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1. INTERACTIONS OF PATAGONIAN TOOTHFISH FISHERIES WITH KILLER AND SPERM WHALES IN CROZET EXCLUSIVE ECONOMIC ZONE: AN ASSESSMENT OF DEPREDATION LEVELS AND INSIGHTS ON POSSIBLE MITIGATION SOLUTIONS

   year period we estimated a total loss of 1200 tons of Patagonian toothfish due to depredation which ... represents a financial loss of approximately 10 millions €. Killer whales were found to be responsible for ... the largest part of this loss (70%) while sperm whales had a lower impact (30%). Photo-identification ... longline fishery is exposed to high levels of depredation by killer and sperm whales. In this context, this ...

   Meeting Document : WG-IMAF-09/12 : Автор(ы): P. Tixier, N. Gasco, G. Duhamel and C. Guinet (France)

2. THE SELECTION OF TRIPS BASED ON DATA METRICS FOR THE ASSESSMENT OF ANTARCTIC TOOTHFISH IN THE ROSS SEA

   Abstract:  A dataset for the 2009 assessment of Antarctic toothfish (Dissostichus mawsoni) in the ... Ross Sea Region was selected on the basis of data quality metrics for individual trips. Initial ... informative datasets were selected comprising trips with high (above median) rates of recovery of previously ... released tags, and/or where tags released on the trip were subsequently recaptured at a high rate. These ...

   Meeting Document : WG-FSA-09/35 : Автор(ы): D.A.J. Middleton (New Zealand)

3. Estimation of the biomass of krill in Prydz Bay during January/February 1991, February/March 1992 and January/ February 1993 using echo integration

   the middle of the range of densities estimated from seven surveys between 1981 and 1985 (Higginbottom ... Abstract:  Hydroacoustic surveys of the abundance of krill (Euphausia superba) in the Prydz Bay ... surveys indicated some association of krill with the shelf break in the western part of the survey area ... and the centre of the Prydz Bay region but also found that the shelf break was in general not a region ...

   Meeting Document : WG-Krill-94/21 : Автор(ы): T. Pauly and I. Higginbottom (Australia)

4. Biotopic and spatial distribution of krill Euphausia superba Dana (Crustacea, Euphausiacea) length groupings in the Atlantic sector of Antarctic in summer 1984 and 1988

   southern branch of the Antarctic Circumpolar Current (ACC). The middle-length grouping and the small-length ... Abstract:  Three basic length groupings of krill were identified with the clustering analysis on ... the basis of the data of two complex surveys carried out in the western Atlantic sector of Antarctic ... in summer 1984 and 1988. The large-length grouping is biotopically associated with the waters of the ...

   Meeting Document : WG-EMM-04/27 : Автор(ы): V.V. Lidvanov, A.V. Zimin, K.E. Shulgovsky (Russia)

5. Estimation of the biomass of krill in Prydz Bay during January/February 1991 and February/March 1992 using echo integration

   SIBEX-II estimate falls in the middle of the range of densities estimated from seven reported surveys ... Abstract:  Hydroacoustic surveys of the abundance of krill (Euphausia superba) in the Prydz Bay ... association of krill with the shelf break in the western part of the survey area but also found that the shelf ... break was in general not a region of relatively high krill abundance. The mean surface density of krill ...

   Meeting Document : WG-KRILL-92/23 : Автор(ы): I. Higginbottom and T. Pauly (Australia)

6. How trophic dynamics of adult Antarctic krill Euphausia superba responses to the condition of no ice in the water during the winter: a case study at South Georgia?

   overwintering of krill in the Southern Ocean. The information on trophic variation of krill under ice-free ... waters during the winter can also provide the insight for understanding the response of krill to global ... diet of adult krill with size and month during the winter season (June to September 2016) at the South ... N values between sexes of krill. Nitrogen isotope signatures suggested increasing carnivory with ...

   Meeting Document : WG-EMM-2019/P04 : Автор(ы): G.P. Zhu, H.T. Zhang, B. Deng and Q.Y. Yang

7. Characteristics of seasonal variation in diurnal vertical migration and aggregation of Antarctic krill (Euphausia superba) in the Scotia Sea, using the Japanese fishery data

   Abstract:  We examined seasonal variation in CPUE (catch per volume of trawled water) and diurnal ... vertical migration of Antarctic krill (Euphausia superba) associated with the brightness categories of the ... day based upon the angles between the center of the sun and the celestial horizon on the Scotia Sea ... twilight and shallowest around at evening twilight. The range of trawling depth was narrower in the certain ...

   Meeting Document : WG-EMM-04/44 : Автор(ы): K. Taki, T. Hayashi and M. Naganobu (Japan)

8. Preliminary results of RV Dmitriy Stefanov researches in the Antarctic area of the Atlantic Ocean in April 1992

   polygon of 30 x 30 miles in the fishing area northwestward of Coronation Island in 18-22 April,1992. The ... krill biomass was estimated in the beginning and at the end of surveys. It amounted to 56.1 and 61.2 ... thous. t respectively. During the rest of the period the hydroacoustic assessment of krill aggregation ... of perimeter. The midwater trawl hauls were made periodically. The average estimates of krill ...

   Meeting Document : WG-CEMP-92/33 : Автор(ы): L.G. Maklygin, V.N. Shnar, A.V. Remeslo, A.P. Malyshko, I.A. Trunov, I.A. Barabanov, V.P. Shopov (Russian Federation) and A.G. Shepelev (Ukraine)

9. Models of tag shedding for double tagging as a function of time at liberty and approximate solutions for the single tagging model in CASAL

   ) and Hillary et al. (2006) to apply the square of the individual tag loss annual rate in CASAL over ... Abstract:  The model of tag shedding implicit in CASAL is that of Kirkwood and Walker (KW) (1984 ... ) which models the annual tag shedding (i.e. loss) rate as a constant for individual tags. The CASAL ... present to correctly apply the KW model for fish released with two tags. The solution of Dunn et al. (2005 ...

   Meeting Document : WG-SAM-11/12 : Автор(ы): S.G. Candy (Australia)

10. Precautionary spatial protection to facilitate the scientific study of habitats and communities under ice shelves in the context of recent, rapid, regional climate change

    will lead to the loss of existing marine habitats and the creation of new habitats. In general, fauna ... nutrient input, there may be consequent loss of some species or communities. Colonisation of new habitats ... the Antarctic Peninsula region. One of the most evident signs of climate change has been ice shelf ... collapse; overall, 87% of the Peninsula’s glaciers have retreated in recent decades. Ice shelf collapse ...

    Meeting Document : WG-EMM-12/34 : Автор(ы): P.N Trathan, S.M. Grant (United Kingdom), V. Siegel and K.-H. Kock (Germany)

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