Résultats de la recherche

1. Foraging strategies of chinstrap penguins at Signy Island, Antarctica: importance of benthic feeding on Antarctic krill

   Abstract:  Chinstrap penguins Pygoscelis antarctica are one of the major consumers of Antarctic ... krill Euphausia superba in the Southern Ocean. To examine their foraging strategy, we studied foraging ... trips). The diving depths of our study birds were much deeper (to 179 m) than previous studies on this ... maximum depth, the typical characteristics of benthic dives. These benthic-type dives were more abundant ...

   Meeting Document : WG-EMM-03/37 : Auteur(s): A. Takahashi (Japan), M.J. Dunn, P.N. Trathan (United Kingdom), K. Sato, Y. Naito (Japan), J.P. Croxall (United Kingdom)

2. MULTIPLE INDICATORS SUGGEST A STRONG ECOSYSTEM ANOMALY AT SOUTH GEORGIA IN 2009

   Abstract:  The marine pelagic system around South Georgia is characterised by considerable inter ... local oceanographic and atmospheric conditions. Much of the observed variability in various fitness ... metrics for birds, seals and fish seems to be connected with the availability of Antarctic krill ... , Euphausia superba, which is a major prey species for many vertebrate populations at South Georgia. The ...

   Meeting Document : WG-EMM-09/23 : Auteur(s): S. Hill, M. Belchier, M. Collins, S. Fielding, E. Murphy, P. Trathan, H. Venables and C. Waluda (United Kingdom)

3. UPDATED PRELIMINARY RESULTS OF AN ECOLOGICAL RISK ASSESSMENT FOR SEABIRDS AND MARINE MAMMALS WITH RISK OF FISHERIES INTERACTIONS

   identify areas or species requiring additional management or monitoring. Our study indicated that the risk ... particularly strong overlap between fishing effort and species ranges. We tested the sensitivity of the ... adding a factor of population. We found the outcomes of the PSA analyses were robust to these effects ... . However, adult survival rates did influence the rankings, and were identified as a key parameter requiring ...

   Meeting Document : WG-FSA-08/51 : Auteur(s): S. Waugh, D. Filippi, N. Walker (New Zealand) and D.S. Kirby

4. An assessment of seabird interactions with longlining operations for Dissostichus eleginoides around South Georgia, March–May 1997

   interactions with seabirds, and the effectiveness of measures employed to mitigate seabird mortality. In this ... study 61 lines were laid during April and May, all set at night using the Spanish double-line method ... with extra weights on the line and all deck-lights extinguished. Data were recorded during hauling ... into the side of the vessel. Few birds were generally seen following the vessel during setting ...

   Meeting Document : WG-FSA-97/09 : Auteur(s): Ashford, J.R., Croxall, J.P.

5. Among-year variation in growth of Antarctic krill Euphausia superba based on length-frequency data

   Abstract:  Understanding the temporal variability in vital rates (e.g. growth and survivorship) of ... estimating growth from observed length-frequency samples by combining kernel density estimates of the length ... -frequency distribution and the von Bertalanffy growth function. Our approach is conceptually straightforward ... and easy to implement. We applied the methods to Antarctic krill Euphausia superba collected from the ...

   Meeting Document : WG-EMM-13/P01 : Auteur(s): A.O. Shelton, D. Kinzey, C. Reiss, S. Munch, G. Watters and M. Mangel (USA)

6. Progress towards a representative network of Southern Ocean protected areas

   actions towards improved conservation and management. Several international targets have recommended the ... international waters has proven to be challenging in most of the world, national governments and the Commission ... for the Conservation of Marine Living Resources (CCAMLR) have succeeded in adopting multiple MPAs in ... the Southern Ocean. But are these MPAs representative of Southern Ocean biodiversity and ecosystems ...

   Meeting Document : WS-SM-18/12 Rev. 1 : Auteur(s): C. Brooks, S. Chown, L. Douglass and B. Raymond

7. Results of acoustic assessment of krill biomass in Subarea 48.2 during summer 1996

   Abstract:  In the period from 24 February to 7 March 1996 in the cruise of RV "Atlantida" ... ' S- 60°30' S and 42 °00' W- 50°00 'w within Subarea 48.2. The study area of 19.200 ... sq.mi1es was located in the zone of two circulation systems of climatic scale interaction: Antarctic ... Circumpolar Current and Weddell Sea water circulation. Researches in the study area included a broad spectrum ...

   Meeting Document : WG-EMM-96/36 : Auteur(s): Sunkovich, V.I., Kasatkina, S.M., Abramov, V.M., Polischuk, M.I., Sushin, V.A., Shnar, V.N.

8. KRILLBASE: a multinational, circumpolar database of abundance of Antarctic krill and salps

   webs and biogeochemical cycles. Sustainably managing the fishery for Antarctic krill against a backdrop ... data have been collected on the abundance of the two taxa from net sampling surveys since 1926, but ... solitaries and species combined), with associated environmental information, metadata and documentation. The ... led to a series of papers since 2004 that illustrate some of its potential uses. The latest version ...

   Meeting Document : SC-CAMLR-XXXV/BG/24 Rev. 1 : Auteur(s): A. Atkinson, S. Hill, H. Peat, R. Downie and L. Gerrish

9. Marine debris, entanglements and hydrocarbon soiling at Bird Island and King Edward Point, South Georgia, Signy Island, South Orkneys and Goudier Island, Antarctic Peninsula 2018/19

   , at Signy Island, South Orkneys and at Goudier Island, Antarctic Peninsula for the period April 2018 ... hydrocarbon soiling at any site during the reporting period. Overall, the occurrence of beached marine debris ... was above the long-term mean at Bird Island during summer, around the mean level at Goudier Island and ... below the mean at Signy Island and Bird Island during winter. The incidence of marine mammal ...

   Meeting Document : SC-CAMLR-38/BG/28 : Auteur(s): Delegation of the United Kingdom

10. Implanted identification tags in penguins: implantation methods, tag reliability and long-term effects (draft version)

    identifying individual penguins by both manual and automated means. We have found the survival of tagged ... problems associated with the use of implanted devices. The transponder removed from one bird had developed ... a slimy biofilm harbouring potentially pathogenic organisms incorporated at the time of implantation ... . If such contamination is common it is possible that the long-term survivorship of tagged groups of ...

    Meeting Document : WG-EMM-Methods-96/08 : Auteur(s): Kerry, K., Clarke, J.

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