Résultats de la recherche
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Steepness for Antarctic toothfish (Dissostichus mawsoni) based on life history
Abstract: Although steepness is typically considered a convenient re-parametrization of a stock ... steepness in a stock assessment. We take the first step towards a consistent treatment of steepness for ... Antarctic toothfish by showing how to compute a frequency distribution of steepness based on life-history ...
Meeting Document : WG-FSA-14/32 : Auteur(s): M. Mangel, J. Brodziak and G.M. Watters (USA)
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Technical note on the sampling procedures of the Saga Sea
that a Norwegian-flagged vessel, “Saga Sea” would be fishing for krill in the 2005/06 fishing season ... considered a ‘new and exploratory fishery’ if a monitoring system was implemented that provided adequate ... response to these concerns a monitoring system has been developed in collaboration between Norway’s ... onboard by a UK CCAMLR Scientific and National Observers. Author(s): J. Hooper (United Kingdom), T ...
Meeting Document : WG-EMM-06/18 : Auteur(s): J. Hooper (United Kingdom), T. Knutsen (Norway), D. Agnew (United Kingdom) and S.A. Iversen (Norway)
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Joint SC-CAMLR and SC-IWC Workshop, its format and draft Terms of Reference
Abstract: A proposal for a Joint SC-CCAMLR IWC Workshop to develop multi-species models of the ... Antarctic marine ecosystem was proposed at the SC-CCAMLR 2014, and a steering group for the Workshop was ... availability, and the second as a comprehensive discussion of approaches in relation to modelling and ... monitoring. The steering group was tasked to develop a draft terms of reference for the workshops to be ...
Meeting Document : SC-CAMLR-XXXIV/BG/33 : Auteur(s): Co-conveners of the Joint SC-CAMLR and SC-IWC Workshop
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The identification of scientific reference areas in the wider context of MPA planning – report of the CCAMLR scholarship recipient
identification of a comprehensive network of reference areas across environmental gradients can play a major role ... in Domain 1, including integrating programmes such as SOOS, are a strong foundation on which to build ... scientific reference areas and facilitate coordination and cooperation among Members, as part of a Research ... and Monitoring Plan for D1MPA. Author(s): A. Capurro, M.M. Santos, R. Cavanagh and S. Grant Title ...
Meeting Document : WS-SM-18/17 : Auteur(s): A. Capurro, M.M. Santos, R. Cavanagh and S. Grant
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Long-term changes in the size composition of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps at Potter Cove, after the 1978–1980 fishery in the area
years. After 1991/92 the densities, mean sizes and abundances do not depend on a single forcing event ... but on several interacting factors. The length data of G. gibberifrons, available from 1986, show a ... decrease until 1991/92, exhibiting a similar pattern to that of N. rossii. After a period of relative ... stability in mean sizes (1992-1994) a sharp increase is associated with a continuous decline in relative ...
Meeting Document : WG-FSA-07/52 : Auteur(s): E.R. Marschoff, E.R. Barrera-Oro and N.S. Alescio (Argentina)
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Preliminary investigations of an assessment model for skates and rays in the Ross Sea
attempted to create a catch history of all skates and rays in the Ross Sea, and integrate these data with ... the available observational data (including tag-recapture data) into a single integrated stock ... , steepness, and size and age at maturity. The applicability of a general model, such as presented here, to a ... multi-species catch has not been investigated. While is it plausible that a general model may be ...
Meeting Document : WG-SAM-07/4 : Auteur(s): A. Dunn, S.M. Hanchet, S.L. Ballara and M.P. Francis (New Zealand)
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea including data from the 2005/06 season
reference case resulted in a much higher estimate of initial biomass, though this appeared to be almost ... those presented in 2005. The inclusion of the 2005 tag-release and the 2006 tag-recapture data had a ... small effect that slightly modified estimates from the models, suggesting that the new data had a ... are also presented. Inclusion of all vessels tagging data resulted in a more optimistic assessment ...
Meeting Document : WG-FSA-06/60 : Auteur(s): A. Dunn and S.M Hanchet (New Zealand)
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Defining predator foraging ranges, illustrated using Adélie penguin foraging tracks from Mawson coast
likely to be foraged by predators from one year to the next, i.e. what is a predator’s feeding range ... location/time recordings from a satellite tracking system. This data is used to generate a map of feeding ... effort and this is used to delineate a feeding ground for Adélie penguins on the Mawson coast in eastern ... . summer vs winter. The second part is to establish the combined foraging ranges across a number of species ...
Meeting Document : WG-EMM-02/41 : Auteur(s): I.R. Ball, A.J. Constable, J. Clarke and L. Emmerson (Australia)
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Modelling Southern Ocean krill population dynamics: biological processes generating fluctuations in the South Georgia ecosystem
Abstract: Variability is a key feature of the pelagic ecosystems of the Southern Ocean and an ... dynamics in the observed variation. Here, analyses of a model of krill population development and predator ... . The krill population model was combined with a size-based selection function and used to generate ... expected length-frequency distributions in the predator diet through a summer season. Comparison of the ...
Meeting Document : WG-EMM-01/53 : Auteur(s): E. Murphy and K. Reid (United Kingdom)
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Modelling the dynamics of krill populations in the Antarctic Peninsula region
population dynamics of krill and estimate the expected mortality rates. A number of models of the population ... the bulk density estimates and uses a non-linear regression method to estimate the mortality rate. The ... second method develops a fully age-structured population model and uses only the recruitment data to ... develop a model of the long-term dynamics. Data on the recruitment of the first and second age groups were ...
Meeting Document : WG-EMM-99/56 : Auteur(s): E.J. Murphy (United Kingdom), A. Constable (Australia) and D. Agnew (United Kingdom)