Résultats de la recherche
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Further computations of the consequences of setting the annual krill catch limit to a fixed fraction of the estimate of krill biomass from a survey
Abstract: The results of Butterworth et al. (1992) relating potential krill yield to a pre ... -exploitation survey estimate of kril1 biomass are extended to incorporate most of the amendments specified by ... the Third and Fourth Meetings of Working Group on Krill. The most important of these extensions is ... integration over the ranges of uncertainty for a number of the model parameters. Results are provided for the ...
Meeting Document : WG-KRILL-93/42 : Auteur(s): D.S. Butterworth, G.R. Gluckman, R.B. Thomson and S. Chalis (South Africa)
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Hydroacoustic observations of the vertical distribution of icefish Champsocephalus gunnari in the western part of the slope of the South Georgia Island in December 1999–January 2000
Abstract: The dynamics of daily vertical migrations of icefish Champsocephalus gunnari was ... studied and some quantitative estimates were obtained by results of analysis of more than 150 fragments of ... echograms obtained with the use of an echograph of the "Priboi-101" echo sounder during the ... concentrations of icefish can be considered by the type of the vertical distribution as bottom/pelagic ones, and ...
Meeting Document : WG-FSA-00/19 : Auteur(s): V.L. Senioukov (Russia)
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Further computations of the consequences of setting the annual krill catch limit to a fixed fraction of the estimate of krill biomass from a survey
Abstract: The results of Butterworth et al. (1991) relating potential krill yield to a pre ... -exploitation survey estimate of krill biomass are extended as specified by the Third Meeting of Working Group ... on Krill. The most important of these extensions is integration over the ranges of uncertainty for a ... number of the model parameters. Results are provided for the probability of spawning biomass falling ...
Meeting Document : WG-KRILL-92/04 : Auteur(s): D.S. Butterworth, G.R. Gluckman and S. Chalis (South Africa)
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Integrating CPUE with the GY model: examination of the effects of shortening the CPUE series and incorporating elements of uncertainty into the D. eleginoides assessment of Subarea 48.3
2003, paragraph 2.27). This paper explores some of the consequences of shortening the dataset in the ... application of the usual assessment method. In addition we investigate the incorporation of uncertainty in the ... standardised CPUE series into the method of Kirkwood and Constable (2000) via Monte Carlo simulations of the ... CPUE series. Truncation of the standardised series from WG-FSA 2002 results in only slight modification ...
Meeting Document : WG-FSA-03/96 : Auteur(s): I.R. Ball, S. Candy and A.J. Constable (Australia)
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The utility of satellite remote sensing for identifying the location and size of penguin breeding sites in Antarctica: a review of previous work and specifications of some current satellite sensors
Abstract: Broad-scale survey of the abundance of colonial breeding penguins requires locating all ... , or the great majority, of colonies as the first of several survey stages. Given the remoteness of ... . Past evaluations of the utility of satellites for the detection of penguin breeding sites are reviewed ... with respect to the following issues: spectral response of surrounding material, variability in the ...
Meeting Document : WG-EMM-03/51 : Auteur(s): C. Southwell and L. Meyer (Australia)
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VME detection thresholds: provision of a beta version of a R library to compute detection probabilities and preliminary results on the case of the sea pens (Pennatulacea) of the CCAMLR Division 58.4.4b
, the data are reported to the Secretariat to inform the CCAMLR about the potential presence of VME to ... of sea pens (Pennatulacea, NTW, VME bioindicator) in the 58.4.4b sector have been reported during the ... CCAMLR SAM Working Group 2018. However, despite the important level of the catches, no VME detection ... threshold triggering out the establishment of an immediate fishing exclusion zone have been reached. Here ...
Meeting Document : WG-FSA-2019/46 : Auteur(s): A. Martin and M. Eléaume
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Testing the performance of a recompiled version of TrawlCI to calculate confidence intervals of abundance in surveys of Patagonian toothfish (Dissostichus eleginoides) and mackerel icefish (Champsocephalus gunnari)
Abstract: A version of the confidence interval calculating program TrawlCI was recompiled to ... enable it to be run within the DOS emulator of recent versions of the Microsoft Windows operating system ... . The performance of the recompiled version was compared with that of the original version. The ... recompiled version of TrawlCI produced very similar, though not identical, results to the original version ...
Meeting Document : WG-FSA-SAM-05/14 : Auteur(s): T.D. Lamb, W.K. de la Mare and A.J. Constable (Australia)
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DEVELOPING FOUR PLAUSIBLE PARAMETERISATIONS OF FOOSA (A SO-CALLED REFERENCE SET OF PARAMETERISATIONS) BY CONDITIONING THE MODEL ON A CALENDAR OF EVENTS THAT DESCRIBES CHANGES IN THE ABUNDANCES OF KRILL AND THEIR PREDATORS IN THE SCOTIA SEA
Abstract: We tuned four parameterizations of Foosa to provide predictions that are consistent ... with the agreed calendar, as specified by the WG-SAM, that describes changes in the abundances of krill ... and their predators in the Scotia Sea. First, we compiled a set of base parameterizations from ... parameterizations cover a combinatorial framework that considers krill movement (or lack thereof) and the shape of a ...
Meeting Document : WG-EMM-08/13 : Auteur(s): G.M. Watters, J.T. Hinke (USA) and S. Hill (United Kingdom)
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Estimating the biodiversity of the sub-Antarctic Indian part for the ecoregionalisation of CCAMLR areas 58.5.1 and 58.6: Part II. foraging habitats of top predators from French Antarctic Territories – areas of ecological significance in the Southern Ocean
Abstract: Preliminary analysis of long term dataset on individual tracking of 19 species of ... identify area of importance for conservation in the Southern Ocean. The preliminary results on locations ... data show that top predators are largely distributed on the southern part of the Indian Ocean from the ... Ocean Tuna Commission-IOTC, Commission for the Conservation of Southern Bluefin Tuna-CCSBT, Southern ...
Meeting Document : WS-MPA-11/08 : Auteur(s): K. Delord, C. Bost, C. Guinet and H. Weimerskirch (France)
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KRILL CATCHES INDICATE THE IMPACT OF THE EL-NIŇO – SOUTHERN OSCILLATION RELATED PROCESSES ON THE DISTRIBUTION OF KRILL BIOMASS BETWEEN SUBAREAS OF THE ATLANTIC SECTOR OF ANTARCTIC
different climate oceanographic regimes and its influence on krill biomass into the discussion of krill ... used to analyze the influence of the El-Niňo – Southern Oscillation (ENSO) related processes on the ... inter-annual variation of krill biomass distribution between the major statistical subareas. The ... analysis suggest that the dynamics of krill biomass in fishable aggregations in Subareas 48.1 and 48.2 is ...
Meeting Document : WG-EMM-09/47 : Auteur(s): V. Spiridonov (Russia)