Résultats de la recherche
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Further calculations of the effects of krill fishing on predators
situation where predator survival rates depend on other factors in addition to krill biomass. This is ... random component in the relationship between krill biomass and availability. An examination of the ... consequences in the case of the blackbrowed albatross suggest that these other factors result in yet lesser ... estimate the levels of krill harvesting which would result in halving the sizes of various krill predator ...
Meeting Document : WG-Krill-94/24 : Auteur(s): D.S. Butterworth and R.B. Thomson (South Africa)
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A critical issue for feedback management – how do we determine the level of functional overlap between krill fishing operations and penguin foraging activity?
Abstract: The spatial distribution of the Antarctic krill fishery in Subareas 48.1 to 48.3 has ... changed over time. The majority of catches in Subarea 48.1 are now taken south of the South Shetland ... Islands, following regional decreases in seasonal sea-ice cover. As the cumulative spatial footprint of ... target the same type types of krill swarms in the same places). In contrast to Subarea 48.1, the fishery ...
Meeting Document : WG-EMM-15/11 : Auteur(s): P.N. Trathan, J.R.D. Silk, S.L. Hill (United Kingdom) and H.J. Lynch (USA)
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Soft-sediment macrozoobenthos from Domain 1 (Antarctica): A preliminary report using community parameters and proxies
Abstract: The present scientific report presents the analysis of a database compilation in order ... biogenic opal and TOC in sites with highest density of benthic organisms. Although, sampling effort can ... play an important role in the results, data suggests that the seafloor around King George Island can be ... considered as a hot-spot of diversity as well as production, and the geochemical proxies are in agree with ...
Meeting Document : SC-CAMLR-XXXVI/BG/10 : Auteur(s): Delegation of Chile
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Diet of Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea region, Antarctica
Abstract: The diet of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region was ... examined based on stomach samples obtained from observers on New Zealand fishing vessels in 2003 and 2010 ... study did not distinguish between M. whitsoni and M. caml, but this should occur in future. Over the ... stomach contents of toothfish could be used to detect ecosystem change in the Ross Sea region, with a ...
Meeting Document : WG-FSA-12/52 : Auteur(s): D.W. Stevens, M.R. Dunn, M.H. Pinkerton and J.S. Forman (New Zealand)
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Chlorophyll distributions around the South Shetland Islands
patterns around the South Shetland Islands in the Antarctic survey of R/V the Kaiyo Maru from 13 December ... 1990 to 11 January 1991 (Leg I) and from 16 January to 11 February 1991 (Leg II). In the north of ... Livingston Island, high chlorophyll a concentration and low POC/chlorophyll a ratio in Leg II and low ... chlorophyll a concentration in Leg I suggest that phytoplankton bloom occurred in this area for about one ...
Meeting Document : WG-KRILL-93/23 : Auteur(s): H. Ishii, T. Ichii and M. Naganobu (Japan)
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Age/length key for Champsocephalus gunnari from South Georgia; Hill Cove survey, January 1990
Abstract: Discrepancy was noted between the age length key and modes in the length distribution ... of Ch. gunnari from the Hill Cove survey around South Georgia in January 1990. A revised age length ... key for this survey is proposed, based on data from a previous survey in the area. The revised age ... length key corresponds well to modes in the length distribution from the survey and to another key ...
Meeting Document : WG-FSA-91/18 : Auteur(s): G. Parkes (United Kingdom)
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Analysis and modelling of the Soviet Southern Ocean krill fleet, II: Estimating the number of concentrations and analytical justification for search data
Abstract: In this paper, I show how data that are routinely collected by survey vessels can be ... used to estimate the number of Concentrations of krill (in the sense of Butterworth (1988), Mangel ... (1988)) in a given region of the southern ocean. Sample computations are performed, using data collected ... by Soviet research/survey vessels in the early 1980s. These examples highlight the need for a ...
Meeting Document : WS-KCPUE-89/06 : Auteur(s): M. Mangel (South Africa)
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Potential for using CCAMLR VMS data for compliance analysis and data quality assurance
Abstract: In response to a request from the Scientific Committee the Secretariat has initiated a ... process to utilise VMS data for data-quality assurance in relation to catch data. This represents a change ... in focus on the use of VMS data by CCAMLR and requires a contingent change in emphasis on data ... quality assurance processes in order to ensure that the VMS can be used with an appropriate degree of ...
Meeting Document : SC-CAMLR-XXXIV/BG/19 : Auteur(s): CCAMLR Secretariat
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OPTIONS FOR USING UNREPLICATED ECOSYSTEM MONITORING DATA TO DETECT IMPACTS
. Furthermore, CEMP data cannot be used in a standard environmental impact assessment framework as they lack ... control sites. Identifying how these data could be used in an ecosystem management strategy is therefore ... and a schedule of tactical interventions in response to these impacts (e.g. restrictions on fishing ... either assess the expected probability of an observed value in an unimpacted system, or they assess the ...
Meeting Document : WG-EMM-09/26 : Auteur(s): S. Hill, J. Forcada, P. Trathan and C. Waluda (United Kingdom)
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Krill fishery report: 2007 update
for krill in Area 48 in the 2006/07 season, and these vessels have taken 61876 t of krill to date. Two ... the season is approximately 111746 t. This compares with 106589 t of krill reported in the STATLANT ... overlap between the krill fishery and krill predators; Consideration of the Conservation Measures in force ... in the fishery. Reference information on stock and areas, and parameters used in stock assessment are ...
Meeting Document : WG-EMM-07/05 : Auteur(s): Secretariat