Résultats de la recherche
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A RISK ASSESSMENT TO ADVISE ON STRATEGIES FOR SUBDIVIDING A PRECAUTIONARY CATCH LIMIT AMONG SMALL-SCALE MANAGEMENT UNITS DURING STAGE 1 OF THE STAGED DEVELOPMENT OF THE KRILL FISHERY IN SUBAREAS 48.1, 48.2, AND 48.3.
Abstract: We used Foosa and the reference set of parameterizations developed by Watters et al ... . (2008) to assess the risks and tradeoffs associated with various management strategies for subdividing ... the precautionary krill catch limit among SSMUs in Area 48. Our methodological approach follows ... directly from specifications made by the WG-SAM and the WG-EMM. We predict that the tradeoffs inherent in ...
Meeting Document : WG-EMM-08/30 : Auteur(s): G.M. Watters, J.T. Hinke (USA) and S. Hill (United Kingdom)
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Relationship between distribution of Antarctic krill (Euphausia superba) and environmental index MTEM-200 in the Antarctic Ocean throughout the year
Abstract: Antarctic krill (Euphausia superba) is the key species of the Antarctic marine ... oceanographic conditions have been an age-old recurrent problem and many papers have been published on the ... subject since the British Discovery Reports. However, there was no remarkable achievement in particular ... the entire Antarctic Ocean. To clarify the relationship between krill distribution of krill and ...
Meeting Document : WG-EMM-08/32 : Auteur(s): M. Naganobu, T. Kitamura and K. Hasunuma (Japan)
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OTOLITH-BASED AGEING OF THE PATAGONIAN TOOTHFISH (DISSOSTICHUS ELEGINOIDES) FOR THE HEARD AND MCDONALD ISLANDS: MODELLING FIXED AND RANDOM READER ERROR USING MULTIPLE READINGS OF A REFERENCE COLLECTION
calibration require an ageing error matrix as input in order to adequately account for uncertainty in the data ... resulting from the imprecision of age determination using annual ring counts from otoliths. This paper ... describes the methods and results used to provide an ageing error matrix to the HIMI toothfish integrated ... assessment using repeat readings by 4 readers of a set of 203 reference otoliths sampled from the HIMI ...
Meeting Document : WG-SAM-09/07 : Auteur(s): S.G. Candy, G.B. Nowara, D.C. Welsford and J.P. McKinlay (Australia)
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Analysis of the stomach content in the blue-eyed shag Phalacrocorax atriceps bransfieldensis at Nelson Island, South Shetland Islands
Abstract: Forty stomach contents of the blue eyed shag Phalacrocorax bransfieldensis were sampled ... at Nelson Island, South Shetland Islands, in January 1994. The analysis of the diet showed that fish ... were by far the main component, followed by octopods, polychaetes and gammarids. Notothenia coriiceps ... , predominated in frequency (58%) and in weight (65%), whereas Nototheniops nudifrons was the most important by ...
Meeting Document : WG-CEMP-94/31 : Auteur(s): N. Coria, R. Casaux, M. Favero and P. Silva (Argentina)
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An interpretation of the growth of the Adelie penguin rookery at Cape Royds, 1955-1990
Abstract: The population dynamics of the Cape Royds rookery were modelled by computer, in order ... to determine the probable causes of the dramatic increase since 1980 in the numbers of Adelie ... penguins, Pygoscelis adeliae, breeding in the Ross Sea region, Antarctica. Variations in the extent of sea ... -ice around the rookery during incubation and chick rearing cannot feasibly explain the population ...
Meeting Document : WG-CEMP-92/21 : Auteur(s): N. Blackburn (Denmark), R.H. Taylor and P.R. Wilson (New Zealand)
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A simulation study of the method of refining the natural mortality coefficient with Champsocephalus gunnari in Subarea 48.3 used as an example
Abstract: The method of refining the natural mortality coefficient is based on the notion that ... the free component of the regression equation between the mean-weighted coefficient of natural ... mortality as defined by the VPA and fishing effort must be equal to zero if the natural mortality ... shown that the proposed method facilitates such a refinement. When a mistake is made in the choice of ...
Meeting Document : WG-FSA-91/25 : Auteur(s): P.S. Gasiukov and R.S. Dorovskikh (USSR)
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Further development of pairwise tag detection performance index and its application to the stock assessment of toothfish in the Ross Sea fishery
sustainable yields. The assessment model assumes that all vessels have equal tag detection rates; as a ... ) could lead to an over-estimate of the stock biomass. In this paper we develop further an index of vessel ... -specific tag detection performance for the Ross Sea fishery using a case-control methodology which controls ... for the inter-annual spatial and temporal variability of commercial fishing operations from which tags ...
Meeting Document : WG-SAM-13/34 : Auteur(s): S. Mormede (New Zealand)
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A spatially explicit population dynamics operating model for Antarctic toothfish in the habitable depths of the Ross Sea region
Antarctic toothfish in the Ross Sea region, for a medium scale spatial resolution (189 spatial cells ... ) covering the Ross Sea region. In this model run we spatially restrict the stock to cells where at least 5 ... % of the depth is deemed suitable as habitat for toothfish (120 cells – semi-restricted model), and ... compare with previous models where the stock was either restricted to the fished cells only (65 cells ...
Meeting Document : WG-FSA-13/53 : Auteur(s): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)
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Updating the 2017 stock assessment of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region
Abstract: The Antarctic toothfish stock assessment for the Ross Sea region (Subareas 88.1 and ... 88.2AB) will be updated in 2017. The introduction of CM 91-05 (the Ross Sea region Marine Protected Area ... ) will require modifications to the previous method the estimation of catch splits in the calculation of ... precautionary yields. In addition, work will need to be carried out in the longer term that consider how the ...
Meeting Document : WG-SAM-17/41 : Auteur(s): S. Mormede and S. Parker
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Mesozooplankton distribution and community structure in the Pacific and Atlantic sectors of the Southern Ocean during austral summer 2017/18: a pilot study conducted from Ukrainian longliners
Abstract: Preliminary results of the pilot study of the mesozooplankton in the region between the ... were collected in the top 100 m water layer using vertical tows of the 0.1 m-2 Juday net from four ... Ukrainian longliners operating during the Antarctic toothfish fishery. While providing basic information on ... the zooplankton density, distribution, community composition and seasonal dynamics, this pilot study ...
Meeting Document : WG-FSA-18/19 : Auteur(s): E.A. Pakhomov, L.K. Pshenichnov, A. Krot, V. Paramonov, I. Slypkо and P. Zabroda