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1. 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 : Autor(es): K.G. Foote (Norway), D. Chu and T.K. Stanton (USA)

2. 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 : Autor(es): R.R. Makarov (Russian Federation)

3. 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 : Autor(es): L. Emmerson, B. Deagle, C. Waluda, M. Dunn, P. Trathan and C. Southwell

4. 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 : Autor(es): A.B. Ryabov, A.M. de Roos, B. Meyer, S. Kawaguchi and B. Blasius

5. 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 : Autor(es): A. Takahashi (Japan), M.J. Dunn, P.N. Trathan (United Kingdom), K. Sato, Y. Naito (Japan), J.P. Croxall (United Kingdom)

6. 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 : Autor(es): S. Hill, M. Belchier, M. Collins, S. Fielding, E. Murphy, P. Trathan, H. Venables and C. Waluda (United Kingdom)

7. 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 : Autor(es): S. Waugh, D. Filippi, N. Walker (New Zealand) and D.S. Kirby

8. 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 : Autor(es): A.O. Shelton, D. Kinzey, C. Reiss, S. Munch, G. Watters and M. Mangel (USA)

9. 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 : Autor(es): A. Atkinson, S. Hill, H. Peat, R. Downie and L. Gerrish

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

    site may also compromise survival in some individuals. These risk factors could limit the use of ... 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 ...

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

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