Résultats de la recherche

1. Ocean acidification and the Southern Ocean

   , including the Southern Ocean. The relative undersaturation of CaCO3 in the Southern Ocean suggests that ... organisms such as the pteropods that form the base of much of the Southern Ocean food chain. Orr et al (2005 ... ) predicted that under the Intergovernmental Panel on Climate Change (IPCC) IS92a warming scenario, which ... assumes “business as usual”- emissions leading to 778 ppm of CO2 in the atmosphere by 2100- aragonite will ...

   Meeting Document : CCAMLR-XXIX/BG/24 : Auteur(s): ASOC Observer

2. A feedback approach to Ecosystem Based Management: model predictive control of the Antarctic krill fishery

   Abstract:  The Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) aims ... to develop a feedback approach to aid Ecosystem Based Management (EBM) of the Antarctic krill fishery ... in the Southern Ocean. Feedback approaches in fisheries management usually include harvest control ... rules based on their predicted performance in a model of the controlled system. Here we use MPC to ...

   Meeting Document : WG-EMM-12/19 : Auteur(s): S. Hill and M. Cannon (United Kingdom)

3. Trophic interactions and population trends of killer whales (Orcinus orca) in the southern Ross Sea

   orca) are reported for the vicinity of Ross Island, Ross Sea, Antarctica, between 2002 and 2010 ... . Updating an earlier report, the frequency of sightings and the number of individuals per sighting of Ross ... coincident with a decrease in the number and size of an important prey: Antarctic toothfish (Dissostichus ... important to the whales, a relationship with potential parallels to that known between well-studied fish ...

   Meeting Document : WG-FSA-12/P03 : Auteur(s): D.G. Ainley and G. Ballard

4. Preliminary analysis of toothfish catch, CPUE, size structure and mark-recapture data from SSRUs 486A and 486G, with comments on the sustainability of different harvest levels

   in Subarea 48.6 north of 60°S (the combined SSRUs 48.6A and 48.6G). A preliminary assessment for D ... . mawsoni in Subarea 48.6 south of 60°S (the combined SSRUs 48.6B through 48.6E) is given in an Appendix. An ... proportional to the mean length at that age.  The model makes provision for IUU catches, insofar as this is ... possible given the available information.  Actual assumptions are set out in this document.  CPUE data are ...

   Meeting Document : WG-FSA-12/31 : Auteur(s): E. Thomson and M. Bergh (South Africa)

5. Further development of a spatially explicit population dynamics operating model for Antarctic toothfish in the Ross Sea region

   model for Antarctic toothfish over the entire Ross Sea region, for a medium scale spatial resolution ... (189 spatial cells) covering the Ross Sea region. The model was developed as a generalised Bayesian ... population dynamics model implemented using the Spatial Population Model software (SPM), and a single sex age ... appeared to broadly reflect the hypothesised spatial distribution of Antarctic toothfish, suggesting that ...

   Meeting Document : WG-SAM-13/35 : Auteur(s): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)

6. Winter distribution and condition of Antarctic krill in relation to sea-ice and water column production in the South Shetland Islands during Austral Winter 2013

   stations around the South Shetland Islands during a 30 day cruise between 10 August and 9 September 2013 ... . Abundance and demographic patterns revealed that Antarctic krill were concentrated in the southern ... during the 2012 winter survey (Reiss and Jones 2013; WG-EMM 13/40) but similar in size to krill found in ... the German survey during summer in 2013 (Siegel 2013; WG-EMM 13/24). Large krill (>50mm), although ...

   Meeting Document : WG-EMM-14/13 : Auteur(s): C.S. Reiss, J. Walsh, K. Dietrich and J.A. Santora (USA)

7. Revised research plan for the exploratory longline fishery for Dissostichus spp. in 2014/15 in Division 58.4.3a

   Abstract:  In 2011/2012, the Saint André conducted its first exploratory fishery for Dissostichus ... spp. in division 58.4.3a. France notified its wish to continue this exploratory fishery over the ... account the remarks made during the WG-SAM 2014. The objective is to progress on modelling tools and to ... improve the estimation of current biomass. The stock size in division 58.4.3a was estimated during WG-FSA ...

   Meeting Document : WG-FSA-14/05 : Auteur(s): Delegation of France

8. Potential modelling structures for a two-area stock assessment model for Antarctic toothfish (Dissostichus mawsoni) in the Amundsen Sea Region

   Abstract:  Two-area population models for Antarctic toothfish in the Amundsen Sea Region were ... developed further as current single area models did not fully explain the patterns in the observed data on ... tag recaptures and age composition. Although the hypothesised stock structure spans SSRUs 88.2C–H ... in 2014/15 are expected to better inform the assessment of the entire stock including SSRUs 88.2C–G ...

   Meeting Document : WG-SAM-15/49 : Auteur(s): S. Mormede, S.J. Parker, A. Dunn and S.M. Hanchet (New Zealand)

9. Research plan for the 2016/17 toothfish fishery in Division 58.4.4b by Japan and France

   Abstract:  Japan and France made the next season’s (2016/17) research plan in research blocks ... 58.4.4b_1 and 58.4.4b_2 using the updated CCAMLR C2 and Observer data. The estimated median stock size in ... -package tagr. The estimated median stock size in block 58.4.4b_1 and 58.4.4b_2 was 1 057, and 1 153 tonnes ... , respectively, in CPUE analogy method (reference area: northern area of Subarea 48.4) using the relevant ...

   Meeting Document : WG-SAM-16/06 : Auteur(s): Delegations of Japan and France

10. Some aspects of spatial–temporal variability of hydrodynamic water circulation and krill distribution in the Scotia Sea

    Abstract:  The authors considered the inter-annual variability of krill transport factors in the ... Scotia Sea analysing data from available meso-scale surveys covered the Scotia Sea. The subject of ... analysis were the geostrophic water masses circulation and krill transport factors, including variability ... of water masses  (kg / m 3) and krill biomass (g / m3) transporting across the survey area.  Obtained ...

    Meeting Document : WG-EMM-16/39 : Auteur(s): S.M. Kasatkina and V.N. Shnar

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