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Investigation of bias in the mark–recapture estimate of toothfish population size at South Georgia
) and upwards in a low-density box, so that they tended to be retained in high-density boxes. The model ... of the toothfish stock in Subarea 48.3. Document WG-FSA-04/82. CCAMLR, Hobart, Australia. Agnew ... that they tended to be retained in high-density boxes. The model allows simulation of releases by box ... overestimate of it. Résumé Ce document examine l’influence du mélange de poissons et la distribution ... -estimation de la taille réelle de la population. Bien qu’il ne soit pas recommandé, dans le présent document ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 47–63 : Автор(ы): Agnew, D.J., G.P. Kirkwood, J. Pearce and J. Clark
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A balanced model of the food web of the Ross Sea, Antarctica
Antarctic toothfish in the Ross Sea stock to be 79.9% (95% confidence intervals: 77.7–82.2%) of the virgin ... (unfished) biomass, so that changes from the unfished state may be relatively small as yet. The modelling ... literature tend not to be self consistent so that expert opinion and/or numerical techniques are used to ... catch and modelling data, it is estimated that the study area contains 86% of the biomass of tooth ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 1–31 : Автор(ы): Pinkerton, M.H., J.M. Bradford-Grieve and S.M. Hanchet
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e-sc-xii-a5.pdf
... version in WG-FSA-93/29 and that provided in WG-FSA-91/27 for the period 1982/83 to 1985/86. Table 8 ... catch-at-age from WG-FSA-91/27 over the period 1982/83 to 1985/86 indicated substantially higher ... As in the past, the Convener suggested that the required assessments be undertaken in small task ... general nature and, in particular, high seas fisheries and straddling stocks, a topic to be considered by application/pdf attached to:WG-FSA-93
Meeting Report : WG-FSA-93
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e-sc-38-a4.pdf
... . The timescale for achieving the target of 50% B0 may be long if the stock is depleted. Details of the ... model and B0 was higher. 126 3.2 The Working Group noted that although this assessment was ... -specification, and hence may not be precautionary. The Working Group recalled that likelihood profiles ... would be required to identify the most influential data on estimates of M. 3.3 The Working Group noted application/pdf attached to:WG-SAM-2019
Meeting Report : WG-SAM-2019
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A simple approach for calculating the potential yield of krill from biomass survey results
relative values of the ages at maturity and first-capture. Seasonal effects seem to be of lesser importance ... of the ages at maturity and first-capture. Seasonal effects seem to be of lesser importance ... ~HMOMY, npe~CTaBJI5IIOT MeHbllIYIO Ba)l{HOCTb. * Department of Applied Mathematics, University of Cape ... suggested that a possible approach to the determination of appropriate yields might be to use the formula ... calculations should be repeated for krill in a manner which takes account of seasonal growth variation, for a ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 207–217 : Автор(ы): Butterworth, D.S., A.E. Punt and M. Basson
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e-sc-xiv-a5.pdf
... ) APPENDIX H: Draft Outline of Information to be Included in Scientific Observer Summaries to CCAMLR ... seem to be particularly effective. Further discussion of this problem is reported in section 11 ... information was likely to yield data which could be submitted to CCAMLR in the near future. The Working ... unit effort (CPUE) to be performed across fleets and years (Appendix E, paragraphs 3.5 to 3.8 application/pdf attached to:WG-FSA-95
Meeting Report : WG-FSA-95
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Fatty acid and stable isotope analyses to infer diet of Antarctic toothfish caught in the southern Ross Sea
toothfish is also considered to be a prey of Weddell seals (Leptonychotes weddellii) and killer whales ... particular point in time and space, usu- ally during the brief summer season when samples can be collected ... inferring the diet of top trophic level organ- isms (Drazen et al., 2009). Biomarker profiles can be ... compared to potential prey and the level of similarity between profiles can be used to infer a trophic ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 21–36 : Автор(ы): Jo, H.-S., I. Yeon, C. Lim, S.M. Hanchet, D.-W. Lee and C.-K. Kang
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Target strengths of krill at 136 and 20 kHz
krill TS carried out by AtlantNIRO from 1980 to 1985. We feel that these may be useful in general ... . The number of these containers corresponded to the number of experiments to be carried out for each ... density of krill biomass can be calculated for the trawl swept volume. The trawl operating area (swept ... gives the results of representative hauls for which: • trawl catchability (P) was able to be ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 141–157 : Автор(ы): Kasatkina, S.M.
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Age-structured production model for toothfish at South Georgia
Abstract: The ASPM model used by Agnew and Kirkwood (2004, WG-FSA-04/82) has been modified ... selectivity parameters allowed to be estimated on an annual basis the fits are substantially improved. However ... , by allowing all parameters to be estimated in this way the model is over-parameterised and regularly ...
Meeting Document : WG-FSA-SAM-05/18 : Автор(ы): A. Payne, G.P. Kirkwood, R. Hillary and D.J. Agnew (United Kingdom)
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e-sc-xx-a5-appD.pdf
... be derived from fine-scale catch and effort data; the fine-scale data are a subset of the STATLANT ... 48.3 in 1982/83. 3.3 Records of fishing for C. gunnari in Area 58 are available dating back to the ... 1979/80 and 1987/88 (Table 1) are believed to have been taken in Division 58.5.1. Australia declared ... 58.5.2 share many characteristics. These fisheries may be characterised by: • large fluctuations in application/pdf attached to:WAMI-01
Meeting Report : WAMI-01
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