Search results

1. Environmental response of upper trophic level predators reveals a system change in an Antarctic marine ecosystem

   Abstract:  In the Antarctic Peninsula region current, long-term changes in the physical environment have significant potential to affect populations of Antarctic krill Euphausia superba, a keystone foodweb species. To investigate this we analysed data on krill-eating predators from 1980-2000 at

   Meeting Document : WG-EMM-01/21 : Author(s): K. Reid and J.P. Croxall (United Kingdom)

2. Are penguins and seals in competition for Antarctic krill at South Georgia?

   Abstract:  The Antarctic fur seal and macaroni penguin are sympatric top predators that occur in the Southern Ocean around South Georgia where they are, respectively, the main mammal and bird consumers of Antarctic krill. In recent years the population of fur seals has increased whereas that of

   Meeting Document : WG-EMM-01/22 : Author(s): K.E. Barlow, I.L. Boyd, J.P. Croxall, I.J. Staniland, K. Reid and A.S. Brierley (United Kingdom)

3. Adélie penguin population change in the pacific sector of Antarctica: relation to sea-ice extent and the Antarctic Circumpolar Current

   Abstract:  One of the longest continuing data sets involving a marine organism in the Antarctic is that of annual estimates of breeding population size of Adélie penguins Pygoscelis adeliae at colonies on Ross Island, Ross Sea, 1959 to 1997. The sizes of these colonies have displayed significant

   Meeting Document : WG-EMM-01/23 : Author(s): P.R. Wilson (New Zealand), D.G. Ainley, N. Nur, S.S. Jacobs (USA), K.J. Barton (New Zealand), G. Ballard and J.C. Comiso (USA)

4. Outline details of the proposed aerial photographic survey at South Georgia for estimating breeding population sizes of land-based predators

   Abstract:  This paper describes current research plans to estimate the size of land-based marine predator populations breeding at South Georgia with a view to providing critical data about interactions with commercial fisheries. The research will also develop methodologies that reliably assess

   Meeting Document : WG-EMM-01/24 : Author(s): P. Trathan and D. Briggs (United Kingdom)

5. Adélie penguin population change in the pacific sector of Antarctica: relation to sea-ice extent and the Antarctic Circumpolar Current

   Author(s):  P.R. Wilson (New Zealand), D.G. Ainley, N. Nur, S.S. Jacobs (USA), K.J. Barton (New Zealand), G. Ballard and J.C. Comiso (USA) Title:  Adélie penguin population change in the pacific sector of Antarctica: relation to sea-ice extent and the Antarctic Circumpolar Current Approval: 

   Meeting Document : WG-EMM-01/23 Proforma : Author(s): P.R. Wilson (New Zealand), D.G. Ainley, N. Nur, S.S. Jacobs (USA), K.J. Barton (New Zealand), G. Ballard and J.C. Comiso (USA)

6. Monitoring a marine ecosystem using responses of upper trophic level predators

   Abstract:  1. This study examined the changing status of the marine ecosystem at the island of South Georgia (Southern Ocean) using up to 27 variables measured over 22 years from 3 upper trophic level predators that specialise in foraging upon krill (Eupuasia superba Dana). These variables included

   Meeting Document : WG-EMM-01/25 : Author(s): I.L. Boyd and A.W.A. Murray (United Kingdom)

7. Spatial distribution of foraging by female Antarctic fur seals

   Abstract:  The study tested the hypothesis that the distribution of critical habitat for foraging by female Antarctic fur seals breeding at the island of South Georgia was influenced by physical gradients in the oceans and also by the need to avoid local competition for food. It also tested the

   Meeting Document : WG-EMM-01/26 : Author(s): I.L. Boyd, I.J. Staniland and A.R. Martin (United Kingdom)

8. Integrated environment–prey–predator interactions off South Georgia: implications for management of fisheries

   Abstract:  The oceanography of the South Georgia region is principally that of the Southern Ocean rather than the South Atlantic. A combination of factors, including advection, local bathymetry and high local productivity, leads to relatively large concentrations of krill (Euphausia superba) in the

   Meeting Document : WG-EMM-01/27 : Author(s): I.L. Boyd (United Kingdom)

9. Variability of krill biomass estimates in repeated mesoscale surveys in relation to CCAMLR-2000 Survey

   Abstract:  One of the important problems in interpreting CCAMLR-2000 results is how they reflect the krill biomass status, is it high, medium or low at the present time. The comparative analysis of krill biomasses derived from trawl catches was carried out; retrospective data of three Soviet

   Meeting Document : WG-EMM-01/28 : Author(s): V.A. Sushin, F.F. Litvinov (Russia) and V. Siegel (Germany)

10. Alternative methods for determining subarea or local area catch limits for krill in Statistical Area 48

    Abstract:  CCAMLR Conservation Measure 32/X sets a 1.5 million metric ton precautionary catch limit on krill (Euphausia superba) in Statistical Area 48. The measure also implies the application in future of precautionary limits could be applied to subareas or local areas. Nine alternative methods

    Meeting Document : WG-EMM-01/29 : Author(s): G. Watters and R. Hewitt (USA)

Pages