Результаты поиска

1. Quantifying habitat use in satellite-tracked pelagic seabirds: application of kernel estimation to albatross locations

   Abstract:  We develop a new approach to quantifying habitat use within the foraging ranges of ... from black-browed and grey-headed albatrosses Diomedea melanophris and D. chrysostoma during the chick ... -rearing period of the breeding cycle at South Georgia. At this time the activity range of these two ... contrast, kernel estimation reveals that the main foraging areas of these two sympatric, congeneric species ...

   Meeting Document : WG-EMM-01/67 : Автор(ы): A.G. Wood (United Kingdom), B. Naef-Daenzer (Switzerland), P.A. Prince and J.P. Croxall (United Kingdom)

2. Krill processing factors

   Abstract:  There is a wealth of earlier papers on the topic of krill processing dominated by the ... works of Grantham (1977) “The Utilization of Krill”, Budzinski et al (1985), “The Possibilities of ... (1980-82). Within these papers are the fundamentals of product yields and the framework for determining ... production has some time of uncertainty ahead due to a shake out of the industry, with departure of older ...

   Meeting Document : WG-EMM-01/44 : Автор(ы): D. Rogers (USA)

3. Southern royal albatross Diomedea epomophora census on Campbell Island, 4 January–6 February 1996, and a review of population figures

   the period 4 January to 6 February 1996 of the 1995-96 breeding season. A total of 7787 occupied nests ... was counted. Comparisons of different field census techniques and a measure of the rate of egg loss ... suggest that 8200-8600 pairs were nesting in the 1995-96 breeding season. The count WDS 23% higher than in ... thoroughly. Interpretation of population trend data from previous censuses Is difficult because of the likely ...

   Meeting Document : SC-CAMLR-XVII/BG/13 : Автор(ы): Delegation of New Zealand

4. Acoustic estimates of krill abundance at South Georgia, 1981–1998

   Abstract:  Acoustic estimates of abundance of the Antarctic krill, Euphausia superba, at South ... a primary objective, and estimates derived for the first time here from acoustic data collected as a ... subsidiary during other studies of the pelagic ecosystem at South Georgia. Krill abundance at the island ... fluctuated widely from year to year over this time, ranging from?2 to? 150 gm-2 (wet weight). The 1982, 1991 ...

   Meeting Document : WS-AREA 48-98/9 : Автор(ы): A.S. Brierley, J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson (UK)

5. Geographic aspects of Euphausia superba resources exploitation

   adjacent waters (subregions outside of the Scotia Sea are under pecular attention) are observed ... . Concentration of E.superba of the same order of biomass volume as in the Scotia Sea were observed at several ... subregions along the peripherie of Weddell Gyre and also nearshore of Antarctide. Offshore concentrations of ... areas should include the preliminar getting of knowledges on changeability of E.superba aggregation ...

   Meeting Document : WG-KRILL-93/04 : Автор(ы): R.R. Makarov (Russia)

6. Status of krill target strength

   Abstract:  Empirical estimates for the target strength of krill are extracted from the literature ... cause of bias in single-animal measurements, namely thresholding. Theoretical estimates for the target ... strength are derived from the deformed-cylinder scattering model assuming specific sets of physical and ... orientational parameters, for which there is an empirical basis. The theoretical estimates show a non-monotonic ...

   Meeting Document : WG-KRILL-92/11 : Автор(ы): K.G. Foote (Norway), D. Chu and T.K. Stanton (USA)

7. Geographic aspects of Euphausia superba resources exploitation

   adjacent waters (subregions outside of the Scotia Sea are under pecular attention) are observed ... ° Concentration of E.superba of the same order of biomass volume as in the Scotia Sea were observed at several ... subregions along the peripherie of Weddell Gyre and also nearshore of Antarctide. Offshore concentrations of ... areas should include the preliminar getting of knowledges on changeability of E.superba aggregation ...

   Meeting Document : WG-CEMP-92/31 : Автор(ы): R.R. Makarov (Russian Federation)

8. Dietary studies of Adélie penguins through faecal DNA analysis

   Abstract:  The composition of penguin diet is currently monitored through the A8 CEMP Chick Diet ... monitoring parameter. The current Standard Method involves stomach lavage to collect the stomach contents of ... adult birds and sorting the samples to identify prey composition and mass. At WG-EMM-12 it was noted ... , procedures were under consideration. Here we discuss results from recent work using the extraction of prey ...

   Meeting Document : WG-EMM-17/13 : Автор(ы): L. Emmerson, B. Deagle, C. Waluda, M. Dunn, P. Trathan and C. Southwell

9. Competition-induced starvation drives large-scale population cycles in Antarctic krill

   Abstract:  Antarctic krill (Euphausia superba)—one of the most abundant animal species on Earth ... . Previous studies have postulated that the krill cycle is induced by periodic climatological factors, but ... , we identify intraspecific competition for food as the main driver of the krill cycle, while external ... that the cycle amplitude increases with reduction of krill loss rates. Thus, a decline of apex ...

   Meeting Document : WG-EMM-18/P05 : Автор(ы): A.B. Ryabov, A.M. de Roos, B. Meyer, S. Kawaguchi and B. Blasius

10. 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 : Автор(ы): A. Takahashi (Japan), M.J. Dunn, P.N. Trathan (United Kingdom), K. Sato, Y. Naito (Japan), J.P. Croxall (United Kingdom)

Страницы