. Tarling and A.H. Fleming
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Further development of a spatially explicit population dynamics operating model for Antarctic toothfish in the Ross Sea region
. Observations include spatially explicit commercial catch proportions-at-age, proportions mature and proportions ... spawning (based on GSI data), CPUE, and tag-release and tag-recapture observations. Estimates of parameters ... appeared to broadly reflect the hypothesised spatial distribution of Antarctic toothfish, suggesting that ... younger fish were found predominantly in southern areas of the Ross Sea shelf, mature fish on the slope ...
Meeting Document : WG-SAM-13/35 : Author(s): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)
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Penguins, fur seals, and fishing: prey requirements and potential competition in the South Shetland Islands, Antarctica
may have a significant effect on krill abundance, we estimated the energy and prey requirements of ... used to estimate prey requirements of these breeding adult, land-based predators and their dependent ... 107 kg), gentoo penguins (1.2 x 107 kg), and Antarctic fur seals (3.6 x 106 kg). Total consumption of ... all land-based predators on the South Shetland Islands was estimated at 8.3 x 108 kg krill. The ...
Meeting Document : WG-EMM-99/57 : Author(s): D.A. Croll and B.R. Tershy (USA)
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Research plan for the exploratory longline fishery for Dissostichus spp. in 2015/16 in Division 58.4.4
Abstract: Regarding the low levels of stocks of Dissostichus spp. and the high levels of IUU ... estimated around 700 tonnes. CASAL model is updated with 2014 data but in the absence of an assessment using ... the CCAMLR decision rules, the catch limit should remain unchanged at 32 tonnes for 2015/16 to ... maximize the expectation of tag-recapture. Author(s): A. Rélot-Stirnemann (France) Title: Research plan ...
Meeting Document : WG-FSA-15/67 : Author(s): A. Rélot-Stirnemann (France)
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An updated descriptive analysis of the Antarctic toothfish (Dissostichus mawsoni) tagging scheme in the Ross Sea for the years 1997/98 to 2004/05
Abstract: An updated descriptive analysis of the toothfish tagging programme carried out in ... . A total of 4903 Antarctic toothfish have been released and 89 recaptured, and 443 Patagonian ... toothfish released and 9 recaptured. For the last two years, when tagging has been part of the Conservation ... Measure, New Zealand vessels have tagged between 1.0 and 2.77 toothfish per tonne of catch. Tagging rates ...
Meeting Document : WG-FSA-05/34 : Author(s): A. Dunn, S.M. Hanchet and K. Maxwell (New Zealand)
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A descriptive analysis of the toothfish (Dissostichus spp.) tagging programme in the Ross Sea up to 2005/06
Abstract: A descriptive analysis of the toothfish tagging programme carried out in Subareas 88.1 ... for non- New Zealand vessels for the first time. However, tag data were only available for all of ... these vessels for 2005 and for about half of these vessels for 2004. A reported total of 8888 Antarctic ... 20% of the recaptures could not be matched to a release observation, mainly because of missing ...
Meeting Document : WG-FSA-SAM-06/09 : Author(s): A. Dunn and S.M. Hanchet (New Zealand)
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Long-term change in zooplankton communities of the Southern Ocean between 1997 and 2018: implications for fisheries and ecosystems
Abstract: We provide an analysis of zooplankton distributions in the circumpolar Southern Ocean ... productivity, sea-surface temperature (SST), mixed layer depth, sea ice and the spatial gradient of SST (as an ... indicator of ocean fronts). Boosted Regression Tree models were used to investigate relationships between ... the abundances of key groups of zooplankton, occurrence of characteristic zooplankton communities, and ...
Meeting Document : WG-EMM-2019/66 : Author(s): M.H. Pinkerton, M. Decima, J. Kitchener, K. Takahashi, K. Robinson, R. Stewart and G.W. Hosie