Résultats de la recherche
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IN SITU MEASUREMENTS OF TILT ANGLE DISTRIBUTION AND TARGET STRENGTH IN ANTARCTIC KRILL (EUPHAUSIA SUPERBA)
Abstract: Knowledge of the scattering properties of Antarctic krill (Euphausia superba) is ... crucial for biomass estimates of the species, but in situ investigations regarding this are still very ... scarce. We conducted a field study in the Southern Ocean where one of the objectives was to acquire data ... on orientation angles and target strength of Antarctic krill. The main investigations were done off ...
Meeting Document : WG-EMM-08/29 : Auteur(s): G. Skaret, S.A. Iversen, T. Knutsen, R.J. Korneliussen, E. Ona, R. Pedersen, A. Totland, T. Torkelsen (Norway) and X. Zhao (China)
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Abundance of Patagonian toothfish (D. eleginoides) at Macquarie Island estimated from tagging studies during 1995/96 fishing season
presents an analysis of a tag-recapture experiment carried during the Macquarie Island fishery for this ... species during the 1995-96 season. Simple population and tag accumulation models are used to account for ... the tags being released at various times throughout the season, and the effects of the removals by ... obtained for the pre-fishing abundance of the population in the season of 996 000 fish. However, this is ...
Meeting Document : WG-FSA-96/39 : Auteur(s): de la Mare, W., Williams, R.
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Setting management goals using information from predators
be set for higher trophic levels – such as marine mammals, birds and fish. It briefly explores the ... general characteristics of objectives for higher trophic levels within the context of ecosystem-based ... management, noting that the emphasis for managing the effects of human activities on higher trophic levels is ... biased towards fisheries-based approaches rather than approaches that take into account the maintenance ...
Meeting Document : WG-EMM-07/P7 : Auteur(s): A. Constable (Australia)
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Estimates of bird by-catch by IUU vessels in Subarea 48.3, 1998–2001
Abstract: Estimates of bird catches by IUU fishing made using the new method presented by Agnew ... and Kirkwood last year (WG-FSA-02/4 & 5) are updated to take account of the comments of the ... working group. Last year we suggested that the Isabel data from 1997 were rather atypical of bird catch ... rates in the illegal fishery, and that these were more likely to be similar to the bird catch rates made ...
Meeting Document : WG-FSA-03/56 : Auteur(s): D.J. Agnew (United Kingdom)
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Estimating penguin populations using image analysis of colour aerial photography
Abstract: Penguin populations are potentially sensitive indicators of change in the Antarctic and ... sub-Antarctic and are used extensively to monitor changes in the marine ecosystem. Aerial photographic ... surveys may provide the most robust method for estimating breeding population size, particularly for large ... carried out manually by counting individual birds on highly magnified prints. Here we present the results ...
Meeting Document : WG-EMM-02/34 Text : Auteur(s): P.N. Trathan (United Kingdom)
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Krill fishery information
Abstract: This paper reviews information from krill fisheries operating in the CCAMLR Convention ... Area during the period July 1999 to June 2001. During that period, 14 vessels targeted krill in Area 48 ... during the 1999/2000 season (July 1999 to June 2000). A total of 104259 t of krill was caught, of which ... in Area 48, and the total catch of krill reported during that period was 30175 t. The 2000/01 fishing ...
Meeting Document : WG-EMM-01/7 : Auteur(s): Secretariat
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Reducing seabird by-catch with an underwater longline setting funnel
Abstract: We tested the efficacy of a Mustad underwater setting funnel to reduce seabird bycatch ... in a demersal longline fishery for Patagonian toothfish Dissostichus eleginoides. The funnel, which ... deploys the longline 1-2 m beneath the sea surface, was used on 52% of 1714 sets (total effort 5.12 ... bait loss on sets through the funnel. Overall bird bycatch rate was low (0.022 birds per 1000 hooks ...
Meeting Document : WG-FSA-00/29 : Auteur(s): P. Ryan and B. Watkins (South Africa)
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CCAMLR’s next steps to stop IUU fishing
Abstract: Illegal, unreported and unregulated (IUU) fishing continues to be a problem in the ... Convention Area, undermining the intrinsic values of CCAMLR and of the Antarctic Treaty. In spite of the ... CCAMLR Members can take individually and collectively to eliminate IUU fishing in the CCAMLR Area. At ... for the effective implementation of those enhanced port State measures by developing countries. At the ...
Meeting Document : CCAMLR-XXX/BG/22 : Auteur(s): Submitted by ASOC
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ANALYSIS OF ROSS SEA TAGGING AND RECAPTURE RATES
year and recapture year for tags released and recaptured in the same SSRUs on the slope of 88.1 was ... compiled for the years 2003-2006. Recapture rate was expressed as tags captured/tags released/fish scanned ... (caught), all in numbers. 2. The overall size of the dataset was 734 combinations of release year ... has not been consistent enough between nations to allow the analysis to be definitive. In many cases ...
Meeting Document : WG-SAM-08/07 : Auteur(s): D.J. Agnew (UK)
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Analyse des menaces potentielles de la pêche pour les objectifs de l'AMP proposée pour la région de la mer de Ross
Abstract: We present an analysis of potential threats from fishing to the achievement of MPA ... objectives identified in the Ross Sea region MPA proposal submitted jointly by New Zealand and the USA ... . Ecosystem threats from fishing potentially undermine the requirements of Article II(3) paragraphs b and c ... and scientific objectives were always implicit in the systematic process of MPA design used by New ...
Meeting Document : SC-CAMLR-IM-I/09 : Auteur(s): Delegations of New Zealand and the USA