Résultats de la recherche

1. Using stationary acoustic platforms to assess precision and accuracy of acoustical krill surveys

   issues of krill migrating too close to the surface to be acoustically detected, as well as potential ... issues of diel changes in acoustic scattering strengths. However, due to logistic constraints, acoustic ... effects of krill vertical distribution on survey results. The Institute of Marine Research, Norway has on ... the South Orkney Islands since 2014, and in this report some of these data have been analysed in order ...

   Meeting Document : WG-EMM-2019/32 : Auteur(s): T. Klevjer, G. Skaret and B.A. Krafft

2. Deployment of research hauls in the exploratory fisheries for Dissostichus spp. in Subareas 48.6 and 58.4 in 2010/11

   advice of the Scientific Committee, and using information held by the CCAMLR Data Centre. Vessels were ... provided with three random lots of starting positions for research hauls in each SSRU. These random lots ... vessel’s arrival at the SSRU. As of the end of June 2011, five vessels (Hong Jin No. 701, Insung No.7 ... in 2010/11. The vessels completed a total of 124 research hauls and, in all instances where ...

   Meeting Document : WG-SAM-11/04 : Auteur(s): Secretariat

3. Modelling the predator–prey interactions of krill, baleen whales and seals in the Antarctic ecosystem

   Abstract:  The history of human harvests of seals, whales, fish and krill in the Antarctic is ... summarized briefly, and the central role played by krill emphasized. The background to the hypothesis of a ... that has become available since the postulate was first advanced is discussed. The objective of the ... ) species. The model commences in 1780 (the onset of fur seal harvests) and distinguishes the Atlantic ...

   Meeting Document : WG-EMM-05/34 : Auteur(s): M. Mori and D.S. Butterworth (South Africa)

4. Changes to seabird avoidance regulations in Alaska demersal longline fisheries based on scientific research on effectiveness of mitigation measures

   longline fisheries off Alaska. One of the main recommendations is for the required use of paired streamer ... Washington Sea Grant Program (WSGP) on the effectiveness of seabird avoidance measures in the longline ... fisheries off Alaska. For complete details of the research, results, and recommendations, see the WSGP final ... (WG-FSA 01/35). Rigorous experimental tests of seabird avoidance measures on the local abundance ...

   Meeting Document : WG-FSA-02/53 : Auteur(s): K.S. Rivera (USA)

5. 30 years of krill fisheries management – challenges remain

   frequently. The reproduction and survival of krill are significantly affected by sea ice cover. This is of ... concern since key spawning, recruitment and nursery areas of krill are located in the Southwest Atlantic ... sector, an area that has been warming rapidly, resulting in a reduction in the extent and duration of ... establishment of CM 51-07 – distributing the trigger limit among statistical subareas – was a step in the right ...

   Meeting Document : CCAMLR-XXX/BG/19 : Auteur(s): Submitted by ASOC

6. Results from the random stratified trawl surveys to estimate distribution and abundance of Dissostichus eleginoides and Champsocephalus gunnari in the Heard Island region (Division 58.5.2) for 2010 and 2011

   2011 on the RV Southern Champion, adding to the time series of annual surveys in Division 58.5.2 that ... information on abundance. Catches of D. eleginoides were at half or lower than in surveys from both years than ... the average catch for the previous four years (2006-2009).  Catches of C. gunnari were very low, with ... the 2011 catch, at less than 0.5 t, 15% of the earlier four year average, and the 2010 catch being 60 ...

   Meeting Document : WG-FSA-11/23 : Auteur(s): G.B. Nowara, S.G. Candy and T. Lamb (Australia)

7. DEVELOPMENT OF SPATIALLY EXPLICIT AGE-STRUCTURED POPULATION DYNAMICS OPERATING MODELS FOR ANTARCTIC TOOTHFISH IN THE ROSS SEA

   other factors to quantify risk and uncertainties for management of the Ross Sea Antarctic toothfish ... program allows implementation of an aggregate movement model for use with large numbers of areas as a ... mortality), as well as movement processes defined as the product of a set of preference functions that are ... based on known attributes of spatial location. The operating models considered were single sex age ...

   Meeting Document : WG-SAM-09/18 : Auteur(s): A. Dunn, S. Rasmussen and S. Hanchet (New Zealand)

8. Potential climate change effects on the habitat of Antarctic krill

   summer foraging sites of many of these predators are concentrated between 0° and 90°W. Parts of this ... sector have experienced recent localised sea surface warming of up to 0.2°C     per decade, and ... projections suggest that further widespread warming of 0.27° to 1.08°C will occur by the late 21st century. We ... assess the influence of projected warming on Antarctic krill habitat quality. The results divide the ...

   Meeting Document : WG-EMM-13/20 : Auteur(s): S.L. Hill, T. Phillips and A. Atkinson (United Kingdom)

9. An updated spatially explicit population dynamics operating model for Antarctic toothfish in the habitable depths of the Ross Sea region

   population was restricted to those cells in which at least 5% of cell area was of a depth deemed suitable as ... that a proportion of the mature fish spawn each year. The model estimation of the maturity ogive is now ... similar to that estimated by histological analysis. This model represents our current best model of the ... spatial distribution and movement of Antarctic toothfish in the Ross Sea region given the movement ...

   Meeting Document : WG-SAM-14/31 : Auteur(s): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)

10. Using predators and their prey to characterise the status of the marine ecosystem at South Georgia

    Abstract:  Increased awareness about the present status of marine systems, including those where ... fisheries target the prey of natural predators, has led to recommendations about how information on the ... status of marine predators might be used to inform ecosystem-based management approaches. In the ... Antarctic, sustained ecological research has generated long-term data on the performance of marine predators ...

    Meeting Document : WG-EMM-16/28 : Auteur(s): P. Trathan, S. Fielding, S. Hill, M. Belchier and J. Forcada

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