Résultats de la recherche

1. CALIBRATION ERROR IN THE AMLR PLANKTON TIME SERIES

   Isaac-Kidd Midwater Trawl (IKMT) from 1992 to 2007 showed a marked decline (~35%) in the volume of water ... filtered beginning in 2000. Analysis of tow time duration, reported ship speed during tows, and mean number ... of rotor counts from the flow meters showed no significant trends. The discrepancy in volume is ... traced to a simple arithmetic error in the calculation of the mouth area of the net. Since 2000, the net ...

   Meeting Document : WG-EMM-08/19 : Auteur(s): C. Reiss (USA)

2. Penguin foraging behavior in relation to the distribution of prey

   of their primary prey, krill (Euphausia superba) in the vicinity of Seal Island, South Shetland ... migration pattern, being dispersed in the upper portion of the water column at night and more concentrated ... midnight, with a reduction in effort around dawn and dusk (local apparent time). The mean and maximum depth ... dives did not exceed the maximum depth distribution of krill. These patterns in diving behavior may ...

   Meeting Document : WG-KRILL-93/47 : Auteur(s): D.A. Croll, R.P. Hewitt, D.A. Demer and J.K. Jansen (USA)

3. Precautionary spatial protection to facilitate the scientific study of habitats and communities under ice shelves in the context of recent, rapid, regional climate change

   Abstract:  Recent, rapid climate change is now well documented in the Antarctic, particularly in ... collapse; overall, 87% of the Peninsula’s glaciers have retreated in recent decades. Ice shelf collapse ... will lead to the loss of existing marine habitats and the creation of new habitats. In general, fauna ... under ice shelves exist in oligotrophic conditions, and because ice shelf collapse may lead to greater ...

   Meeting Document : WG-EMM-12/34 : Auteur(s): P.N Trathan, S.M. Grant (United Kingdom), V. Siegel and K.-H. Kock (Germany)

4. Preliminary report of outcomes of the 2nd international workshop on the ICED Southern Ocean Sentinel, held in Hobart Australia 7–11 May 2012

   Headquarters on 7-11 May 2012 in Hobart, Australia, hosted by the Australian Antarctic Division and the ... the discussion on strategies for measuring change in Southern Ocean marine ecosystems, including ship ... benchmarking Southern Ocean ecosystems in 2020 and for establishing routine activities for estimating change in ... involved in this work, particularly through the Working Group on Ecosystem Monitoring and Management and ...

   Meeting Document : WG-EMM-12/59 : Auteur(s): A. Constable (Australia)

5. Results of a CCAMLR-sponsored research survey to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea, February 2012

   longline surveys to monitor pre-recruit (<100 cm TL) toothfish in the south of SSRUs 881.J and 881.L in ... the southern Ross Sea using standardised gear in a standardised manner; and (ii) To carry out ... experimental depth-stratified fishing in 400–600 m depth adjacent to the survey boundaries to establish the ... carry out a longline survey of pre-recruit toothfish from a commercial fishing vessel in Ross Sea using ...

   Meeting Document : WG-FSA-12/41 : Auteur(s): S.M. Hanchet, S. Mormede, S. Parker, A. Dunn (New Zealand) and H.-S. Jo (Republic of Korea)

6. Revised research plan for the 2013/14 exploratory longline fishery of Dissostichus spp. in Division 58.4.3a

   in the last WG-SAM meeting. We tentatively recalculated a sample size of Dissostichus spp in each ... block in such a way that the numbers of tag recoveries in the 2016 season shows an approximately 0.3 of ... sizes turned out to be larger in many blocks and smaller in a few blocks over the data poor-fisheries ... block, in order to promote successful stock assessment. The separation rule was one of the major ...

   Meeting Document : WG-FSA-13/40 : Auteur(s): Delegation of Japan

7. Descriptive analysis of the toothfish (Dissostichus spp.) tagging programme in Subareas 88.1 & 88.2 for the years 2000–01 to 2012–13

   Abstract:  We provide an update of the descriptive analyses of the toothfish tagging programme in ... released and 95 recaptured since 2001. In recent years, most vessels have achieved or exceeded the required ... tagging rate of one toothfish per tonne of catch in the Ross Sea region. Tag recapture data showed that ... , North) in the Ross Sea region, 44 have moved from the Shelf to the Slope, 31 have moved from the Slope ...

   Meeting Document : WG-FSA-13/49 : Auteur(s): S. Parker, A. Dunn, S. Mormede and S. Hanchet (New Zealand)

8. Stable isotope analysis of tissue samples to investigate trophic linkages of Antarctic toothfish (Dissostichus mawsoni) in the Ross and Amundsen Sea regions

   Abstract:  Stable isotopes of carbon and nitrogen (δ 15 N and δ 13 C) in Antarctic toothfish ... (Dissostichus mawsoni) muscle were measured to study the trophic connections of Antarctic toothfish in the Ross ... lipid in muscle on δ 13 C in a way that did not compromise the accuracy of δ 15 N measurements. We found ... considerable variability in δ 15 N and δ 13 C of toothfish that were not explained by fish length, sex ...

   Meeting Document : WG-EMM-14/50 : Auteur(s): M.H. Pinkerton, S.J Bury, J.C.S. Brown, J. Forman and A. Kilimnik (New Zealand)

9. Assessment models for Patagonian toothfish in research block 58.4.4b_1 (SSRU 58.4.4bC) for the years 1990-2014

   assessments of Dissostichus eleginoides in the research block 58.4.4b_1 following the recommendation of the WG ... observations in 2008 from OB_1a model (OB_1b model), and 3) modified OB_1b model as fix of fishing selectivity ... estimates of OB_1b model (OB_1b_noage model). The fits to CPUE in 2008 and MPD profiles for tags in the same ... year in OB_1a model were spurious. This suggests that Shinsei-maru No. 3 was learning operation in its ...

   Meeting Document : WG-SAM-15/25 : Auteur(s): K. Taki (Japan), S. Mormede (New Zealand) and T. Ichii (Japan)

10. Biomass of Antarctic krill around South Shetland using 2-dB difference method in April 2016

    Abstract:  Antarctic Krill plays an important role in Antarctic ecosystems as the medium that ... connects phytoplankton to penguins, seals, and whales. It is also in the limelight as an important protein ... it is surrounded by Darke Passage in North, Weddle Sea in East, and Bransfield Strait in South ... regulation that limits Krill catch amount using fishing survey and acoustic assessment data in order to ...

    Meeting Document : WG-EMM-16/60 : Auteur(s): Delegation of the Republic of Korea

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