Résultats de la recherche
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Descriptive analysis of the Antarctic toothfish (Dissostichus mawsoni) tagging scheme in the Ross Sea for the years 1997/98 to 2003/04
Abstract: A descriptive analysis of the toothfish tagging programme carried out in the Ross Sea ... been in the same proportion as the catch by area. However, recapture rates have tended to be higher in ... the northern and eastern SSRUs 88.1C and 88.2E. The maximum movement of Antarctic toothfish from the ... the mean size of fish taken in the commercial catch. Larger toothfish (>35 kg) are difficult to tag ...
Meeting Document : WG-FSA-SAM-05/10 : Auteur(s): A. Dunn, S.M. Hanchet and K. Maxwell (New Zealand)
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Identifying marine protected areas (MPAs) in data-poor regions to conserve biodiversity and to monitor ecosystem change: an Antarctic case study
biodiversity. A great challenge for meeting this goal, particularly in data-poor regions, is to avoid ... is needed for identifying areas in data-poor regions that would enable the objectives to be achieved ... in the long term. We elaborate a procedure that would satisfy the first stage of identifying a RSMPA ... ). We apply the procedure to eastern Antarctica, a region with spatially-restricted sampling of most ...
Meeting Document : WS-MPA-11/05 : Auteur(s): A.J. Constable, B. Raymond, S. Doust, D. Welsford (Australia), P. Koubbi (France) and A.L. Post (Australia)
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Distribution and some biological features of icefish (Champsocephalus gunnari) at different life cycle stages in the South Georgia subarea
north-east to coastal areas in the northern and north-eastern part and to the open shelf areas in the ... fish distribution at different stages of physiological state. Juvenile fish mainly distribute in the ... south, immature fish- in the cast and southwest, while adult at the north of the shelf. It was revealed ... migrations: young fish above 4 cm in length distribute within 75 cm from the bottom, and migrate into the ...
Meeting Document : WG-FSA-99/65 : Auteur(s): Zh.A. Frolkina (Russia)
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A hypothetical life cycle for Antarctic toothfish Dissostichus mawsoni in Antarctic waters of CCAMLR Statistical Area 88
Dissostichus mawsoni in CCAMLR Statistical Areas 88.1 & 88.2 were reviewed. Based on the presumed location ... of the smallest toothfish taken in the toothfish fishery. Our present hypothesis is that D. mawsoni ... in CCAMLR Statistical Subareas 88.1 and 88.2 spawn to the north of the Antarctic continental slope ... eastwards with the eastern Ross Sea gyre settling out along the continental slope and shelf to the east of ...
Meeting Document : WG-FSA-07/35 : Auteur(s): S.M. Hanchet, G.J. Rickard, J.M. Fenaughty, A. Dunn and M.J. Williams (New Zealand)
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Density and abundance estimates of baleen whales recorded during the 2019 DY098 cruise in the Scotia Sea around South Georgia and the South Sandwich Islands
Abstract: We use cetacean sightings data collected from the northern and eastern Scotia Arc ... of 42.5°W in all water depths surveyed, with fin whales the next most commonly sighted species (53 ... sightings and a cumulative count of 76 whales). Humpback whale abundance in South Georgia (Subarea 48.3) was ... abundance estimates of baleen whales recorded during the 2019 DY098 cruise in the Scotia Sea around South ...
Meeting Document : WG-EMM-2019/27 : Auteur(s): M. Baines, M. Reichelt, C. Lacey, S. Pinder, S. Fielding, N. Kelly, E. Murphy, P. Trathan and J.A. Jackson
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Fishing and conservation in southern waters
operations and the entanglement of seals in fragments of discarded or lost fishing gear. Most fish stocks had ... Abstract: Fishing in the Southern Ocean commenced on finfish in 1969/70 and on krill in 1972/73 ... the by-catch of juvenile fish in the krill fishery, to incidental mortality of birds during longline ... (CCAMLR) came into force in 1982. Stringent conservation measures to halt the further decline of the ...
Meeting Document : SC-CAMLR-XII/BG/11 : Auteur(s): Delegation of Germany
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Upward adjustments to local catch limits for the krill fishery in Subarea 48.1
adjustments to local catch limits for the krill fishery in Subarea 48.1. We use the term local catch limit to ... the gSSMUs defined in another compilation of vignettes (AERD 2016a, pp. 3-13). We propose upward ... krill fishery in Subarea 48.1 (see Watters et al. 2016). Our proposal to make upward adjustments is ... the stoplight is “green” and there has been a concomitant increase in local krill biomass. We ...
Meeting Document : WG-EMM-16/47 : Auteur(s): Antarctic Ecosystem Research Division, Southwest Fisheries Science Center and NOAA Fisheries
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Comparison between the CCAMLR-2000 and KY 1988 surveys on environmental variability of krill in the Scotia Sea, Antarctica
? in the western waters and 2.0? in the eastern waters of the Scotia Sea. Krill density became higher ... Japanese R/V Kaiyo Maru Survey in the 1987/88 austral summer season in the Scotia Sea. There were distinct ... krill distribution. The sea ice cover in 1987/88 extended northward widely during the last winter season ... such that sea ice remained around the South Orkney Islands until December 1987. In contrast, the sea ...
Meeting Document : WG-EMM-02/43 : Auteur(s): M. Naganobu (Japan), M. Brandon (United Kingdom), K. Ito, K. Segawa (Japan) and V. Siegel (Germany)
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Revised proposal for the ongoing research plan on Patagonian toothfish (Dissostichus eleginoides) in Division 58.4.4b (2016/17–2020/21)
the research objectives. The survey design has been amended to avoid sea pen hotspots in the eastern ... this research plan in 2015 and a joint proposal was submitted for the first time in 2016 (WG-SAM-16/06 ... and improved the revised research plan presented in SC-CAMLR-XXXVII Annex 12 and redefined slightly ... whales (O. orca) ecology and depredation ”) are addressed in two documents submitted at WG-SAM-19. We ...
Meeting Document : WG-SAM-2019/08 : Auteur(s): Delegations of Japan and France
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Ross Sea Bioregionalisation, Part II: Patterns of co-occurrence of mesopredators in an intact polar ocean ecosystem
Abstract: We report results of analyses of niche occupation among mesopredators in the Ross Sea ... used to identify areas of importance to species in a conservation prioritization framework (Zonation ... ice surrounding the Ross Sea post-polynya): combinations in which the slope is the main habitat but ... western and eastern portions of the shelf (where sea ice is persistent) are used as well (Minke whale ...
Meeting Document : WG-EMM-10/12 : Auteur(s): G. Ballard, D. Jongsomjit and D.G. Ainley (USA)