Résultats de la recherche
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The use of Antarctic shags to monitor coastal fish populations: evaluation and proposals after five years of test of a standard method
Abstract: This overview reflects the main points of the feasibility of using the Antarctic Shag ... as a monitor of inshore demersal fish populations, including species of commercial importance ... . Likewise, the history of the development of this theme in relation to the EMM and FSA Working Groups of ... CCAMLR since the onset of the 1990s until the recent five year testing period of the Standard Method, is ...
Meeting Document : WG-EMM-03/5 : Auteur(s): R. Casaux and E. Barrera-Oro (Argentina)
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The results of performance of tagging programs of the Korean exploratory fishery for Dissostichus spp. in 88.1 in the 2010/11 season
presented the results from the fisheries and comparison of statistics in each SSRU. Total catch including by ... the total catches in 78 hauls while by-catches were 133 fish. The CPUEs of Dissostichus Spp. in 88.1 J ... and L appeared dramatic higher rate than the CPUEs in 88.1 B and C. Mean CPUE (number / km) of ... Dissostichus Spp. for total of 78 sets, for instance, was 16.67911. This figure was higher than the figure of ...
Meeting Document : WG-FSA-11/54 : Auteur(s): T. Jung and H.J. Choi (Republic of Korea)
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Detection of systematic change in Adélie penguin foraging trip duration: consequences of high inter-annual variability and usefulness of ice cover as a covariate
Adélie penguin colony with the aim of determining minimum sample sizes required to detect systematic ... temporal change in CEMP Parameter A5 (penguin foraging trip duration). Two different types of systematic ... sudden step change in parameter values from one average level to another. Modelling showed that change of ... the latter form could be more quickly and powerfully detected at a range of effect sizes than could ...
Meeting Document : WG-EMM-05/22 : Auteur(s): J. Clarke, C. Southwell and L.M. Emmerson (Australia)
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Notification of research-in-progress in an Australian tuna fishery of relevance to the conservation of Convention Area seabirds
Abstract: This purpose of this document is to inform CCAMLR of work-in-progress in the Australian ... eastern tuna and billfish fishery (ETBF) of potential relevance to the conservation of Convention area ... determine the effect of line weighting regimes and bait type on the sink rate of longlines. This experiment ... was completed in April 2005. (b) a manipulative experiment testing the effectiveness of various ...
Meeting Document : WG-FSA-05/13 : Auteur(s): G. Robertson, B. Wienecke, K. Lawton and B. Baker (Australia)
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Investigation of the sensitivity of the Ross Sea toothfish assessment to withholding subsets of the available data
model outputs of withholding from a stock assessment between one and eight years of age frequency and/or ... tag recapture data. Examining the impact of considering a subset of the available data simulates both ... the effect of not updating an assessment every year, and also the evolution of stock assessments with ... time as more years’ data becomes available. The 2009 stock assessment of Antarctic toothfish in the ...
Meeting Document : WG-SAM-11/17 : Auteur(s): S. Mormede (New Zealand)
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AN ASSESSMENT OF ARTIFICIAL BAIT (NORBAIT™) AS A MEANS OF REDUCING THE INCIDENTAL CATCH OF MACROURUS AND OTHER BYCATCH SPECIES IN HIGH LATITUDE TOOTHFISH FISHERIES
assess the effectiveness of artificial bait as a means of reducing the incidental catch of Macrouridae ... to assess basic requirements such as ease of use, bait longevity on the hook, and catchability ... (defined here as a measure of a baited hook to attract and catch a given species of fish) of target and ... Aspiring operating in the waters of South Georgia and the South Sandwich Islands (CCAMLR Statistical ...
Meeting Document : WG-FSA-08/52 : Auteur(s): J.M. Fenaughty (New Zealand)
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Assessment of fishing intensity of krill in Subarea 48.2 during the season of 1989/90
Abstract: The research performed was aimed at assessment of fishing fleet impact upon krill ... population during the months (December-March), being critical to dependent species. The results of fishing ... intensity estimation are presented on the basis of haul to haul commercial statistics for Russian fleet ... (data of 2900 trawlings are used) in the South Orkneys area during December 1989- March 1990. In the ...
Meeting Document : WG-EMM-97/51 : Auteur(s): Ivanova, V.I., Sushin, V.A., Kasatkina, S.M.
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The use of morphometric parameters for the determination of sex of Adelie penguins
Abstract: The ability to determine the sex of Adélie penguins by discriminant analysis of ... morphometric parameters was examined for breeding birds of known sex at Bechervaise Island near Mawson Station ... , Antarctica (latitude 67°36’S, longitude 62°53’E). It was found that 89 % of birds could be correctly sexed by ... , cubitocarpal) with the mean discriminant score of 55.39. Males have a higher score and females a lower one. The ...
Meeting Document : WG-CEMP-91/5 Rev. 1 : Auteur(s): K.R. Kerry, D.J. Agnew, J.R. Clarke and G.D. Else (Australia)
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Optimization of the sampling design in the detection of interannual variability and prey size selectivity in the diet of penguins
Abstract: Based on preliminary results of prey size in Adélie penguins, sampling designs intended ... for detection of interannual variations in prey mean sizes and penguin size related selectivity are ... analysed for the optimal allocation of observations at each level in nested designs. Recommended numbers ... for detection of interannual variability are obtained and a sampling protocol is suggested. A table of ...
Meeting Document : WG-CEMP-90/09 : Auteur(s): E. Marschoff and B. Gonzalez (Argentina)
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Influence of the quality and quantity of data from a multi-year tagging program on bias and precision of biomass estimates from an integrated stock assessment – update
Abstract: By way of simulation, this study investigated how the bias and precision of biomass ... estimates from an integrated tag-based assessment are influenced by various aspects of a multi-year tagging ... program, in particular the effects of the size (tag size-overlap) and numbers of tagged fish, the duration ... of the tagging program, the type of auxiliary data used in the assessment, and the catch history ...
Meeting Document : WG-FSA-12/18 : Auteur(s): P.E. Ziegler (Australia)