Résultats de la recherche
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Demography and population trends of the Atlantic yellow-nosed albatross
of breeding birds was strongly correlated between the two islands, and over the whole study period ... both study populations have trended downward at around 1.2% per year. The number of established ... breeders on Gough Island has declined more rapidly, and significantly, at an annual rate of 2.3 ... %. Monitoring established breeders maybe a sensitive means of detecting population trends. Average breeding ...
Meeting Document : WG-FSA-03/37 : Auteur(s): R. Cuthbert (United Kingdom), P.G. Ryan, J. Cooper (South Africa) and G. Hilton (United Kingdom)
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Foraging movements of the shy albatross Diomedea cauta breeding in Australia; implications for interactions with longline fisheries
Abstract: Satellite telemetry was used to identify the foraging zones of Shy Albatrosses Diomedea ... Branca to the south) to assess their level of interaction with longline fisheries. Adult birds from both ... Branca foraged between the colony and the southeastern edge of the continental shelf. The distances ... travelled by the birds and the duration of their foraging trips varied during the breeding cycle and tended ...
Meeting Document : WG-FSA-98/33 : Auteur(s): N. Brothers, R. Gales, A. Hedd and G. Robertson (Australia)
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RELEVANT ISSUES IN REGARDS TO THE MANAGEMENT OF ANTARCTIC KRILL FISHERIES IN AREA 48
magnitude of the scientific uncertainties and data gaps affecting the subdivision of precautionary catch ... the data obtaining process financially. The discussion of that issue at 2009 WG-EMM meeting will be ... useful in a course of the consideration a decision on a Stage 1 allocation. In addition, this meeting ... monitoring plan for krill in Area 48. Due to the high level of risk associated with maintaining the current ...
Meeting Document : WG-EMM-09/31 : Auteur(s): L. Pshenichnov and G. Milinevsky (Ukraine)
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Dynamics of Antarctic penguin populations in relation to inter-annual variability in sea-ice distribution
Abstract: To investigate the role of sea ice cover on penguin populations we used principal ... component analysis to compare population variables of Adélie (Pygoscelis adeliae) and chinstrap (Pygoscelis ... population size remained stable, whereas that of chinstrap penguins decreased slightly. For neither species ... apparent inverse density-dependent relationship between the number of Adélie breeding pairs and the number ...
Meeting Document : WG-EMM-96/10 : Auteur(s): Murphy, E.J., Croxall, J.P., Trathan, P.N.
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Estimates of primary production by ice algae and phytoplankton in the coastal ice-covered area near Syowa Station, Antarctica
Abstract: Annual primary production of ice algae and phytoplankton under fast ice near Syowa ... February 1983 to January 1984 was calculated with a mathematical model based on measured parameters of ... solar radiation, day length, attenuation coefficients of snow, ice and water, chlorophyll a standing ... -2 h-1 in June to 13.3 E m-2 h-1 in December. Relative light intensity estimated at the bottom of sea ...
Meeting Document : WG-KRILL-93/28 : Auteur(s): H. Satoh, K. Watanabe and T. Hoshiai (Japan)
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Orientation of Antarctic krill in an aquarium
slightly less than that when animals were hovering, 49.7° (SD=7.5°, N=50). Such an acute angle of elevation ... . Although mature females with marked swelling of the cephalothorax were not included in the experiment, the ... center of mass was found to be situated more to the anterior than in males and immature females. The ... hovering orientation, which is close to average body orientation, of mature males and mature females was ...
Meeting Document : WG-KRILL-93/24 : Auteur(s): Y. Endo (Japan)
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Blue-eyed shags as indicators of changes in ittora fish populations
Abstract: The use of Shag’s pellets as an appropriate technique to monitor the abundance of ... littoral fish populations is presented for consideration of the CCAMLR Ecosystem Monitoring Program Working ... Group. The effectiveness of the method is based on the very good agreement found between the fish ... species identified by the examinations of otoliths present in regurgitated cast and those regularly ...
Meeting Document : WG-CEMP-93/25 Rev. 1 : Auteur(s): R. Casaux and E. Barrera-Oro (Argentina)
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Target strength of Antarctic krill
Abstract: In-situ measurements of individual krill target strength are presented (modal value ... reproductively mature and averaged 47.44mm in length. Results agree well with recent predictions of acoustic ... target strength based on extrapolations of other field experiments using the bent cylinder model of sound ... scattering by elongated zooplankters. The modal value of the measurements is 6.7dB lower than that predicted ...
Meeting Document : WG-KRILL-91/13 : Auteur(s): R.P. Hewitt and D.A. Demer (USA)
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Modelling and Decision Making as Part of the CCAMLR Management Regime
environment essential for the effective management of the Antarctic marine ecosystem within the requirements ... of CCAMLR Article II. Eight attributes (purpose, description, variables, driving forces, time ... development of suitable simulations of important Antarctic marine ecosystem interactions and to facilitate the ... formulation of a suitable decision-making protocol for management purposes. Author(s): D.G.M. Miller (South ...
Meeting Document : WG-CSD-88/10 : Auteur(s): D.G.M. Miller (South Africa)
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plotImage – software for producing augmented image plots of spatially referenced data
Abstract: Software is presented for the automated production of standardised image plots of ... spatially referenced data. While developed to satisfy the specific requirements of WG-FSA, the routines have ... been developed to be as generic as possible and may be useful for displaying a wide range of data. This ... Working Groups for the display of spatially referenced data. Author(s): J.P. McKinlay (Australia) Title ...
Meeting Document : WG-SAM-10/22 : Auteur(s): J.P. McKinlay (Australia)