Résultats de la recherche
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Acoustic visualization of the three-dimensional prey field of foraging chinstrap penguins
pelagic ecosystems. Human intervention in such interactions can have effects that cascade throughout these ... these concerns because of problems associated with determining the availability of krill to their ... concordance was detected in shallower layers. We conclude that fine-scale, depth-dependent patterns of kill ... patchiness must be incorporated into analyses of krill availability to predator populations if we hope to ...
Meeting Document : WG-Joint-94/12 : Auteur(s): J.E. Zamon, C.H. Greene, E. Meir, D.A. Demer, R.P. Hewitt and S. Sexton (USA)
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Proposal for a SCOR Working Group to identify Ecosystem Essential Ocean Variables for measuring change in the biological properties of marine ecosystems
the Southern Ocean Observing System (SOOS) Science Steering Committee in conjuction with discussions ... Group is to develop a set of essential variables for monitoring that would contribute to assessments of ... detailed in this paper. It is recommended that the Scientific Committee of CCAMLR become involved in this ... involved in the CCAMLR Ecosystem Monitoring Program. The outcomes of this working group will be important ...
Meeting Document : WG-EMM-12/45 : Auteur(s): A. Constable (Australia)
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Historical data synthesis in the Southern Ocean: Priority data sets
anthropogenic-induced change. Such information can be used to underpin sustainable management strategies. We ... give an example of an historical data rescue project that is being conducted by ICED scientists at the ... Southern Ocean, the Discovery Investigations (1925-1951). ICED is keen to work with CCAMLR to determine how ... working alongside CCAMLR scientists to identify other relevant datasets that require rescue and ...
Meeting Document : WG-EMM-13/19 : Auteur(s): N.M. Johnston, E.J. Murphy, J.R.D. Silk, C.M. Waluda, S.L. Hill and R.D. Cavanagh (United Kingdom) on behalf of the ICED Scientific Steering Committee
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Density and biomass of Antarctic krill around South Shetland Islands using by 2-dB difference method
peripheries (33.8), with the length of the aggregations exceeding their height. It was evident that most krill ... backscattering strength (Sv) frequencies (38 and 120 kHz), a clear acoustic distinction could be made between ... of the South Shetland Islands (64.5) was higher than that in the south (35.9) and the Elephant Island ...
Meeting Document : SG-ASAM-17/04 : Auteur(s): S.-G. Choi, K. Lee and D. An
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Scientific background document in support of the development of a CCAMLR MPA in the Weddell Sea (Antarctica) – Version 2017 – Reflection of the recommendations by WG-EMM-16 and SC-CAMLR-XXXV
the level of protection for Antarctic toothfish and other demersal fish that explores a range of ... approach based on the updated data layer is shown. In Chapter 4 we outline the way we- at that stage ... . Teschke, H. Pehlke and T. Brey Title: Scientific background document in support of the development of a ...
Meeting Document : WG-FSA-17/29 : Auteur(s): K. Teschke, H. Pehlke and T. Brey
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Review of CCAMLR activities on monitoring marine debris in the Convention Area
debris for the first time from Marion Island (Subarea 58.7). There are 4 sites that have data for more ... the debris associated with seabird colonies. The number of Antarctic fur seal entanglements at Bird ... Island reached a peak in 1993 and has showed a general decline since, with the lowest levels on record ... be the main entangling materials. Seabirds were reported entangled at Bird Island for the first time ...
Meeting Document : SC-CAMLR-XXIV/BG/13 : Auteur(s): Secretariat
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An assessment of the use of ocean gliders to undertake acoustic measurements of zooplankton: the distribution and density of Antarctic krill in the Weddell Sea
monitoring. With appropriate survey design, gliders can be used for estimating krill distribution and ... analysis of glider pitch and roll indicated that, if not taken into account, glider orientation can impact ... survey boxes showed features coherent with ship-borne measurements, with peak densities in both boxes ...
Meeting Document : WG-EMM-14/P02 : Auteur(s): D. Guihen, S. Fielding, E. Murphy, K. Heywood and G. Griffiths
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Results of 2016 pop-off satellite archival tagging of Antarctic toothfish in the Ross Sea region
proposed to be implemented by a number of Members, we suggest that additional work, including product ... in the southern Ross Sea, data from two tags were reported via Argos (one with full data, one with ... development, is urgently needed to develop best practice guidance for tagging toothfish with PSAT tags. Author ...
Meeting Document : WG-SAM-17/33 : Auteur(s): C.D. Jones and S.J. Parker
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Effect of orientation on broadband acoustic scattering of Antarctic krill Euphausia superba: implications for inverting zooplankton spectral acoustic signatures for angle of orientation
orientation corresponding to each insonification, revealed that echo spectra from krill near broadside ... echo spectra had a more erratic structure, with several closely spaced nulls of variable depth. The ... pattern of changes in echo spectra with orientation for the experimentally measured acoustic returns was ... inversion technique can be implemented using a generic empirical model space to determine angle of ...
Meeting Document : WG-EMM-99/41 : Auteur(s): L.V. Martin Traykovski (USA), R.L. O’Driscoll (New Zealand) and D.E. McGehee (USA)
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Admiralty Bay (South Shetland Islands) - long-term marine monitoring program
vulnerable region of Western Antarctic. It is widely assumed that Antarctic biota are sensitive to ... predictions of future change. Comparison of the collected data with the archive data sets will allow us to ... biotic elements in Admiralty Bay. In this paper we provide WG-EMM with an update on proposed project ... ". This project will continue to develop over the coming years and results we will be presented and ...
Meeting Document : WG-EMM-15/47 : Auteur(s): A. Panasiuk-Chodnicka, M. Korczak-Abshire, M.I. Żmijewska, K. Chwedorzewska, E. Szymczak, D. Burska, D. Pryputniewicz-Flis and K. Łukawska-Matuszewska (Poland)