Результаты поиска

1. Diving pattern and performance in nonbreeding gentoo penguins (Pygoscelis papua) during winter

   in Gentoo Penguins is changed by varying the frequency and duration of foraging trips, rather than by ... organization during the foraging trip) in relation to diet in nonbreeding Gentoo Penguins (Pygoscelis papua ... diurnal with 98% of foraging trips completed during the same day. Foraging-trip frequency was 0.8/day ... , trip duration was 6-8 h, and birds spent 51-62% of the foraging trip diving. Dive depth and duration ...

   Meeting Document : WG-CEMP-92/37 : Автор(ы): T.D. Williams (United Kingdom), A. Kato (Japan), J.P. Croxall (United Kingdom), Y. Naito (Japan), D.R. Briggs, S. Rodwell and T.R. Barton (United Kingdom)

2. Chinstrap penguins alter foraging and diving behaviour in response to krill size

   changes in prey availability. Chinstrap penguins are dependent predators of Antarctic krill in the Scotia ... Sea region. Both the sizes of krill found in penguin diets and acoustic estimates of krill biomass ... have fluctuated in recent years. We therefore examined the diet of chinstrap penguins at Livingston ... fish, mean nighttime dive depths, and the proportion of foraging trips occurring overnight. Based on ...

   Meeting Document : WG-EMM-07/11 : Автор(ы): A.K. Miller and W.Z. Trivelpiece (USA)

3. Herpes virus antibodies in Arctocephalus gazella from Cape Shirreff, Livingston Island, Antarctica

   utility of the extra vascular fluid for serological research in this matter is suggested. It is also ... bovine herpesvirus-1 (BHV-1) strain. Antibodies against BHV-1 were detected in four (7.4%) samples. The ... with the knowledge confirming the extended distribution range of herpesvirus, affecting a large number ... of hosts including A. gazella. It is strongly trusted the necessary to develop the scientific ...

   Meeting Document : WG-EMM-01/59 : Автор(ы): O. Blank, J.M. Montt, M. Celedón and D. Torres (Chile)

4. Proposal for a krill biomass survey for krill monitoring and management in CCAMLR Division 58.4.2-East

   further monitor seasonal dynamics of krill in the seasonally ice covered area. The survey is also designed ... to improve our understanding on the connectivity of the krill population, and overlap between krill ... and predators. A deeper understanding of all these factors will support the design of a tractable and ... sustainable long-term monitoring plan and spatial management (small-scale management unit) of the krill ...

   Meeting Document : WG-EMM-2019/03 : Автор(ы): S. Kawaguchi, M. Cox, N. Kelly, L. Emmerson and D. Welsford

5. Are tagging targets set in appropriate terms?

   is set in terms of the number of fish tagged per mass of fish caught thereby mixing “units” of ... that defining the target in terms of a percentage of the number caught may be more appropriate. Author ... Abstract:  Currently the target tagging rate to be achieved by vessels fishing in the CCAMLR area ... measure. This note questions whether it is appropriate to set the tagging targets these terms and suggests ...

   Meeting Document : WG-SAM-12/25 : Автор(ы): R.W. Leslie and C. Heinecken (South Africa)

6. Krill consumption by Adélie penguins in CCAMLR Divisions 58.4.1 and 58.4.2

   Abstract:  We estimate the total abundance of Adélie penguins foraging in Divisions 58.4.1 and ... 58.4.2 and provide preliminary estimates of krill consumed by breeding Adélie penguins in these Divisions ... breeding population than was evident from previous work. The population of breeding Adélie penguins was ... ) to March (end of moult)). We are currently extending the prey consumption model to estimate the ...

   Meeting Document : WG-EMM-16/65 : Автор(ы): C. Southwell and L. Emmerson

7. 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 ... —exhibits a five to six year population cycle, with oscillations in biomass exceeding one order of magnitude ... , 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

8. Uncertainty in green weight estimates from Norwegian krill fishing vessels

   an issue raised repeatedly within CCAMLR for a number of years, resulting in a modification to the C1 ... are carried out in practice and transferred to the C1 forms. We also present a brief evaluation of ... form implemented for the fleet in 2012. There are at present three Norwegian vessels operating in the ... krill fishery for Euphausia superba in the Antarctic. These vessels have in recent years contributed to ...

   Meeting Document : WG-EMM-13/41 : Автор(ы): G. Skaret and T. Knutsen (Norway)

9. Approaches to monitoring and assessing toothfish in new and exploratory fisheries, with particular reference to Subarea 88.1

   would be imprudent to rely solely on any one of these methods at the present time. We recommend that tag ... recapture experiments, or trawl surveys, be used in conjunction with experimental manipulation of effort to ... monitor toothfish – and perhaps as importantly – the wider ecosystem effects of the toothfish fisheries ... effort manipulation approach in all New and Exploratory fisheries, and in particular the current active ...

   Meeting Document : WG-FSA-SAM-04/08 : Автор(ы): ODriscoll, R.L., Hanchet, S.M.

10. Beach litter accumulation and retention at sub-Antarctic Marion Island: trends in relation to longline fishing activity

    1998 are reported, and compared to surveys done in 1984 and 1995, prior to the onset of unregulated ... while fishing equipment also doubled during this period. An increase in the number and proportion of ... illegal fishing in this area. An exponential increase in the litter accumulation was noted in annual ... Spanish script items was noted, while French items only appeared after the onset of illegal fishing ...

    Meeting Document : CCAMLR-XVII/BG/25 : Автор(ы): Delegation of South Africa

Страницы