Résultats de la recherche

1. A new bathymetric compilation for the South Orkney Islands, Antarctic Peninsula (49°–39°W to 64°–59°S): insights into the glacial development of the continental shelf

   Abstract:  We present a new, high resolution (300 m) bathymetric grid of the South Orkney Islands ... and surrounding continental shelf, northeast of the Antarctic Peninsula. The new grid, derived from a ... information for a range of scientific applications and end users including oceanographers, glacial modellers ... drained a former ice cap centred on the South Orkney Islands. During previous glacial periods, grounded ...

   Meeting Document : WG-EMM-14/P01 : Auteur(s): W.A. Dickens, A.G.C. Graham, J.A. Smith, J.A. Dowdeswell, R.D. Larter, C.-D. Hillenbrand, P.N. Trathan, J.E. Arndt and G. Kuhn

2. Results of a CCAMLR-sponsored research survey to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea, February 2012

   Abstract:  At its 2011 meeting, the Scientific Committee agreed that a time series of relative ... recruitments from a well-designed survey could be a useful input into the Ross Sea stock assessment model and ... endorsed a proposal to carry out this work once the fishery had closed at the end of the 2011/12 season ... . The survey had two main objectives: (i) To establish the feasibility of developing a time series of ...

   Meeting Document : WG-FSA-12/41 : Auteur(s): S.M. Hanchet, S. Mormede, S. Parker, A. Dunn (New Zealand) and H.-S. Jo (Republic of Korea)

3. A system-of-equations approach to modeling age structured fish populations: the case of Alaskan red king crab, Paralithodes camtschaticus

   Abstract:  This paper presents a simultaneous system-of-equations approach to modeling age ... -structured populations using trawl survey age/size frequency data. The analysis builds upon a Ricker spawner ... -recruit structure and provides a cohort-based estimation method that retains the underlying dynamic ... properties of a delay-difference model. The framework shares a common spawner-recruit function across age ...

   Meeting Document : WS-CRAB-93/23 : Auteur(s): J.A. Greenberg, S.C. Matulich and R.C. Mittelhammer (USA)

4. A two-fleet ASPM assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity

   Butterworth (2004) that permitted annual fluctuations about a deterministic stock-recruitment relationship is ... become available for the years 2004 and 2005. The assessment is also generalised to allow for a second ... fleet to accommodate data from a pot fishery that has been in operation since November 2004. Results ... obtained show a much greater selectivity for larger toothfish for the pot than for the longline fishery – a ...

   Meeting Document : WG-FSA-05/58 : Auteur(s): A. Brandão and D.S. Butterworth (South Africa)

5. A REVIEW OF THE METHODS USED TO RELEASE SKATES (RAJIIDS), WITH OR WITHOUT TAGS, IN ANTARCTIC EXPLORATORY FISHERIES

   the water) as an alternative to either retaining all aboard or discarding dead skates, as a skate ... . Subsequently a number of problems have become evident with this method. The Working Group on Fish Stock ... than being brought on board. The WG-FSA recommended that should the tag identification rate be low, a ... biological (and potentially other meristic data) from a sub-sample when possible, and release live skates in ...

   Meeting Document : WG-FSA-08/30 : Auteur(s): J.M. Fenaughty (New Zealand)

6. Preliminary assessment of Dissostichus eleginoides on the Heard Island Plateau (Division 58.5.2) based on a survey in April–May 2003

   Abstract:  A preliminary assessment of yield of Patagonian Toothfish, Dissostichus eleginoides ... result of a randomly stratified trawl survey completed between 16 April and 10 May 2003. The 2003 ... estimate of abundance of recruits indicates a continuation of a period relatively low recruitment since ... 1999. A minor revision to the recruitment series resulted in a relatively small reduction in the ...

   Meeting Document : WG-FSA-03/33 : Auteur(s): A.J. Constable, C.R. Davies, R. Williams and T. Lamb (Australia)

7. Temporal variation in Antarctic sea-ice: analysis of a long-term fast-ice record from the South Orkney Islands

   Abstract:  Detection of climate-induced change in marine ecosystems requires a knowledge of the ... underlying variability of the environment. This paper uses a range of datasets to investigate the interannual ... variability in Southern Ocean sea-ice dynamics. We present the first analysis of a series of fast-ice duration ... indicate that there has been a long term decline in the duration of sea-ice at the South Orkney Islands in ...

   Meeting Document : WG-EMM-95/80 : Auteur(s): Symon, C., Murphy, E.J., Priddle, J., Clarke, A.

8. Ideal survey patterns: an example of using a simulated world

   Abstract:  This paper considers a class of survey patterns for a toothfish long lining fishery ... . These survey patterns are characterised by a minimum mutual separation distance and a shot selection ... selected or that locations are selected at random. The landscape and fishery are simulated in a spatially ... interest about the fished population? If and when can the catch/effort data be used as a measure of the ...

   Meeting Document : WG-FSA-01/75 : Auteur(s): I.R. Ball and A.J. Constable (Australia)

9. Preliminary aspects of a simulation model to be used for evaluating the experimental crab fishery

   Antarctic crab fishery. A simulation model is proposed for conducting this work. Length frequency and catch ... fishery simulation is spatially explicit, and the dynamics of crab abundance are described on a daily ... basis. The simulation includes advective and diffusive movement rates, a lagged Beverton-Holt stock ... recruitment relationship, and a model for catch that contains a random normal deviate. Finally, an algorithm ...

   Meeting Document : WG-FSA-94/26 : Auteur(s): G. Watters (USA)

10. A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2009/10

    881H and 881I, with a reduced catch from 881K due to ice conditions. The catch limit in the north was ... 88.2E, but a slight decline in SSRU 882CDFG over the last two years. We carried out a more detailed ... characterisation of Patagonian toothfish catches for the first time. A total of 124 t of Patagonian toothfish has ... species identification be independently checked through examination of a subsample of otoliths from these ...

    Meeting Document : WG-FSA-10/23 : Auteur(s): S.M. Hanchet, M.L. Stevenson and A. Dunn (New Zealand)

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