Résultats de la recherche
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Simulating nursery areas for Antarctic krill along the western Antarctic Peninsula with relevance for the Domain 1 MPA Planning process
Abstract: Antarctic krill (Euphausia superba) is a key species and a dominant grazer in the ... that conditions a successful completion of the cycle. The objective of the present study is to estimate ... along the western Antarctic Peninsula (WAP) shelf. This objective was addressed using a one-dimensional ... with temperature and density fields from a high-resolution model scaled by projections for 2030 for the ...
Meeting Document : SC-CAMLR-XXXVI/BG/12 : Auteur(s): Delegations of Argentina and Chile
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Trophic study of Ross Sea Antarctic toothfish (Dissostichus mawsoni) using carbon and nitrogen stable isotopes
indicate that, very generally, larger fish consume prey of a higher trophic level than smaller fish. There ... were substantial residual within-species variations in δ15N and δ13C. Dissostichus mawsoni exhibited a ... rostrata (2.7 ‰ range) showed a d15N range greater than 3.4 ‰ spanning more than one trophic step. This ... implies that the diet of all species sampled was variable, or that individual species were eating a ...
Meeting Document : WG-EMM-08/27 : Auteur(s): S.J. Bury, M.H. Pinkerton, D.R. Thompson, S. Hanchet, J. Brown and I. Vorster (New Zealand)
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Surface water masses, primary production, krill distribution and predator foraging in the vicinity of Elephant Island during the 1989-90 austral summer
Abstract: Four successive surveys of the pelagic marine environment were conducted over a 100-by ... predators. A hydrographic front, north of Elephant Island and aligned southwest-to-northeast, persisted ... of it. A second front was apparent at the eastern side of the study area and was tentatively ... mature and exhibited a general transition from reproductively active to gravid and spent individuals. A ...
Meeting Document : WG-CEMP-90/11 : Auteur(s): A.F. Amos, J.L. Bengtson, O. Holm-Hansen, V.J. Loeb, M.C. Macaulay and J.H. Wormuth (USA)
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The use of predator-derived krill length-frequency distributions to calculate krill target strength
ecosystem based approach to resource management. We propose a method using krill sampled from the diet of ... predators to provide a length-frequency distribution of krill at times when it is possible to run automated ... operations. This will allow a robust estimate of krill abundance to be estimated from acoustic data. Changes ... in the length-frequency distribution of krill over a period of few weeks produced a 10 % difference ...
Meeting Document : WG-EMM-00/42 : Auteur(s): K. Reid and A.S. Brierley (United Kingdom)
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REPORT ON THE ABANDONED GILLNET RETRIEVAL OPERATION CONDUCTED BY AUSTRALIA IN CCAMLR STATISTICAL DIVISION 58.4.3B (BANZARE BANK)
gillnets as a fishing method to target toothfish in the Convention area. Estimating the impact of IUU ... fishing is hampered by a lack of data on the design, deployment, catch and bycatch rates of gill nets ... . This paper describes a gillnet found abandoned by Australian vessel patrolling BANZARE Bank ... (Statistical Division 58.4.3b), and the toothfish and bycatch found when a section of the gillnet was retrieved ...
Meeting Document : TASO-09/10 : Auteur(s): Snowdon, D., Hamill, J., McEachan, F., Welsford, D.
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Estimation of krill (Euphausia superba) mortality and production rate in the Antarctic peninsula region
Abstract: A net sampling survey for krill was carried out by RV ‘Meteor’ along the Antarctic ... exceeded a factor of 35 times, while interannual variability between available surveys reached only a ... factor of 1.6 times. Krill mortality was calculated by linearized catch curve analysis and resulted a ... rate of Z=0.88 (1989/90) and Z=0.96 (1987/88). Production was estimated and resulted a P/B ratio of ...
Meeting Document : WG-KRILL-91/15 : Auteur(s): Delegation of Germany
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Outline proposal for geographic information services for CCAMLR
Abstract: This document outlines a proposal from the British Antarctic Survey (BAS) to provide a ... Geographical Information System (GIS) for CCAMLR. The proposal offers a web-based GIS that will provide state ... handling geographic information, and a phased handover of system development and maintenance to the ... experience in developing award-winning web-based GIS and spatial data access systems. The proposal offers a ...
Meeting Document : WG-EMM-12/70 : Auteur(s): Submitted by the Secretariat on behalf of Adrian Fox, British Antarctic Survey (United Kingdom)
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Report of the First Workshop on the Identification of Priority Areas for MPA Designation within Domain No. 1 (CCAMLR). Valparaiso 2012
, between 28 May and 1 June. At the workshop assisted delegates from 6 countries plus a number of NGOs and ... for conducting the analysis; a concerted list of conservation objectives to be included in the ... analyses; a review of existing and missing data; a definition of the cost-layer to be included; a ... was realized that some conservation objectives had a direct relationship with the feedback management ...
Meeting Document : WG-EMM-12/69
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Toothfish tagging programme around South Georgia, 2000
Abstract: A tagging programme for toothfish (Dissostichus eleginoides)w as undertaken around ... South Georgia during early 2000. Details of the programme are given. A total of 359 toothfish were ... tagged during a trawl survey on the Shag Rocks shelf and a further 135 were tagged on the continental ... fishermen operating in the region. Author(s): G. Pilling, I. Everson, D. Agnew, T. Daw, R. Forster, A ...
Meeting Document : WG-FSA-00/26 : Auteur(s): G. Pilling, I. Everson, D. Agnew, T. Daw, R. Forster, A. North and M. Purves (United Kingdom)
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ANALYSIS OF THE POTENTIAL FOR AN ASSESSMENT OF TOOTHFISH STOCKS IN DIVISIONS 58.4.1, 58.4.2
Abstract: Exploratory fisheries for Dissostichus spp. have been operating in these regions for a ... number of consecutive years with the tagging of toothfish a prerequisite for the legal fishery. This ... paper presents a detailed study of the catch and effort trends in Divisions 58.4.1 and 58.4.2 and a ... examines 4 assessment methods based on comparative CPUE trends, local depletions, a constant recruitment ...
Meeting Document : WG-SAM-08/04 : Auteur(s): D.J. Agnew, C. Edwards, R. Hillary, R. Mitchell (UK) and L.J. López Abellán (Spain)