Résultats de la recherche

1. Distribution of phytoplankton in the mixed layer: implication of krill abundance

   Abstract:  The vertical trajectory of phytoplankton in the Antarctic ocean is modelled as a random ... walk with a diffusivity derived from a simple Ekman layer model and turbulence theory. The surface ... mixing layer is shallow, but diffusion is large enough to effect the vertical distribution of ... phytoplankton in the upper ocean. Author(s):  United States of America Title:  Distribution of phytoplankton in ...

   Meeting Document : SC-CAMLR-VII/BG/26 : Auteur(s): United States of America

2. Genetic analysis of Antarctic toothfish samples from the Southern Ocean to explore potential stock boundaries

   restriction enzyme digests of nine sub regions of the mitochondrial genome. Polymorphisms were found in four ... out of seven introns digested with the restriction enzymes, but there was no population ... differentiation among the three sea areas. While direct sequencing of cytochrome b (665 base pair) showed ... virtually no variation, sequences for ~600 bp of the left domain of the control region showed nucleotide ...

   Meeting Document : WG-FSA-04/32 : Auteur(s): P.J. Smith, S.M. McVeagh (New Zealand) and P.M. Gaffney (USA)

3. Notes for identifying the three macrourid species, M. holotrachys, M. whitsoni and M. carinatus in CCAMLR Subarea 48.3

   the identification of three macrourid species caught as bycatch in the fishery for Patagonian ... toothfish, Dissostichus eleginoides, in Sub-Area 48.3. Scaling under the snout was used to separate ... scaled). The relative positioning of the second dorsal fin and the anal fin can also be used to ... 5.2 whilst M.carinatus has a head ratio of greater than 5.2. There was some overlap in the ranges of ...

   Meeting Document : WG-FSA-02/29 : Auteur(s): S.A. Morley, M. Belchier, M.G. Purves, T. Mulvey and J. Dickson (United Kingdom)

4. CLIMATE CHANGE AND THE ANTARCTIC MARINE ENVIRONMENT: MANAGEMENT IMPLICATIONS

   Abstract:  This paper discusses some of the implications of climate change and how these concerns ... of work, it will be essential for them to try to determine the relative risks (uncertainty), impacts ... and timescales, of the various processes consequent on climate change. With current levels of ... this process, we consider that it will be important to focus on issues that reduce uncertainty by the ...

   Meeting Document : WG-EMM-09/24 : Auteur(s): P.N. Trathan and D. Agnew (United Kingdom)

5. PROPERTIES OF WATER DYNAMICS AND KRILL DISTRIBUTION IN THE SOUTH SANDWICH ISLANDS SUBAREA

   Abstract:  of mean krill density in Subarea 48.4 there are premises for formation of the zones ... with increased density. These zones are located within the near-shore shelf-based SSMU and associated ... with meanders and eddy favorable for krill concentration. Here, in the cold water of the Weddell Sea ... , the main part of biomass of Subarea 48.4, are concentrated. In January-February, 2000, almost 60% of ...

   Meeting Document : WG-EMM-09/44 Rev. 1 : Auteur(s): S.M. Kasatkina and V.N. Shnar (Russia)

6. METHODS FOR IMPLEMENTING CONSERVATION MEASURE 22-06: AN IMPACT ASSESSMENT FRAMEWORK FOR BOTTOM IMPACTING FISHING METHODS IN THE CCAMLR AREA

   Abstract:  This paper presents a framework to assess and quantify the likely cumulative impact on ... potential VMEs from bottom fishing activity. The approach has been designed to facilitate standardized ... impacting fishing methods. Details of the New Zealand preliminary assessment using this framework are ... available in document CCAMLR XXVII-26. This paper illustrates the utility of the standardized approach and ...

   Meeting Document : WG-FSA-08/53 : Auteur(s): B. Sharp, S. Parker and N. Smith (New Zealand)

7. OTOLITH CHEMISTRY INDICATES POPULATION STRUCTURING BY THE ANTARCTIC CIRCUMPOLAR CURRENT

   population structure through the advection of life stages of marine fish species. To test this, we compared ... the chemistry of otolith nuclei from Patagonian toothfish (Dissostichus eleginoides), presently ... managed as spatially discrete populations corresponding to fishery management areas along the Antarctic ... Circumpolar Current (ACC), which transports water eastward around the Southern Ocean. The chemistry of otolith ...

   Meeting Document : WG-FSA-08/P05 - Abstract : Auteur(s): J.R. Ashford, C.M. Jones, E.E. Hofmann, I. Everson, C.A. Moreno, G. Duhamel and R. Williams

8. A generalised model for evaluating yield and the long term status of fish stocks under conditions of uncertainty

   flexibility for assessing the influence of different patterns of growth, natural mortality, spawning and ... fishing on the estimates of yield per recruit. Also, it can be used to evaluate the performance of a stock ... under a specified catch regime. The model uses an adaptive Runge-Kutta procedure to evaluate stock ... each year by integrating a set of differential equations which incorporate functions that specify the ...

   Meeting Document : WG-FSA-95/41 : Auteur(s): de la Mare, W.K., Constable, A.J.

9. A bathymetric data framework for conservation in the Ross Sea region

   methods. We developed an algorithm to summarize bathymetric point data (x,y,z) for the Ross Sea region to ... especially important because of the multinational use of such data. The method is applicable to the entire ... Southern Ocean, but is currently applied only to the Ross Sea region. We have obtained publically available ... -specified bathymetric areas, calculating the areas of those polygons, and displaying them as contour maps ...

   Meeting Document : WG-SAM-10/18 : Auteur(s): S.J. Parker, B. Wood, S.M. Hanchet and A. Dunn (New Zealand)

10. Synopsis of data from satellite telemetry of foraging trips and migration routes of penguins and pinnipeds from the South Shetland Islands, 1997/98 to present

    Abstract:  We present a synopsis of the US AMLR satellite telemetry data, including both ARGOS and ... GPS positions estimates, to inform spatial planning efforts in the Antarctic Peninsula and Scotia Sea ... region. Identifying the patterns of habitat utilization by marine organisms is critical for proper ... spatial planning. Moreover, the timing and extent of habitat use by multiple species must be considered to ...

    Meeting Document : WG-EMM-12/37 : Auteur(s): J. Hinke, G. Watters, W. Trivelpiece and M. Goebel (USA)

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