Résultats de la recherche
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Preliminary aspects of a simulation model to be used for evaluating the experimental crab fishery
Antarctic crab fishery. A simulation model is proposed for conducting this work. Length frequency and catch ... fishery simulation is spatially explicit, and the dynamics of crab abundance are described on a daily ... basis. The simulation includes advective and diffusive movement rates, a lagged Beverton-Holt stock ... recruitment relationship, and a model for catch that contains a random normal deviate. Finally, an algorithm ...
Meeting Document : WG-FSA-94/26 : Auteur(s): G. Watters (USA)
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A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2009/10
881H and 881I, with a reduced catch from 881K due to ice conditions. The catch limit in the north was ... 88.2E, but a slight decline in SSRU 882CDFG over the last two years. We carried out a more detailed ... characterisation of Patagonian toothfish catches for the first time. A total of 124 t of Patagonian toothfish has ... species identification be independently checked through examination of a subsample of otoliths from these ...
Meeting Document : WG-FSA-10/23 : Auteur(s): S.M. Hanchet, M.L. Stevenson and A. Dunn (New Zealand)
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A procedure for krill density estimation
Abstract: This paper is intended to provide a generalised example of a procedure for krill ... density estimation, based on a worked example from the Balleny Islands (WG-EMM-15/17). Explicitly, this ... paper is not the CCAMLR krill density estimation procedure, but has been written as a discussion ... document for the 2016 SG-ASAM meeting. Author(s): M.J. Cox, S. Fielding and A. Constable Title: A ...
Meeting Document : SG-ASAM-16/01 : Auteur(s): M.J. Cox, S. Fielding and A. Constable
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Report on an Antarctic cetacean survey on board a Chilean fishing vessel in February 2016
Abstract: During a CCAMLR endorsed fishing survey on board the Chilean trawler ‘Cabo de Hornos ... ’ around the South Orkney Islands and Elephant Island, a trained marine mammal observer conducted a ... . A total of 44 fin whale (Balaenoptera physalus) groups comprising 61 individuals were recorded on ... effort, and a total of 28 humpback whale (Megaptera novaeangliae) groups comprising 47 individuals. A ...
Meeting Document : WG-FSA-16/19 : Auteur(s): S. Viquerat, H. Herr, K.-H. Kock and P. Arana
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DEVELOPMENT OF A SPATIALLY EXPLICIT AGE-STRUCTURED STATISTICAL CATCH-AT-AGE POPULATION DYNAMICS MODEL FOR MODELLING MOVEMENT OF ANTARCTIC TOOTHFISH IN THE ROSS SEA
Abstract: We present a generalised spatially explicit Bayesian statistical catch-at-age ... a preliminary development version of this model to Antarctic toothfish in the Ross Sea as an age and ... numbers of areas, and is implemented as a discrete time-step state-space model that represents a cohort ... -based population age structure in a spatially explicit manner. The model is parameterised by both ...
Meeting Document : WG-SAM-08/14 : Auteur(s): A. Dunn and S. Rasmussen (New Zealand)
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A proposed research plan for an exploratory fishery for Dissostichus spp. in Division 58.4.3
Abstract: A new fishery was declared for Dissostichus spp in Division 58.4.3 for the 1996197 ... season. Results of a brief survey by an Australian vessel are presented, but catches were very low. A new ... proposal for an exploratory fishery in Division 58.4.3 is presented. This involves a random stratified ... trawl survey to be undertaken in parallel with commercial exploration, and the collection of a ...
Meeting Document : WG-FSA-97/31 : Auteur(s): Williams, R.
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Numerical model of ecosystem including Euphausia superba Dana as a key species in the Antarctic Ocean
Abstract: On the processes to investigate a proper model for understanding the processes that ... govern the biochemical cycle in Antarctic Ocean, we made a research plan as follows: (1) to develop an ... OGCM (Ocean General Circulation Model) (2) to develop a one dimensional ecosystem model that can be ... ecology (4) to develop a numerical model to couple the OGCM and ecosystem models (5) to develop a ...
Meeting Document : WG-EMM-95/52 : Auteur(s): Naganobu, M., Kishi, M.J.
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A multivariate approach to examining patterns in research fishing activities using the SSRU 88.2A–B North survey as an example
Abstract: The WG-SAM in 2016 “agreed the importance of identifying a set of diagnostics and clear ... criteria to assess the likelihood that a vessel is operating as would be expected in normal research ... activities”, further noting that a characterisation of fishing activities was also required in order to ... achieve such a goal (WG-SAM 2016, paragraph 4.19). In this paper, we further develop the analysis of Large ...
Meeting Document : WG-FSA-16/46 : Auteur(s): S. Mormede, A. Dunn, S.J. Parker, T. Earl, C. Darby, M. Söffker and O.R. Godø
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Towards a strategic framework for assessing uncertainty in ecosystem dynamics models: objectives are sensitive too
of the precautionary catch limit for krill. Foosa might therefore be a suitable simulation platform ... for evaluating feedback management approaches. Although Foosa resembles a minimum realistic model, it ... . There is a global need to develop strategic frameworks for assessing uncertainty in ecosystem dynamics ... models. Such a framework could incorporate elements of the evaluation of Foosa, but it should also ...
Meeting Document : WG-EMM-12/20 Rev. 1 : Auteur(s): S. Hill and J. Matthews (United Kingdom)
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A distribution-free model of length-frequency distribution to inform fishery stratification for integrated assessments
Abstract: Length frequency distributions (LFD) of catch collected as a random sub-sample from ... /or gear specific selectivity. A distribution-free model of LFD is described which is fitted to the ... set of length quantiles L for a predetermined set of corresponding probabilities P (in this instance ... fish. The L s were modelled as a Gaussian response variable using a Generalised Additive Mixed Model ...
Meeting Document : WG-SAM-13/18 : Auteur(s): S. Candy, P. Ziegler and D. Welsford (Australia)