Resultados de la búsqueda
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Stock size and tac estimation for the Patagonian toothfish, Dissostichus eleginoides, from the Kerguelen Islands area
and TAC estimation of the Patagonian toothfish, Dissostichus eleginoides, from the Kerguelen shelf ... area. Method of R. Jones (1964) was used for estimating population size and TAC. Calculations were done ... of D. eleginoides for these seasons was estimated at 43-50 x 103 tonnes. TAC was estimated at 7.3-7.5 ...
Meeting Document : WG-FSA-92/09 : Autor(es): S.M. Pronenko, P.B. Tankevich, V.V. Gerasimchuk and V.N. Chikov (Ukraine)
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How many krill should we measure?
on its body length distribution. Krill samples collected from layers in the northern waters of ... measurements of 2000 animals per sample, comparisons were made in mean body length and cumulative frequency ... distribution with less number of measurements. Measurements on 50 animals seem enough to obtain reliable ...
Meeting Document : WG-KRILL-90/26 : Autor(es): Y. Endo (Japan)
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRUs 88.2C–H for the years 2002–03 to 2012–13
Abstract: This paper presents the Bayesian sex and age structured population stock assessment of ... 88.2C–H). We examined several models including the 2013 implementation of the 2011 base case (R1), using ... biomass than previously estimated, mainly due to the signal in the last three years of tag data. These are ... the data in which we have the highest degree of confidence for this fishery, due to improvements in ...
Meeting Document : WG-FSA-13/52 : Autor(es): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)
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Integrated weight longlines with paired streamer lines – best management practice for demersal longline fisheries: preliminary results
Abstract: Minimizing the time gear is available to seabirds by increasing the sink rate of ... practical seabird mitigation device using multiple criteria: catch rates of seabirds and fish, seabird ... behaviour, sink rate of the gear and breaking strength. All mitigation technologies dramatically decreased ... difference did not manifest itself in the context of commercial fishing as increased line separations. We ...
Meeting Document : WG-FSA-06/52 : Autor(es): K. Dietrich, E. Melvin and L. Conquest (USA)
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Age-structured production model for toothfish at South Georgia
through the introduction of a new annual selectivity function, modelled as a unimodal, algebraically ... decaying function of age, with three easily interpretable parameters. When only a single selectivity curve ... reaches preset parameter boundaries. With one or two parameters of the selectivity estimated only once the ... the CPUE very closely. Convergence problems were noted for the highly parameterised versions of this ...
Meeting Document : WG-FSA-SAM-05/18 : Autor(es): A. Payne, G.P. Kirkwood, R. Hillary and D.J. Agnew (United Kingdom)
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Phytoplankton standing stocks in relation to krill in Antarctic waters
, consisting of 32 diatoms and one dinoflagellete. Chaetoceros and Nitzschia spp. dominated the phytoplankton ... proliferation of certain phytoplankton species to bloom condition. Zooplankton biomass showed wide fluctuation ... to 2400 kg, the percentage of kill occurrence varied from 0 to 100% at stations sampled. The ... phytoplankton and zooplankton in the region of krill swarm however showed active feeding by the latter on these ...
Meeting Document : WG-EMM-98/34 : Autor(es): X.N. Verlecar, R. Vijayakumar, F. Saldhana and L. Martins (India)
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Potential modelling structures for a two-area stock assessment model for Antarctic toothfish (Dissostichus mawsoni) in the Amundsen Sea Region
estimation of biomass in SSRUs 88.2C–G. Additional data resulting from a two-year research plan implemented ... in 2014/15 are expected to better inform the assessment of the entire stock including SSRUs 88.2C–G ... was annually-varying or density-dependent migration. Finally, using subsets of the data, or excluding ... once additional age and tag data have been collected in SSRUs 88.2C–H as part of the two-year research ...
Meeting Document : WG-SAM-15/49 : Autor(es): S. Mormede, S.J. Parker, A. Dunn and S.M. Hanchet (New Zealand)
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On marine protected areas in the Southern Ocean
Abstract: The details on designation of marine protected areas in the CCAMLR region are ... of climate change influence on ecosystems. The MPA Questionnaire is proposed for consideration to ... make easier the understanding of the Southern Ocean MPA designation process and problems. Author(s ...
Meeting Document : WS-MPA-11/13 : Autor(es): G.P. Milinevsky and S.B. Kovalonok (Ukraine)
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CEMP INDICES: 2008 UPDATE
indicator species collected by standard methods in the three Integrated Study Regions of the Convention Area ... . Each year the Secretariat updates the standardised index values and provides a summary of trends and ... seasons are being undertaken. There has been a general decline in the number of parameters submitted from ...
Meeting Document : WG-EMM-08/04 : Autor(es): Secretariat
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Can we improve the Scientific Committee’s ability to provide unequivocal management advice on fish stocks in the Convention Area?
knowledge of the stocks and improve the Scientific Committee’s ability to provide less controversial ... management advoice. However, a level of uncertainty higher than in fish stock assessment in other parts of ...
Meeting Document : WG-FSA-90/25 : Autor(es): Convener, Working Group on Fish Stock Assessment