Résultats de la recherche
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Connectivity and population structure in Pleuragramma antarcticum along the west Antarctic Peninsula
connectivity, by testing between rival hypotheses of population segregation and linkage. If independent ... , reduction in sea-ice along the WAP may lead to extinction of local populations through drastic mortality of ... populations at 1) the north tip of the Peninsula, and 2) the southern WAP encompassing Charcot Island and ... Marguerite Bay, with no mixing between. The presence of a single length mode at Charcot Island and Marguerite ...
Meeting Document : WG-FSA-10/16 : Auteur(s): J. Ashford, J. Ferguson, A. Piñones, J. Torres and W. Fraser
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LENGTH-BASED ASSESSMENT FOR MACKEREL ICEFISH (CHAMPSOCEPHALUS GUNNARI) IN SUB-AREA 48.3
accurate identification of age cohorts from the survey data. In this paper we describe a length‐based ... approach that removes the problem of cohort determination. A stratified bootstrap technique (consistent ... with the current CCAMLR approach) is used to estimate the length distribution of the population from ... the survey data which, in conjunction with the bootstrapped survey biomass data, yields an estimate of ...
Meeting Document : WG-FSA-09/27 : Auteur(s): R.M. Hillary (Australia), C.T.T. Edwards, R.E. Mitchel and D.J. Agnew (United Kingdom)
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Update on work to estimate krill consumption by flying seabirds in CCAMLR Divisions 58.4.1 and 58.4.2
Abstract: We outline progress on current work aimed to improve estimates of flying seabird ... abundance, and ultimately krill consumption, from land-based breeding bird counts of five species (Antarctic ... these Divisions and conclude that only 2-3% of potential flying seabird breeding habitat has been ... searched for breeding populations. We conclude that a compilation of historical population counts where ...
Meeting Document : WG-EMM-17/11 : Auteur(s): C. Southwell and L. Emmerson
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Spatial variation in Antarctic toothfish (Dissostichus mawsoni) catch rate, mean weight, maturity stage and sex ratio across Divisions 58.4.1, 58.4.2 and 58.4.3b
development of stock structure hypotheses and spatially-explicit habitat-use models. Accordingly, this paper ... management advice in these Divisions is understanding the distribution, abundance and boundaries of the ... reports on the development of generalised additive mixed models to characterise relationships between ... environmental variables and (1) relative density, (2) mean weight, (3) proportion mature and (4) sex ratio of D ...
Meeting Document : WG-FSA-17/16 : Auteur(s): P. Yates, P. Ziegler, P. Burch, D. Maschette, D. Welsford and S. Wotherspoon
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Precautionary, ecosystem-based management for the Antarctic krill fishery: a work in progress
enhance its precautionary management of the krill fishery in line with Convention objectives. This paper ... compliance as they relate to the krill fishery. The paper concludes with a number of recommendations to make ... provides an update on the krill fishery; discusses the consideration of climate change in krill fisheries ... management; and addresses key aspects of krill research, ecosystem-based management, monitoring, bycatch, and ...
Meeting Document : SC-CAMLR-XXXVII/BG/17 : Auteur(s): Submitted by ASOC
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ZSPA et ZSGA
designated under the Antarctic Treaty as areas of special scientific or biological significance. The ... Secretariat of the Antarctic Treaty manages a database on the locations of ASPAs and ASMAs, and information on ... their management plans and purposes for designation. The location of ASPAs and ASMAs are shown as a ...
Page : Site Section: Data
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Krill Fishery Report 2015
Abstract: A consolidated summary of information related to the krill fishery, in a similar format ... the Scientific Committee. Alternative options for the presentation of time-series of the spatial ... distribution of catches are included. Author(s): CCAMLR Secretariat Title: Krill Fishery Report 2015 Approval ...
Meeting Document : SC-CAMLR-XXXIV/BG/21 : Auteur(s): CCAMLR Secretariat
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Assessment and tag program adaption methods for exploratory fisheries in the CAMLR Convention Area: an example application for Division 58.4.3a
initial stock assessment and adaption of catch limits and tagging rates is presented for new and ... tagging levels that will produce an expected abundance estimate in the following year of a given precision ... whilst ensuring the sustainable exploitation of the stock as per the CCAMLR management procedure. The ... combination of the assessment and tagging rate adaption methods can then form the basis of an early management ... eigenvalue of the Leslie matrix, although in the paper by Myers et al. (1997) assumptions about the stock ... exAmple AppliCAtion for division 58.4.3A R.M. Hillary Division of Biology Imperial College London SW7 ... assessment and adaption of catch limits and tagging rates is presented for new and exploratory stocks in the ... will produce an expected abundance estimate in the following year of a given precision whilst ensuring ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 101–113 : Auteur(s): Hillary, R.M
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Some changes observed in Antarctic seabird distribution and behaviour
- Kaliningrad from 1999 November to 2000 April are analyzed. Significant shift of the southern boundary range of ... fact may be explained by abundance fluctuation or shift of the Southern Polar Front to the South ... archipelago very low abundance area of blackbrowed albatross is revealed. The phenomenon may be explained by ... avoidance by BA in the area of the cold Weddell Sea waters penetrating North along the archipelago. Author(s ...
Meeting Document : WG-EMM-00/36 : Auteur(s): F. Litvinov (Russia)
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Designing Marine Protected Area networks: insights from the CHARM3 project
Abstract: This paper presents results from two analyses that have been undertaken as part of ... Action 12 of the CHARM3 project, which focuses on spatial conservation planning in the English Channel ... . The first analysis investigates the use of species area curves for setting marine habitat targets and ... shows this approach is sensitive to sample size and the type of species richness estimator. Thus, there ...
Meeting Document : WS-MPA-11/22 : Auteur(s): R.J. Smith and K. Metcalfe (UK)