Resultados de la búsqueda
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An index of per capita recruitment
introduce additional bias. On average, PCR will under estimate recruits per spawner by 30% if reasonable ... Abstract: An index of per capita recruitment (PCR) is proposed such that Ri PCRy–1 = R1y/(1–R1y ... postulated to affect it. The formulation of PCR is based on the assumptions that: 1) post-recruit mortality ... does not vary over age or between years; 2) 100% of age-1 animals spawn; 3) a representative sample of ...
Meeting Document : WG-EMM-99/50 : Autor(es): R. Hewitt (USA)
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Population structure and connectivity of an important pelagic forage fish in the antarctic ecosystem, Pleuragramma antarcticum, in relation to large scale circulation
Antarctica and are considered an important species rivaling krill as prey for many birds, seals, whales, and ... Ross Sea, ii) on the southern Antarctic Peninsula in Marguerite Bay and off Charcot Island, iii) off ... transported by the ACC, shelf processes on the West Antarctic Peninsula (WAP), or along the Weddell Front ... : Population structure and connectivity of an important pelagic forage fish in the antarctic ecosystem ...
Meeting Document : WG-FSA-12/23 : Autor(es): J.W. Ferguson (USA)
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At-sea distribution and diet of an endangered top predator: links of white-chinned petrels with commercial longline fisheries
white-chinned petrels (Procellaria aequinoctialis) breeding on Kerguelen Island, Southern Indian Ocean ... French Exclusive Economic Zone (EEZ) and other Commission for the Conservation of Antarctic Marine Living ... Resources areas during the study. We analysed concurrent data on the position of both birds and vessels to ... stage. Dynamic analysis (detection for each bird location of any operating vessel within a time/space ...
Meeting Document : WG-FSA-10/P01 : Autor(es): K. Delord, C. Cotté, C. Péron, C. Marteau, P. Pruvost, N. Gasco, G. Duhamel, Y. Cherel and H. Weimerskirch
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Research and monitoring to support an MPA in the Ross Sea Region
establishment of an MPA in the RSR will require agreement on alternative boundaries and objectives, and ... provide an improved plan that both usefully supports an MPA in the RSR and indicates a way forward for ... Abstract: Conservation Measure 91-04 establishes the requirement for research and monitoring ... should be structured. Here we present a draft plan to support an MPA in the Ross Sea Region (RSR) and ...
Meeting Document : WG-EMM-12/46 : Autor(es): G.M. Watters and C.S. Reiss (USA)
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Seasonal and inter-annual variability in the distribution of Electrona carlsbergi in the southern Polar Front area (the area to the north of South Georgia is used as an example)
the southern Polar Front area (the area to the north of South Georgia is used as an example) Abstract ... months were noted as transitional for parameters of vertical distribution and density of fish ... concentrations throughout the year. Results of surveys showed that the distribution and behaviour of E ... year is related to parameters of spatial and vertical distribution of fish. Interannual variability of ... in this area on board RV Vozrozhdenie. They worked for almost two years from October 1987 to June ... SOUTH GEORGIA IS USED AS AN EXAMPLE) A.N. Kozlov, K.V. Shust and A.V. Zemsky* Abstract From 1987 ... and autumn months were noted as transitional for parameters of vertical distribution and density of ... concentrations. Over many years, the basic biological features, distribution patterns, areas, timing and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 337–367 : Autor(es): Kozlov, A.N., K.V. Shust and A.V. Zemsky
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Towards an ecological risk assessment of krill fishing in East Antarctica (CCAMLR Divisions 58.4.1 and 58.4.2)
of krill catch and effort. We have pulled together an initial collection of existing krill predator ... available scientific data on abundance of krill predators, foraging activity and the historical distribution ... distribution models and have produced new preliminary models for krill and various predator species. We request ... to allow the completion of a first risk assessment for the krill fishery in this region in the near ...
Meeting Document : WG-EMM-17/20 : Autor(es): N. Kelly, M. Cox, L. Emmerson, S. Kawaguchi, B. Raymond, C. Southwell and D. Welsford
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Ross Sea Bioregionalisation, Part II: Patterns of co-occurrence of mesopredators in an intact polar ocean ecosystem
because of their rarity and, therefore, lack of adequate sighting data on which to generate spatial models ... ). Data on depth of diving and diet were taken from the literature. Three patterns of horizontal spatial ... mesopredators in an intact polar ocean ecosystem Approval: Approved ...
Meeting Document : WG-EMM-10/12 : Autor(es): G. Ballard, D. Jongsomjit and D.G. Ainley (USA)
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Developments towards an investigation of potential bias from the analysis of tag–release and recapture data in Ross Sea Antarctic toothfish abundance estimates
the current tagrecapture programme for Antarctic toothfish in the Ross Sea. We present an initial ... Abstract: This report outlines developments towards evaluating bias in abundance estimates for ... approach that uses the current data on catch (C2 data), tag-recovery effort and tag-release data from Dunn ... spatial pattern of tag releases and recovery effort has changed over the years that the tagging programme ...
Meeting Document : WG-FSA-SAM-06/10 : Autor(es): A. Dunn (New Zealand)
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An analysis of within-season recaptures of tagged toothfish
Abstract: In response to a request from WG-SAM, the secretariat inspected the available data on ... recapture locations for these fish was similar to that of all recaptured fish. The relative frequency of ... isolated, seamount in Subarea 88.2. Author(s): Secretariat Title: An analysis of within-season recaptures ...
Meeting Document : WG-FSA-13/01 : Autor(es): Secretariat
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An evaluation of the performance of the CCAMLR mackerel icefish (Champsocephalus gunnari) harvest control rule as applied within CCAMLR Subarea 48.3
having an almost negligible impact on the stock. Author(s): C. Darby, T. Earl and H. Peat (United ... harvest control rule for the mackerel icefish (Champsocephalus gunnari) in Subarea 48.3 are described. The ... Kingdom) Title: An evaluation of the performance of the CCAMLR mackerel icefish (Champsocephalus gunnari ...
Meeting Document : WG-SAM-13/31 Rev. 1 : Autor(es): C. Darby, T. Earl and H. Peat (United Kingdom)