Résultats de la recherche
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Oxygen and carbon stable isotopes in otoliths record spatial isolation of Patagonian toothfish (Dissostichus eleginoides)
depletion of δ13C at South Georgia compared to the Patagonian Shelf were most likely linked to differences ... otoliths of oceanic fish can resolve water masses and geographic areas, promising a powerful multivariate ... side of a population boundary, and otolith δ18O and δ13C values were measured to see if they could ... distinguish South American-caught fish from those taken in the Antarctic. Values of δ18O and δ13C predicted ...
Meeting Document : WG-FSA-08/P03 : Auteur(s): J.R. Ashford and C.M. Jones
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Research plan for the 2015/16 exploratory longline fishery of Dissostichus spp. in Division 58.4.3a
Abstract: The current season (2014/15) is the final one of the first three-season research which ... by all effective vessels were analyzed for the improvement of stock assessment in the research blocks ... estimator was largely different from that using the CPUE method. Predicted numbers of tag recaptures from ... during 2013-14 seasons. Understanding of the resource structure through clarification of their life ...
Meeting Document : WG-SAM-15/03 : Auteur(s): Delegation of Japan
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An updated descriptive analysis of the Antarctic toothfish (Dissostichus mawsoni) tagging scheme in the Ross Sea for the years 1997/98 to 2004/05
Abstract: An updated descriptive analysis of the toothfish tagging programme carried out in ... . A total of 4903 Antarctic toothfish have been released and 89 recaptured, and 443 Patagonian ... toothfish released and 9 recaptured. For the last two years, when tagging has been part of the Conservation ... Measure, New Zealand vessels have tagged between 1.0 and 2.77 toothfish per tonne of catch. Tagging rates ...
Meeting Document : WG-FSA-05/34 : Auteur(s): A. Dunn, S.M. Hanchet and K. Maxwell (New Zealand)
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Foraging movements of the shy albatross Diomedea cauta breeding in Australia; implications for interactions with longline fisheries
cauta breeding at two sites of Tasmania, Australia (Albatross Island in western Bass Strait and Pedra ... Abstract: Satellite telemetry was used to identify the foraging zones of Shy Albatrosses Diomedca ... Branca to the south) to assess their level of interaction with longline fisheries. Adult birds from both ... Branca foraged between the colony and the southeastern edge of the continental shelf. The distances ...
Meeting Document : WG-FSA-97/52 : Auteur(s): Gales, R., Hedd, A., Brothers, N., Robertson, G.
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A descriptive analysis of the toothfish (Dissostichus spp.) tagging programme in the Ross Sea up to 2005/06
Abstract: A descriptive analysis of the toothfish tagging programme carried out in Subareas 88.1 ... for non- New Zealand vessels for the first time. However, tag data were only available for all of ... these vessels for 2005 and for about half of these vessels for 2004. A reported total of 8888 Antarctic ... 20% of the recaptures could not be matched to a release observation, mainly because of missing ...
Meeting Document : WG-FSA-SAM-06/09 : Auteur(s): A. Dunn and S.M. Hanchet (New Zealand)
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Foraging movements of the shy albatross Diomedea cauta breeding in Australia; implications for interactions with longline fisheries
Abstract: Satellite telemetry was used to identify the foraging zones of Shy Albatrosses Diomedea ... cauta breeding at two sites off Tasmania, Australia (Albatross Island in western Bass Strait and Pedra ... Branca to the south) to assess their level of interaction with longline fisheries. Adult birds from both ... Branca foraged between the colony and the southeastern edge of the continental shelf. The distances ...
Meeting Document : WG-FSA-98/33 : Auteur(s): N. Brothers, R. Gales, A. Hedd and G. Robertson (Australia)
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Using outputs from spatial population models of Antarctic toothfish in the Ross Sea region to investigate potential biases in the single population model
assessment in the CCAMLR region. We recommend the further development of this method at future meetings ... assumptions of the stock assessment for Antarctic toothfish in the Ross Sea region using spatially explicit ... operating models. The method allows investigation of potential biases and uncertainty in the assumptions of ... Population Model (SPM), to develop spatially explicit movement models of the Antarctic toothfish in the Ross ...
Meeting Document : WG-FSA-12/45 : Auteur(s): S. Mormede and A. Dunn (New Zealand)
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Winter distribution and condition of Antarctic krill in relation to sea-ice and water column production in the South Shetland Islands during Austral Winter 2013
Abstract: Acoustic and net sampling of Antarctic Krill and other euphausiids was conducted at 88 ... was expansive (north of 60 S around Elephant Island) and the sea ice concentration was mostly more ... than 50%. Observations of birds and mammals showed that many species were found in southwestern ... Bransfield Strait, associated with the high concentrations of krill, an area targeted by the krill fishery in ...
Meeting Document : WG-EMM-14/13 : Auteur(s): C.S. Reiss, J. Walsh, K. Dietrich and J.A. Santora (USA)
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A single-area stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in SSRU 88.2E for the 2004/05 season
-release and recapture data providing the most information on stock size, but with the catch-at-age data ... excluding preventing very low estimates of stock size. Monte-Carlo Markov Chain (MCMC) diagnostics suggested ... some evidence of non-convergence, particular in the declining right-hand limb of the fishing ... selectivity parameters. MCMC estimates of initial (equilibrium) spawning stock abundance (B0) were very ...
Meeting Document : WG-FSA-05/31 : Auteur(s): A. Dunn, D.J. Gilbert and S.M. Hanchet (New Zealand)
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Acoustic monitoring and evaluation of krill in the Antarctic ecosystem Bransfield Strait and around Elephant Island during ANTAR XXI and XXII, aboard RV Humboldt, Peru
Abstract: Monitoring and hydroacoustic assessment of the distribution and biomass of krill ... multifrequency 120 and 38 kHz, respectively. This system is calibrated according to the procedure of ICES. For ... ; ANTAR XXII: 16 stations). Results indicated that krill swarms during the day swarms were recorded at ... from the surface to 20 m deep. A wide distribution of krill in the study area, the highest densities ...
Meeting Document : WG-EMM-16/76 : Auteur(s): R. Cornejo, M. Flores and J. Zuzunaga