Résultats de la recherche

1. Status of krill target strength

   cause of bias in single-animal measurements, namely thresholding. Theoretical estimates for the target ... orientational parameters, for which there is an empirical basis. The theoretical estimates show a non-monotonic ... shortcomings. Some recent single-animal measurements of target strength for live euphausiids and euphausiid ... dependence of target strength on both animal size and transmit frequency, notwithstanding admitted ...

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

2. Spatial distribution and swarm characteristics of Antarctic krill around the South Shetland Islands

   markedly higher than the other two years. Meanwhile, much more swarms (1055) were detected in February 2018 ... 2013, March 2015, January 2016 and February 2018 around South Shetland Islands. The swarm ... as swarms in a patchy fashion and the mean krill densities in December 2013 and February 2018 were ... in March 2015 compared with those in December 2013, January 2016 and February 2018, although the ...

   Meeting Document : WG-EMM-18/42 : Auteur(s): X. Yu, X. Wang and X. Zhao

3. Competition-mediated prey availability drives Adélie penguin (Pygocelis adeliae) chick size, mass and condition at colonies of differing size in the southern Ross Sea

   interactions between them, is a key component in understanding the factors driving changes in animal ... populations.  Body size, mass and condition may be important determinants of an organism’s ability to survive ... important for naïve juveniles when they first become independent of their parents and must learn to forage ... for themselves.  Therefore, changes to adult foraging efficiency through intra-specific competition or ...

   Meeting Document : WG-EMM-13/31 : Auteur(s): A.L. Whitehead (Australia), P. O’B. Lyver (New Zealand), G. Ballard (USA), K. Barton, B.J. Karl (New Zealand), D.G. Ainley, K. Dugger, S. Jennings (USA), A. Lescroël (France) and P.R. Wilson (New Zealand)

4. Krill length frequency distribution in Subarea 48.3 in January–April 1988 in relation to sources of its origin

   considered in the frame of hypothesis of krill resources forming from two sources: Antarctic Circumpolar ... distance of about 30-60 miles, beyond boundary zone occurs larger krill with the mode of about 49 mm. Krill ... . Krill distribution well corresponds to the water flows mentioned. Further analyses revealed ... retained for certain time and have a possibility to grow longer. Difference in krill length in such spots ...

   Meeting Document : WG-EMM-03/40 : Auteur(s): F.F. Litvinov, V.N. Shnar, A.V. Zimin and V.V. Lidvanov (Russia)

5. Spatial and temporal distribution of krill Euphausia superba biomass in the Ross Sea (1989/90, 1994/95)

   scattered previously below ice. Biomass density of krill was calculated per each nautical mile. For ... 1994 the investigated area in 80-100% was covered by ice. The above mentioned superswarm was recorded ... scattered forms (as mentioned above) and when the environmental conditions are favorable the coherent forms ... survey (in the end of December and at beginning of January) in an area of 13000 nm2 a total biomass of ...

   Meeting Document : WG-EMM-97/53 : Auteur(s): Kalinowski, J., Azzali, M.

6. AFRICAN IUU CAPACITY BUILDING WORKSHOP AND EXPENDITURE FROM THE CDS FUND – REPORT TO CCAMLR-XXIX

   -05/B, paragraph B2(ix) on the progress of a proposal for expenditure from the CDS Fund to conduct an ... present gave encouragement for the improved deterrence of IUU for the longer term, and raised the prospect ... capacity-building event focusing on illegal, unreported and unregulated (IUU) fishing in the CCAMLR ... of holding similar regional events in future years. Background 2. At CCAMLR-XXVII the Commission ...

   Meeting Document : CCAMLR-XXIX/09 : Auteur(s): Delegations of Australia, South Africa, the United Kingdom and the CCAMLR Secretariat

7. Exploratory analysis of acoustic data from the Ross Sea

   . Two types of pelagic layers were present in most acoustic recordings: a dense shallow layer between 30 ... conducting acoustic surveys for toothfish and rattails in the Ross Sea. Acoustic data were collected using a ... could be compared with longline catches. Each ‘line’ recording was between 20 and 50 min long ... suitable for acoustic analysis. The other 16 files were rejected because data quality was too poor (11 ...

   Meeting Document : WG-FSA-SAM 03/9 : Auteur(s): R.L. O’Driscoll and G.J. Macaulay (New Zealand)

8. A survey of fish stocks in the Heard Island and McDonald Islands region in the 1999/2000 season and a comparison of the abundances of selected species with those obtained in previous surveys

   , varying by a factor of 2-3 between years, but C. gunnari abundance can vary by a factor of about 20 ... between years. This is the result of occasional strong year classes entering the fishery and dominating ... the population for about 2 years before disappearing, as has been documented in other locations ... Heard Island Plateau and Shell Bank. Abundances and length density plots of these species plus two ...

   Meeting Document : WG-FSA-00/40 : Auteur(s): R. Williams, A. Constable, T. Lamb and E. van Wijk (Australia)

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

   % less and stomach-content mass on return ashore 30% less in winter. We conclude that foraging activity ... were bimodal. Shallow dives (30 m; 55% of total number and 81% of dive time) averaged 74-105 m and 2.7 ... were followed by surface intervals two to three times dive duration. Deep dives showed clear diel ... patterns, averaging 10-20 m at dawn and dusk and 70-90 m at midday. These results are consistent with the ...

   Meeting Document : WG-CEMP-92/37 : Auteur(s): 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)

10. SUMMER SURVEY OF FUR SEALS AT PRINCE EDWARD ISLAND, SOUTHERN INDIAN OCEAN

    11.4% per year from 2001. With an estimated 810 pups, the Antarctic fur seal is still in the rapid ... intrinsic rate of natural increase has declined to –0.3% per year over the last seven years, compared to the ... gazella and Subantarctic fur seals A. tropicalis were determined at Prince Edward Island during 16–20 ... the entire south-west coast of Prince Edward Island. Of the two colonies of Antarctic fur seals, the ...

    Meeting Document : WG-EMM-10/P15 : Auteur(s): M.N. Bester, P.G. Ryan and J. Visagie

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