Search results
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Inter-annual variability in krill density at South Georgia: 1997–2012
resets ranged several orders of magnitude (0 to 10 000 gm-2) and its distribution was highly skewed with ... , mean density for the area) showed several years of moderate to high values (µ > 30 gm-2 ... ) interspersed with years (1999-2000, 2004, 2009-2010) of very low density (µ < 30 gm-2). Author(s): S ...
Meeting Document : WG-EMM-13/14 : Author(s): S. Fielding, J.L Watkins, P. Trathan, P. Enderlein, C. Waluda, C. Goss, G. Stowasser, G. Tarling and E. Murphy (United Kingdom)
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Net sample validation of acoustic techniques used to identify and size Antarctic krill
). Here we compare net and acoustic data from 2 cruises around South Georgia in 1996 in order to assess ... kHz (ΔMVBS = MVBSI20- MVBS3S; where ΔMVBS between 2 & 12 dB). Biomass values estimated from krill ... = 0.94 visual classification, r2 = 0.99). Krill size was predicted from scattering models using the 2 ...
Meeting Document : WG-EMM-97/46 : Author(s): Watkins, J.L., Brierley, A.S.
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Further development and progress towards evaluation of an Antarctic toothfish (Dissostichus mawsoni) stock model for the Ross Sea
(single-area). The second and third scenarios (2-area and 3-area respectively) split the Ross Sea into ... either two or three discrete areas, with migrations of fish between areas. The 2-area model appeared to ... data simulated from the 2-area model. All the multi-area models investigated here could do with ...
Meeting Document : WG-FSA-SAM-05/12 : Author(s): A. Dunn, D.J. Gilbert and S.M. Hanchet (New Zealand)
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Report of the Workshop for the International Coordinated Survey in conjunction with CCAMLR-2000 Survey
the highest and lowest surveys, biomass densities on three remaining surveys were 49.2 g m-2 (CV 19.5 ... %), 39.5 g m-2 (CV 15.2 %) and 43.0 g m-2 (CV 14.1 %) over a nine-week period. Maps of biomass density for ...
Meeting Document : WG-EMM-01/68 : Author(s): Delegations of Japan, Rep. of Korea, USA and Peru
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Interannual variability in Antarctic krill (Euphausia superba) density at South Georgia, Southern Ocean: 1997 – 2013
g m-2) and its distribution was highly skewed with many zero observations. Within each survey the ... , 2001-2003, 2005-2007) of high values (µ > 30 g m-2) interspersed with years (1999-2000, 2004, 2009 ... -2010) of low density (µ < 30 g m-2). This pattern showed three different periods, with fluctuations ... sea-surface temperature (August SST) from the preceding year. A quadratic regression (r 2 = 0.42, P< ...
Meeting Document : WG-EMM-14/P04 : Author(s): S. Fielding, J. Watkins, P. Trathan et al.
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Acoustic estimates of krill density at South Georgia, December/January 1998/99
krill density there. Densities (east = 11.1 g m-2, west = 12.0 g m-2) were towards the lower end of the ...
Meeting Document : WG-EMM-99/20 : Author(s): A.S. Brierley and C. Goss (United Kingdom)
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Variability and predictability of Antarctic krill swarm structure
revealed 2 principal swarm types, which differed in both their dimensions and packing-concentrations. Type ... ) whereas type 2 swarms were an order of magnitude larger and had packing concentrations up to 10 times ... and large and superswarms within the type 2 group. A minor group (swarm type 3) was also found ... . Larger (type 2) swarms were more commonly found during nighttime or when it was overcast during the day ...
Meeting Document : WG-EMM-10/P10 : Author(s): G.A.Tarling, T. Klevjer, S. Fielding, J. Watkins, A. Atkinson, E. Murphy, R. Korb, M. Whitehouse and R. Leaper
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CDS Implementation and Data Analysis
landings and exports and greatest quantity of exports (4 644 tonnes and 2 539 tonnes). For both years ... France landed the largest quantity of toothfish (4 461 tonnes and 2 986 tonnes). The largest quantity of ...
Meeting Document : CCAMLR-38/BG/10 Rev. 2 : Author(s): CCAMLR Secretariat
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Annex to WS-DmPH-18 report: Towards the development of a stock hypothesis for Antarctic toothfish (Dissostichus mawsoni) in Area 48
Abstract: Annex paper to the WS-DmpH-18 meeting report (part 2 of 2) Author(s): M. Söffker, A ...
Meeting Document : WG-SAM-18/33 Rev. 1 : Author(s): M. Söffker, A. Riley, M. Belchier, K. Teschke, H. Pehlke, S. Somhlaba, J. Graham, T. Namba, C.D. van der Lingen, T. Okuda, C. Darby, O.T. Albert, O.A. Bergstad, P. Brtnik, J. Caccavo, A. Capurro, C. Dorey, L. Ghigliotti, S. Hain, C. Jones, S. Kasatkina, M. La Mesa, D. Marichev, E. Molloy, C. Papetti, L. Pshenichnov, K. Reid, M.M. Santos and D. Welsford
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An evaluation of reduced target strength estimates reported for krill (Euphausia superba)
strength from the data and fall into three categories: 1) Errors in measurements and assumptions; 2 ... directivity effects as a result of items under category 1; an estimated 2-3 dB bias due to systematic errors ... under category 2; and an estimated 3-4 db error due to category 3. Thus there is reason to believe that ...
Meeting Document : WG-KRILL-90/13 : Author(s): M.C. Macaulay (USA)