Résultats de la recherche
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Modelling egg and larval transport of Antarctic toothfish (Dissostichus mawsoni) in the East Antarctic region: preliminary result using satellite data
eddy activity) covering 2011-2018, we developed the particle tracking model to investigate egg and ... larval transport of the Antarctic Toothfish in the East Antarctic region. This paper presents the ... 2-year simulation. From the result of the BB region, while strong self retention on the BB was ... observed in the experiment A-1, the majority of particles were advected eastward in the experiment A-2. A ...
Meeting Document : WG-FSA-2019/63 : Auteur(s): M. Mori, K. Mizobata, T. Okuda and T. Ichii
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ASSESSMENT OF SPATIAL-TEMPORAL DYNAMICS OF STANDARDIZED CPUE FOR KRILL FISHERY IN THE AREA 48
Abstract: The spatial-temporal dynamics of standardized abundance indices of krill in Area 48 ... based on the CCAMLR catch statistics was analyzed using GLMM with Tweedie’s distribution.In the ... yesteryear the authors revealed “diagnostics specificity” of GLMM tuning for CPUE standardization: many hauls ... to be interpreted as “outliers”, i.e. the hauls where residuals significantly deviated from the ...
Meeting Document : WG-EMM-11/28 : Auteur(s): S.M. Kasatkina and P.S. Gasyukov (Russia)
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Comparison of estimators of effective sample size for catch-at-age and catch-at-length data using simulated data from the Dirichlet-multinomial Distribution
Abstract: The incorporation of “effective sample size” (ESS) in integrated assessments is an ... approximate but simple way of modelling the distribution of catch-at-age or catch-at-length frequencies using ... frequencies. The ESS applied within the definition of the negative log-likelihood contribution to the ... objective function in CASAL determines the implicit weight given to the commercial catch-at-age or catch-at ...
Meeting Document : WG-SAM-07/7 : Auteur(s): S.G. Candy (Australia)
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Preliminary assessment of the South Georgia ray populations
Abstract: We modelled the ray population at South Georgia using a surplus production model ... implemented in a Bayesian framework. Catch and CPUE data were reconstructed for the time series 1985 – 2006 ... from a variety of sources, and included the consideration that since 2004 the practice of cutting rays ... off lines at the water surface should have increased survivorship of discarded rays, although this ...
Meeting Document : WG-SAM-07/11 : Auteur(s): D.J. Agnew, R. Mitchell, T. Carruthers, J. Roberts, R. Hillary and J. Pearce (United Kingdom)
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in SSRU 882E including data from the 2005/06 season
Abstract: We provide an update of the Bayesian sex and age structured population stock assessment ... model for Antarctic toothfish (Dissostichus mawsoni) in the SSRU 88.2E, using revised catch, CPUE, catch ... -at-age and tag-recapture data from New Zealand and all vessels. The updated reference case resulted ... different assumption of the level of natural mortality (M=0.13 y-1), and the revised length-weight and ...
Meeting Document : WG-FSA-06/48 : Auteur(s): A. Dunn and S.M. Hanchet (New Zealand)
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Report on a random stratified trawl survey to estimate distribution and abundance of Dissostichus eleginoides and Champsocephalus gunnari conducted in the Heard Island region (Division 58.5.2), May–June 2006
Abstract: Random stratified trawl surveys (RSTSs) of the distribution and abundance of demersal ... fish species on the Heard Island plateau have been conducted annually since 1997. The survey conducted ... in May-June 2006 had two main aims: • to assess the abundance and size structure of juvenile and ... adult Dissostichus eleginoides on the shallow and deep parts of the Heard Island Plateau.] • to assess ...
Meeting Document : WG-FSA-06/42 Rev. 1 : Auteur(s): G.B. Nowara, R. Williams and T. Lamb (Australia)
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Pilot test of techniques to mitigate seabird interactions with catcher processor vessels in the Bering Sea pollock trawl fishery: final report
vessels operating the Bering Sea fishery for pollock (Theragra chalcogramma) and that are practical and ... the netsounde cable (3rd wire). Third wire mitigation techniques included pulling the third wire as ... close as possible to the water at the stern with a snatch block, paired streamer lines and various ... deterrents attached directly to the third wire (3rd wire scarers). Warp deterrents included a boom array or a ...
Meeting Document : WG-FSA-05/37 : Auteur(s): E.F. Melvin, K.S. Dietrich and T. Thomas (USA)
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ADDING CATCH AT AGE AND SURVEY DATA TO THE 48.3 TOOTHFISH CASAL ASSESSMENT
Abstract: The catch-at-age based CASAL model for toothfish in Subarea 48.3, which was presented ... in 2007, is developed and extended here to include survey data. Additional adjustments to the model ... suggested by WG-FSA-2007 are implemented. Fits to the survey length frequencies are good for recent surveys ... but in the past some cohorts have been missed by the survey. Fits to the survey CPUE are generally not ...
Meeting Document : WG-SAM-09/13 : Auteur(s): D.J. Agnew and M. Belchier (United Kingdom)
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REPORT ON ACTIVITIES OF THE SCIENTIFIC COMMITTEE ON ANTARCTIC RESEARCH (SCAR) 2007/08
Abstract: This paper reports on the various activities conducted by or involving SCAR that relate ... biennial business and delegates meetings, and the SCAR/IASC 2008 IPY Open Science Conference, as well as ... reports on progress with the Evolution and Biodiversity in the Antarctic (EBA) programme, SCAR-MarBIN, the ... Southern Ocean Continuous Plankton Recorder Survey and the Census of Antarctic Marine Life (CAML) project ...
Meeting Document : CCAMLR-XXVII/BG/42 : Auteur(s): SCAR Observer to CCAMLR (G. Hosie, Australia)
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THE NEED FOR TRADE MEASURES IN CCAMLR
Abstract: Last year the Commission considered a proposal for a Conservation Measure concerning ... the adoption of a trade measure that will promote compliance with CCAMLR’s agreed upon rules to bring ... sustainable fishing. The proposal received the support of all but one State. ASOC would like to support the ... adoption of this Conservation Measure by the Commission at its XXVII Meeting, and clarify why the adoption ...
Meeting Document : CCAMLR-XXVII/BG/28 : Auteur(s): Submitted by ASOC