Résultats de la recherche
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Physical forcing in the southwest Atlantic: ecosystem control
Abstract: In the southwest Atlantic sector of the Southern Ocean, temporal variability in the ... temperature at South Georgia shows the presence of high levels of autocorrelation, with periodicity evident in ... physical environment has been recorded since the early part of the last century. For example, ocean ... anomaly data for the El Niño 4 region in the Pacific show that variability at South Georgia also reflects ...
Meeting Document : WG-EMM-04/34 : Auteur(s): P.N. Trathan, E.J. Murphy, J. Forcada, J.P. Croxall, K. Reid and S.E. Thorpe (United Kingdom)
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Proposal for an extension to the mark recapture experiment to estimate toothfish population size in Subarea 48.4
assessment of D. eleginoides stock size in the Northern Area of 48.4 estimates a vulnerable biomass of ... 48.4 in the 2008/09 fishing season so as to allow for a full assessment of D. eleginoides stock size in ... introduced for bycatch species in the Northern Area of 48.4, set at 16% Macrourus spp. and 5% Rajid spp of ... between 1,000 to 2,000 tonnes. 3. The UK proposes to continue the mark-recapture experiment in Subarea ...
Meeting Document : WG-FSA-08/46 : Auteur(s): J. Roberts and D. J. Agnew (UK)
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KRILL FISHERY BEHAVIOUR IN THE SOUTHWEST ATLANTIC
to year variability in the probabilities of operating within a local range after a number of tows. In ... /operational requirements in an area. These kinds of analysis show the importance of good year-round data from ... behaviour of krill fishery. Analysis of travel distance in relation to catch level revealed a pattern that ... close even after considerable number of hauls. The scales of distance after 50 tows from the original ...
Meeting Document : WG-EMM-08/39 : Auteur(s): S. Kawaguchi (Australia)
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DEFINING TAG RATES AND TACS TO OBTAIN SUITABLY PRECISE ABUNDANCE ESTIMATES FOR NEW AND EXPLORATORY FISHERIES IN THE CCAMLR CONVENTION AREA
formula that gives the expected coefficient of variation of the abundance estimate in terms of the number ... of releases and recaptures, which can in turn be expressed in terms of the tagging rate per tonne ... given precision in the Petersen abundance estimate. To show the reliability of the precision ... be extremely useful in terms of defining suitable catch levels and tagging rates required to obtain a ...
Meeting Document : WG-SAM-08/06 : Auteur(s): R.M. Hillary (UK)
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An integrated stock assessment for the Patagonian toothfish (Dissostichus eleginoides) in Division 58.5.2 using CASAL
datasets and to the choices of parameters used in both the stock assessment and projections. It is ... Division 58.5.2. It updates the model used at WG-FSA in 2006 using data from the 2007 season as well as ... 2006 data not available for WG-FSA in 2006. It also includes the following refinements: (i) estimation ... of the coefficient of variation (CV) for length given age, (ii) use of non-informative priors for ...
Meeting Document : WG-FSA-07/53 Rev. 1 : Auteur(s): S.G. Candy and A.J. Constable (Australia)
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Upward adjustments to local catch limits for the krill fishery in Subarea 48.1
the gSSMUs defined in another compilation of vignettes (AERD 2016a, pp. 3-13). We propose upward ... greater than one. We advocate real-life testing of the ideas proposed here to prove the concept; in ... adjustments to local catch limits for the krill fishery in Subarea 48.1. We use the term local catch limit to ... refer to a catch limit that applies to a group of SSMUs (gSSMU), and the work presented here is based on ...
Meeting Document : WG-EMM-16/47 : Auteur(s): Antarctic Ecosystem Research Division, Southwest Fisheries Science Center and NOAA Fisheries
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Ukrainian complex marine expeditions in the Southern Ocean
measuring systems, and this is one of the most prominent examples of public-private partnership in Antarctic ... research. In particular, during the marine expedition, continuous monitoring of the physical and chemical ... -term monitoring of the spread of polluting chemicals in coastal ecosystems, as well as prediction of ... zones of increased biological productivity in the CAMLR Convention Area. Author(s): E. Dykyi, V ...
Meeting Document : WG-EMM-2019/62 : Auteur(s): E. Dykyi, V. Komorin and A. Fedchuk
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Gentoo penguin (Pygoscelis papua) population winter/summer behaviour and CEMP time-lapse cameras validation at Galindez Island in the 2018/19 season
station (Galindez Island), GAI CEMP site, provided daily observations of 15 gentoo nests chosen in the ... during 2018-19 season. The detailed observation of bird arrival, nesting, hatch and crèche has been ... provided in two colonies at GAI CEMP site at Galindez Island nearby the Vernadsky station. We inform on the ... results of visual survey of penguin population and penguin count. During the 2018/19 season biologist ...
Meeting Document : SC-CAMLR-38/BG/13 : Auteur(s): Delegation of Ukraine
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region to 2018/19
in the number of tags recaptures in 2018 and 2019; (ii) two years of additional fishing as the ... (MCMC) diagnostics suggested no evidence of non-convergence in the key biomass parameters. Patterns of ... residuals in the age-frequency proportions suggested some evidence of either strong and weak year class ... (Dissostichus mawsoni) in the Ross Sea region (Subareas 88.1 and SSRUs 88.2A-B) is updated and revised using the ...
Meeting Document : WG-FSA-2019/08 : Auteur(s): A. Dunn
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Finfish distribution and abundance in Subareas 48.1 and 48.2, 2016–2018. Research proposal for the second year
Abstract: According to the experience gained in the first phase of the research and observations ... made by WG-SAM-16, a new proposal is provided to determine the distribution and abundance of fish in ... in each stratum depth. With the data obtained in each subarea, the density of fish resources will be ... determined using the Delta method. Additionally, in a delimited sector north of Elephant Island, the catch ...
Meeting Document : WG-FSA-16/31 : Auteur(s): Delegation of Chile