Resultados de la búsqueda
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Spatial scales of benthic invertebrate habitats from fishery by catch and video transect data in the Ross Sea region
occurred at a typical scale of 10-30 km 2, though some sponge habitats appeared larger. Spatial analysis of ... Abstract: High resolution VME taxa bycatch data (at the longline segment level) has been ... presence of sponge and/or gorgonian bycatch are identifiable, as are several areas of dense fishing effort ... with no evidence of sponge or gorgonian presence. Identifiable sponge and/or gorgonian habitats ...
Meeting Document : WG-EMM-10/28 : Autor(es): S.J. Parker, R.G. Cole and S.M. Hanchet (New Zealand)
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Patterns of change in Antarctica
Abstract: Hard copies of the infographic will be circulated at CCAMLR-XXXIV. Author(s ... ): Delegation of the United Kingdom (Hard copies of the infographic will be circulated at CCAMLR-XXXIV) Title ... : Patterns of change in Antarctica Microsoft Word File: cc-xxxiv-bg-01.docx Approval: Approved Secretariat ...
Meeting Document : CCAMLR-XXXIV/BG/01 : Autor(es): Delegation of the United Kingdom (Hard copies of the infographic will be circulated at CCAMLR-XXXIV)
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Observations of Adélie penguins in two seasons with contrasting weather and sea-ice conditions – a brief report
-01 (19 days compared with 13). We suggest a combination of environmental factors operating at ... Abstract: The 2002-03 breeding season in comparison with 2000-01 at Edmondson Point was ... characterised by unusual sea ice and weather condition. Strong southerly winds and snow were experienced at the ... in by the presence of the large icebergs. This resulted in extensive sea ice lasting into February ...
Meeting Document : WG-EMM-03/59 : Autor(es): S. Olmastroni, F. Pezzo, V. Volpi and S. Focardi (Italy)
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Preliminary assessment of the South Georgia ray populations
off lines at the water surface should have increased survivorship of discarded rays, although this ... accuracy and duration of CPUE data and the results of an ongoing mark-recapture experiment for rays at ... Abstract: We modelled the ray population at South Georgia using a surplus production model ... from a variety of sources, and included the consideration that since 2004 the practice of cutting rays ...
Meeting Document : WG-SAM-07/11 : Autor(es): D.J. Agnew, R. Mitchell, T. Carruthers, J. Roberts, R. Hillary and J. Pearce (United Kingdom)
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THE DIET OF THE ANTARCTIC TOOTHFISH IN THE ROSS SEA
is low. Here the diet of D. mawsoni consists of relatively small squid of at least six different ... Abstract: This brief review documents the species composition of prey consumed by the Antarctic ... by both frequency of occurrence and dry weight. P. antarcticum is 71% by occurrence and 89% by weight ... frequently consumed prey groups at 78-86% and 5-14%, respectively. Pleuragramma are absent from the warmer ...
Meeting Document : WG-EMM-09/16 : Autor(es): J.T. Eastman and A.L. DeVries (USA)
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UPDATE ON INTERSESSIONAL WORK BY THE SUBGROUP ON STATUS AND TRENDS ASSESSMENT OF PREDATOR POPULATIONS (WG-EMM-STAPP)
at estimating krill consumption by pack ice seals, fur seals, penguins and flying seabirds in small ... , reviewing diet and developing energetics models. The major task now requiring attention for estimation of ... krill consumption for SSMUs is the development of foraging distribution models for fur seals and ... penguins, and at-sea abundance distribution models for flying seabirds, to partition at-sea consumption by ...
Meeting Document : WG-EMM-11/30 : Autor(es): C. Southwell, L. Emmerson (Australia), J. Forcada (UK), M. Goebel, J. Hinke, H. Lynch (USA), P. Lyver (New Zealand), J. McKinlay (Australia), N. Ratcliffe (UK), D. Ramm, K. Reid (CCAMLR Secretariat), C. Reiss, W. Trivelpiece, S. Trivelpiece (USA) and P. Trathan (UK)
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Spatial distribution of foraging by female Antarctic fur seals
by female Antarctic fur seals breeding at the island of South Georgia was influenced by physical ... within 100 km of the location at which the offspring was being raised. When this constraint was removed ... at the end of lactation, females foraged to much greater ranges and there was evidence that they ... Abstract: The study tested the hypothesis that the distribution of critical habitat for foraging ...
Meeting Document : WG-EMM-01/26 : Autor(es): I.L. Boyd, I.J. Staniland and A.R. Martin (United Kingdom)
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ANALYSIS OF KRILL OBSERVER COVERAGE IN SUBAREA 48.3
efficient sampling proportion, at least for 48.3, should be >50% of vessels sampled each season, 20% of ... been implemented since 2002. Observers have been placed on approximately 50% of vessels fishing in any ... one season, and have been present on board for about 30% of the fishing season. They have achieved a ... rate of sampling equivalent to 18% of total hauls taken in a season being sampled for krill and 11% for ...
Meeting Document : WG-EMM-09/25 : Autor(es): D.J. Agnew, P. Grove, T. Peatman, R. Burns and C. Edwards (United Kingdom)
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Net sample validation of acoustic techniques used to identify and size Antarctic krill
echo-charts were also identified as krill on the basis of their difference in backscatter at 38 and 120 ... identified and distinguished from all other types of backscatter. Traditionally this has been achieved by ... sampling characteristic types of acoustic target with nets. More recently partitioning of backscatter into ... species groups has been attempted using differences in echo strength at two acoustic frequencies (ΔMVBS ...
Meeting Document : WG-EMM-97/46 : Autor(es): Watkins, J.L., Brierley, A.S.
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Warming effects in the Western Antarctic Peninsula Ecosystem: the role of population dynamic models for explaining and predicting penguin trends
suggest that the relevant processes underlying the population dynamics of these penguin species at King ... idea that global warming represent a major driver of avian predator populations and its major prey at ... developed simple conceptual models for decipher the role of climate and krill fluctuations on the population ... dynamics of these three pygoscelid penguin species inhabiting the Antarctic Peninsula region. Our results ...
Meeting Document : WG-EMM-12/18 : Autor(es): M. Lima and S.A. Estay (Chile)