Résultats de la recherche

1. A spatially explicit population dynamics operating model for Antarctic toothfish in the habitable depths of the Ross Sea region

   to date. We propose that the modelling platform presented here can be used to test the likelihood and ... compare with previous models where the stock was either restricted to the fished cells only (65 cells ... the one that restricts toothfish distribution to depths which are known to provide suitable toothfish ... about the distribution of toothfish in areas where no fishing has occurred, such that the unrestricted ...

   Meeting Document : WG-FSA-13/53 : Auteur(s): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)

2. Estimates of the tag loss rates for single and double tagged toothfish (Dissostichus mawsoni) fishery in the Ross Sea

   plausible that there could be a catastrophic failure of tags or some other systematic change in the tag loss ... and subsequently recaptured fish suggested that the loss rate was about 3.5% (95% C.I.s 0.020–0.054 ... models suggested that there was evidence of immediate failure of tags (α = 0.035) and an ongoing constant ... applied in the assessment models of Dunn & Hanchet (2009a, 2009b), with the loss rates slightly over ...

   Meeting Document : WG-SAM-11/18 : Auteur(s): A. Dunn, M.H. Smith (New Zealand), D.J. Agnew (UK) and S. Mormede (New Zealand)

3. Analyses of acoustic line-transect data from the waters around South Georgia: estimation of krill (Euphausia superba Dana) biomass

   various definitions of strata. The total biomass in the area of 155 786 km2 was estimated to be 1.8225 x ... 106 t (Coefficient of Variation = 9.5%). This gives an estimate of mean density throughout the region ... of 11.7 t km-2. Although the estimate of the mean is not sensitive to the definition of strata, the ...

   Meeting Document : WG-KRILL-91/30 : Auteur(s): E. Murphy, I. Everson and A. Murray (United Kingdom)

4. IN SITU MEASUREMENTS OF TILT ANGLE DISTRIBUTION AND TARGET STRENGTH IN ANTARCTIC KRILL (EUPHAUSIA SUPERBA)

   data acquired. The post-processing and analyses are ongoing and the results from this work will be ... presented in future reports. Author(s):  G. Skaret, S.A. Iversen, T. Knutsen, R.J. Korneliussen, E. Ona, R ... . Pedersen, A. Totland, T. Torkelsen (Norway) and X. Zhao (China) Title:  IN SITU MEASUREMENTS OF TILT ANGLE ...

   Meeting Document : WG-EMM-08/29 : Auteur(s): G. Skaret, S.A. Iversen, T. Knutsen, R.J. Korneliussen, E. Ona, R. Pedersen, A. Totland, T. Torkelsen (Norway) and X. Zhao (China)

5. The Ross Sea toothfish fishery: proposal for conditional transition of classification from exploratory to established

   uncertainties with aspects of the stock, we propose that the stock is sufficiently well understood and assessed ... that it should be re-classified.  To ensure that sufficient data are acquired to continue assessment of ... ’ has led to the widespread misconception that little information is available for this stock, and that ... be undertaken.  In fact, many biological characteristics of D. mawsoni are now well understood, and ...

   Meeting Document : WG-FSA-11/32 : Auteur(s): C. Jones (USA) and S. Hanchet (New Zealand)

6. Rossii revisited: new information on the early history of the fishery for Notothenia rossii in Subarea 48.3

   unrealistic stock history considering that this stock was the first to be exploited in the Antarctic. A VPA ... gunnari, rather than N. rossii, and that 25% of the catch in 1969 was also C. gunnari. A VPA run with ... Abstract:  New catch data reported to CCAMLR indicate that Notothenia rossii was heavily exploited ... using the new data suggests that unexploited biomass was over 900 000 tonnes, and declined in a manner ...

   Meeting Document : WG-FSA-95/17 : Auteur(s): Agnew, D.J.

7. Trawl survey of the Patagonian toothfish (Dissostichus eleginoides) resource off the Prince Edward Islands

   around the Prince Edward Islands in April 2001. Due to the paucity of bathymetric data, it was not ... aid in the design of such surveys should they be deemed practical. The maximum operating depth for the ... be surveyed by bottom trawl. The small area above the 1 500m isobath is scattered over 28 hills and ...

   Meeting Document : WG-FSA-01/72 : Auteur(s): R.W. Leslie and B.P. Watkins (South Africa)

8. Habitat preferences of Adélie and chinstrap penguins during pre-moult

   pre-moult had low predictive power. This indicates that predictive models may be insufficient to ... variation in their current distribution. With this in mind, we used Platform Terminal Transmitter (PTT ... phase of the annual cycle. We show that Adélie penguins have an affinity to forage and moult on sea-ice ... , and that chinstraps remain over the shallower shelf waters during pre-moult, and return to the colony ...

   Meeting Document : WG-EMM-18/P12 : Auteur(s): V. Warwick-Evans, M. Santos and P.N. Trathan

9. Elaborating a representative system of marine protected areas in eastern Antarctica, south of 60°S

   feature of identifying the values, including utility, of the RSMPA will be to ensure that activities do ... conservation of marine biodiversity by 2012. A representative system of marine protected areas (RSMPA) will be ... one that (i) provides a spatial estate of the smallest area sufficient to satisfy the principles of ... , and (iii) can be modified as the state of knowledge improves. In addition, the utility of the RSMPA ...

   Meeting Document : WG-EMM-10/26 : Auteur(s): A.J. Constable, B. Raymond, S. Doust, D. Welsford and K. Martin-Smith (Australia)

10. Comparison of estimators of effective sample size for catch-at-age and catch-at-length data using simulated data from the Dirichlet-multinomial Distribution

    shown that care should be taken to avoid year-to-year model lack-of-fit due to systematic deviations in ... (D-M) distribution with marginal class probabilities generated using a simple age-structured model ... parameter. This last method generally gave the best estimator of an ESS that is appropriate for haul-level ... heterogeneity with another of the haul-level methods giving similar estimates. The year-level methods gave very ...

    Meeting Document : WG-SAM-07/7 : Auteur(s): S.G. Candy (Australia)

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