Résultats de la recherche

1. Variations in the diet composition and feeding intensity of mackerel icefish (Champsocephalus gunnari) at South Georgia (Antarctic)

   January/February 1985, January/February 1991 and January 1992. Main prey items were krill (Euphausia ... Thysanoessa species. The proportion of krill and Themisto in the diet varied considerably between the three ... seasons, whereas the proportion of mysids in the diet remained fairly constant. Krill which has a high ... energy content appears to be the prefered diet. In years of krill shortage, such as in 1991, krill is ...

   Meeting Document : WG-FSA-93/24 : Auteur(s): K.-H. Kock and S. Wilhelms (Germany), I. Everson (United Kingdom) and J. Gröger (Germany)

2. Diet composition of Champsocephalus gunnari in Subarea 48.3, Dr Eduardo Holmberg survey, February/ March 1994

   in February/March 1994 was analyzed using the frequency of occurrence (%) method. Krill (Euphausia ... Georgia, in parallel with the virtual absence of mysids and Thysanoessa spp.. Krill was available for fish ... 1991 year of krill "shortage". Besides, the tentative analysis of part of the samples using ... the coefficient Q (%) showed a greater importance of T. gaudichaudii with respect to krill. It is ...

   Meeting Document : WG-FSA-94/27 : Auteur(s): E. Barrera-Oro, R. Casaux and A. Roux (Argentina)

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

   local productivity, leads to relatively large concentrations of krill (Euphausia superba) in the region ... approaches to management. The current system for managing krill harvests includes precautionary features that ... account for interannual variability in krill populations and the food requirements of natural predators ... . However, in future it may be possible to use information from the natural krill predators to set ...

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

4. Fishing and conservation in southern waters

   Abstract:  Fishing in the Southern Ocean commenced on finfish in 1969/70 and on krill in 1972/73 ... . The krill catch from the Southern Ocean has been 4.9 million tonnes to date. More than 90 % of this ... potential for direct competition between krill fisheries and krill-dependent predators. Potential impacts of ... krill and finfishing on the ecosystems of the Southern Ocean range from endangering recruitment due to ...

   Meeting Document : SC-CAMLR-XII/BG/11 : Auteur(s): Delegation of Germany

5. Important aspects of prey distribution for the formation of foraging areas of chinstrap penguins and Antarctic fur seals at Seal Island

   inshore are: 1) proximity to breeding colonies and 2) high krill (Euphausia superba) abundance, whereas ... those of foraging slope/offshore are: 3) less patchy krill distribution, 4) shallow krill distribution ... , 5) larger krill size and 6) occurrence of energy-rich bioluminescing myctophid fish at night ... , feeding success may not be necessarily associated with dense aggregation of krill, but with distribution ...

   Meeting Document : WG-EMM-97/28 : Auteur(s): Bengtson, J.L., Hiruki, L.M., Naganobu, M., Ichii, T., Meyer, W.R., Cameron, M.F., Boveng, P., Takao, T., Miura, A., Jansen, J.K., Kawaguchi, S., Hayashi, T.

6. Climate change and zooplankton dominance in the Antarctic marine ecosystem: implications for the food web

   major factor regulating recruitment and population size of Antarctic krill (Euphausia superba) and ... population dynamics of salps (Salpa thompsoni). Strong krill recruitment success there follows years of ... sea-ice. An order of magnitude decrease of krill population size, increased incidence of massive salp ... blooms, and decreased abundance of krill-dependent Adelie penguins (Pygoscelis adeliae) in the past 15 ...

   Meeting Document : WG-EMM-96/21 : Auteur(s): Siegel, V., Fraser, W., Trivelpiece, S., Holm-Hansen, O., Loeb, V., Hewitt, R., Trivelpiece, W.

7. Warming effects in the Western Antarctic Peninsula Ecosystem: the role of population dynamic models for explaining and predicting penguin trends

   complex links between climatic variables, primary productivity, krill and avian predators. There are ... several studies reporting statistical relationships between climate, krill and penguins population size ... influenced by the inter-annual variability in the sea-ice extent and krill biomass. In this paper we ... developed simple conceptual models for decipher the role of climate and krill fluctuations on the population ...

   Meeting Document : WG-EMM-12/18 : Auteur(s): M. Lima and S.A. Estay (Chile)

8. Interannual variation in the diet of the Antarctic prion Pachyptila desolata at South Georgia

   . Antarctic krill Euphausia superba was the dominant prey item in three years and was replaced by calanoid ... copepods, especially Rhincalanus gigas and Calanoides acutus, in two years of low krill abundance ... krill availability Antarctic Prions forage closer inshore, taking copepods by filtering surface water ... to maintain a comparable level of reproductive success, unlike most other krill feeding species which ...

   Meeting Document : WG-EMM-97/12 : Auteur(s): Croxall, J.P., Edwards, T.M., Reid, K.

9. Evaluating MPA scenarios in Planning Domain 1 using a dynamic food-web model

   results indicate that protecting regions where krill are anticipated to concentrate in the future could ... positively affect biomass accumulation of krill and some krill predators. Additionally, protecting areas ... proposed for protection might positively impact the biomass of krill and krill predators. Protection of ...

   Meeting Document : SC-CAMLR-XXXVII/BG/04 : Auteur(s): Delegation of the USA

10. USING ECOSYSTEM STRUCTURE TO IDENTIFY FINER-SCALE SSMUS FOR OCEANIC AREAS IN SUBAREAS 48.1 TO 48.3

    Abstract:  One of the main issues in the management of the krill fishery is finding a spatial ... subareas. The oceanic SSMUs are the location of 72% of the estimated krill biomass, 61% of the estimated ... consumption of krill by predators and 10% of the cumulative total fishery catch in the three subareas (48.1 to ... ecological and oceanographic studies, and from the concentration of krill catches in limited parts of the ...

    Meeting Document : WG-EMM-11/18 : Auteur(s): S.L. Hill and J. Silk (UK)

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