Search results
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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 : Author(s): R. Casaux and E. Barrera-Oro (Argentina)
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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 : Author(s): J.M. Fenaughty (New Zealand)
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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 : Author(s): G. Robertson, B. Wienecke, K. Lawton and B. Baker (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 : Author(s): E. Marschoff and B. Gonzalez (Argentina)
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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 : Author(s): J. Clarke, C. Southwell and L.M. Emmerson (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 : Author(s): S. Mormede (New Zealand)
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Results of the research fishing activities conducted by Chile in Management A of Subarea 48.3 from 2005–2008: the importance of conserving the big older fishes
Abstract: This research makes a contribution to the Agenda Item 8 of the WG-FSA. (Biology ... , ecology and demography of target and by-catch species) and shows the response of the local population of ... Dissostichus eleginoides (TOP) from the Area management A (subarea 48.3), after 4 year of closure (2004 to 2008 ... ). We noted an increase in the CPUE overtime, mainly associate with the increase in the median size of ...
Meeting Document : WG-FSA-10/35 : Author(s): C.A. Moreno and P. Rubilar (Chile)
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Modelling growth and reproduction of Antarctic krill: implications of spatial and temporal trends in temperature and food for ecosystem-based management of krill fisheries
Abstract: Errors in the growth model used in stock assessments of Antarctic krill, specifically ... higher rates of growth than occur in reality, could inadvertantly lead to over-exploitation of the krill ... population and cause impacts on krill predators. We review the three classes of models available for ... modelling krill growth – the von Bertalanffy class, the moult-cycle class based on measures of the duration ...
Meeting Document : WG-EMM-12/38 : Author(s): A.J. Constable and S. Kawaguchi (Australia)
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On the possibility of practical utilisation of krill target strength TS in situ obtained on the basis of EK-500 measurements
Abstract: Comparative analysis of krill length distribution in the echosurvey area, obtained with ... trawl and acoustic methods is presented. Besides, the acoustic estimate of krill length composition was ... obtained on the basis of the empiric model by Greene et al. (1991) using estimates of target strength in ... situ at the frequency of 120 kHz as measured with echosounder EK-500 (split-beam) principle). Krill was ...
Meeting Document : WG-EMM-98/19 : Author(s): S.M. Kasatkina (Russia)
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Variation of ice edge position in western part of Atlantic sector of the Antarctic
Abstract: Satellite imagery of the pack ice edge position in western part of the Atlantic sector ... of the Antarctic derived on each tenday period basis has been used to analyse its spatial and ... temporal variation in the area between 65° and 20°W. Amplitude of the seasonal variation of the ice edge ... position was found to increase from the west to the east. Described is two-year cyclicity of consecutive ...
Meeting Document : SC-CAMLR-VIII/BG/49 : Author(s): Delegation of USSR