Résultats de la recherche
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OCEANIC CIRCUMPOLAR HABITATS OF ANTARCTIC KRILL
view that krill require high food concentrations, with a distribution often linked to shelves. For a ... regions of moderate food (0.5-1.0 mg chl a m-3). Advection models suggest some loss northwards from these ... evidence for a compensating southwards migration, with an increasing proportion of krill found south of the ... ACC as the season progressed. The retention of krill in moderately productive oceanic habitats is a ...
Meeting Document : WG-EMM-08/P04 - Abstract : Auteur(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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Krill of the Ross Sea: distribution, abundance and demography of Euphausia superba and Euphausia crystallorophias during the Italian Antarctic expedition (January–February 2000)
) were analysed to obtain a general picture of the summer distribution pattern, abundance and demography ... of krill in the western Ross Sea (Antarctica). A midwater sampler-trawl (Hamburg Plankton Net) was ... , in the area north of Continental Shelf, was 9.3 g/1000m3 of filtered water with a mean density of ... dominance in the High Antarctic Zone (south of 74°), with a mean relative biomass of 3.0 g/1000m3 and mean ...
Meeting Document : WG-EMM-02/32 Text : Auteur(s): A. Sala, M. Azzali and A. Russo (Italy)
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Has climate change promoted genetic fragmentation in the ice-dependent fish Pleuragramma antarcticum?
Abstract: Pleuragramma antarcticum is the only Antarctic notothenioid characterized by a complete ... pelagic life cycle and plays a major trophic role in the coastal Antarctic marine ecosystem. A previous ... investigate the population structure of P. antarcticum along the Antarctic Peninsula (AP) shelf, a region of ... Antarctica highly impacted by regional warming. We found a single gene pool and an absence of inter-annual ...
Meeting Document : WG-FSA-13/67 : Auteur(s): C. Agostini, T. Patarnello (Italy), J. Ashford, J. Torres (USA) and L. Zane (Italy)
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Results of the seventh Ross Sea shelf survey to monitor abundance of Antarctic toothfish in the southern Ross Sea, January 2018, and notification for research in 2018/19
Abstract: At its 2011 meeting, the Scientific Committee agreed that a time series of relative ... abundance from a well-designed survey would be a useful input into the Ross Sea stock assessment model. In ... southern Ross Sea (Strata A–C) using standardised gear in a standardised manner; and monitoring trends in ... relative biomass index of toothfish for the core strata showed a decrease from 2017 to a value equal to the ...
Meeting Document : WG-SAM-18/10 : Auteur(s): D. Stevens, X. Fu, S. Mormede and S. Parker
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Ross Sea fishery research and data collection plan
Abstract: A review of the use and effectiveness of research lines as a data collection and effort ... collected through fishing activities has effectively made the requirement to force a spread of research sets ... demonstrably higher on research hauls. The paper concludes with a proposal for a more effective Research Plan ... , environmental, and longline specific data on both the target species and on other catch species in a non biased ...
Meeting Document : WG-FSA-05/49 : Auteur(s): J. Fenaughty (New Zealand)
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Rossii revisited: new information on the early history of the fishery for Notothenia rossii in Subarea 48.3
assessments, based on the incomplete data set, had indicated a 1970 biomass of 600 000 tonnes and an ... unrealistic stock history considering that this stock was the first to be exploited in the Antarctic. A VPA ... using the new data suggests that unexploited biomass was over 900 000 tonnes, and declined in a manner ... to be expected from a new fishery. However, on the basis of historical reports and analyses of stock ...
Meeting Document : WG-FSA-95/17 : Auteur(s): Agnew, D.J.
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Some principles for fisheries regulation from an ecosystem perspective
Abstract: The paper discusses some principles to be considered in the formulation of a framework ... subsiduary objectives for regulation which have a more rigorous scientific interpretation than the broad ... degree to which objectives are being met to be assessed. The advantages of using a feedback method of ... that estimates are required for the abundance of a stock in advance of the substantial development of a ...
Meeting Document : SC-CAMLR-V/BG/13 : Auteur(s): Delegation of Australia
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Demonstrating proof of concept of the application of systematic conservation planning at the circumpolar scale
Abstract: Systematic conservation planning is a recognised tool for advancing ongoing efforts to ... planning already underway in a number of priority areas within the Southern Ocean, this report looks at the ... at a whole of Southern Ocean scale. Such an analysis would provide technical support to planning for ... be incorporated into a whole of Southern Ocean context, while also enabling planning work to occur ...
Meeting Document : WG-EMM-10/34 : Auteur(s): D. Beaver, R. Nicoll, G. Llewellyn, P. Harkness, C. Hellyer and J. Turner (ASOC-WWF)
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State of the Antarctic and the Southern Ocean Climate System (SASOCS)
Abstract: The paper is a summary of a detailed review produced for submission to a scientific ... , P.J. Barrett, N.A.N. Bertler, T. Bracegirdle, D. Bromwich, H. Campbell, G. Casassa, A. N. Garabato ... , W.B. Lyons, K.A. Maasch, P.A. Mayewski, M.P. Meredith, C. Summerhayes, J. Turner, D. Vaughan, A. Worby ... paper provides a review of the key developments over the past two years in our understanding of physics ...
Meeting Document : CCAMLR-XXVI/BG/37 : Auteur(s): Submitted by SCAR
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The effect of temporal variability on power analysis predictions for Adélie penguin CEMP parameters at Béchervaise Island
ability of CEMP data to detect change. The effect size that should prompt a response if observed in a ... power analysis estimates results in a decreased level of power to detect a trend. Similar power analysis ... results are obtained for a fixed co-efficient of variation of the temporal variability SD in relation to ... (5.2 – 6.7%). For example, with a 10 year monitoring program it is possible to detect fixed increases ...
Meeting Document : WG-EMM-03/49 : Auteur(s): L.M. Emmerson and C. Southwell (Australia)