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1. REVISION DES PRESCRIPTIONS TECHNIQUES ENCADRANT LA PECHE A LA LEGINE AFIN DE LIMITER LES PRISES ACCESSOIRES

   measures (paragraph 1 above) and some specific measures (paragraph 2 above). The relevant portions of these ...

   Meeting Document : SC-CAMLR-XXX/BG/10 : Auteur(s): Delegation of France

2. NET-BASED VERIFICATION OF ACOUSTIC TECHNIQUES USED TO IDENTIFY ANTARCTIC KRILL

   Sv120-38 and Sv200-120, (ii) ‘2 freq model’- using the SDWBA to set the acceptance window for just Sv120 ... -38, (iii) ‘2 freq 2-16’- where the Sv120-38 window was fixed at 2-16 dB and (iv) ‘2 freq 2-12’- where ... the Sv120-38 window was fixed at 2-12 dB. The overall aggregation dB difference for 120 – 38 kHz for ... model derived target id window only identified krill in 6 of the 16 nets correctly. The ‘2 freq 2-16 ...

   Meeting Document : WG-EMM-08/54 : Auteur(s): J. Watkins and S. Fielding (United Kingdom)

3. Biomass of Antarctic krill (Euphausia superba) off east Antarctica (30–80°E) in January–March 2006

   , integrated to 250 m depth across the survey area (1,566,157 km 2), was 10.15 g m-2. The total biomass was ... relatively weak aggregations (s A <100 m 2 nmi-2 for each 2 km-alongtrack integration interval), with 50 ... % of integration intervals containing backscattering values <10 m 2 nmi-2. Half of the biomass was ...

   Meeting Document : WG-EMM-06/16 : Auteur(s): T. Jarvis, E. van Wijk, N. Kelly, S. Kawaguchi and S. Nicol (Australia)

4. Risk maps for Antarctic krill under projected Southern Ocean acidification

   elevated seawater CO 2 levels and successful hatching is impaired at CO 2 levels greater than 1000 μatm ... . Exposure to elevated CO 2 during the first 3 days of embryonic development significantly retards subsequent ... development even if the embryos are transferred to seawater with current levels of CO 2. Krill embryos appear ... more vulnerable to ocean acidification than other pelagic crustaceans such as copepods. p CO 2 in the ...

   Meeting Document : WG-EMM-14/P06 : Auteur(s): S. Kawaguchi, A. Ishida, R. King, B. Raymond, N. Waller, A. Constable, S. Nicol, M. Wakit and A. Ishimatsu

5. Glider-based estimates of Antarctic krill in Bransfield Strait, and the West shelf off Livingston Island, Antarctica

   -December 2018 and mid-March 2019. We compare mean biomass density (g m-2) estimates derived from gliders to ... from 350 glider profiles was 25.0 g m-2, compared with the mean biomass density of 28 g m-2 collected ... estimated from two repeat glider surveys were 61.04 and 104.1 g m-2. Mean biomass density estimates from ... broad-scale surveys conducted by the U.S. AMLR Program were 55 and 43 g m-2, for January and February ...

   Meeting Document : WG-EMM-2019/13 : Auteur(s): C. Reiss, A. Cossio, G. Cutter, J. Walsh and G. Watters

6. Estimates of primary production by ice algae and phytoplankton in the coastal ice-covered area near Syowa Station, Antarctica

   -2 h-1 in June to 13.3 E m-2 h-1 in December. Relative light intensity estimated at the bottom of sea ... and ice. Maximum daily production of ice algae (34 mgC m-2 day-1) and phytoplankton (450 mgC m-2 day-1 ... and phytoplankton was 3.5 and 17 gC m-2, respectively. These results indicate that summer ...

   Meeting Document : WG-KRILL-93/28 : Auteur(s): H. Satoh, K. Watanabe and T. Hoshiai (Japan)

7. Modelling egg and larval transport of Antarctic toothfish (Dissostichus mawsoni) in the East Antarctic region: preliminary result using satellite data

   Abstract:  Using two different surface geostrophic filed data (A-1: without and A-2: with temporal ... 2-year simulation.  From the result of the BB region, while strong self retention on the BB was ... observed in the experiment A-1, the majority of particles were advected eastward in the experiment A-2. A ... experiment A-2 because of effects of temporal eddy activities. In the northern continental slope region, most ...

   Meeting Document : WG-FSA-2019/63 : Auteur(s): M. Mori, K. Mizobata, T. Okuda and T. Ichii

8. Seasonal variation in acoustic estimates of krill density at South Georgia during 2001/2002

   Antarctic Survey regularly since 1996. Krill density in November was low (5 g m-2), higher in both the two ... surveys in January (46g m-2 and 72 g m-2) and had decreased to 12 g m-2 by May. Our repeated surveys at ...

   Meeting Document : WG-EMM-02/39 : Auteur(s): C. Goss, S.A. Grant, N. Cunningham, J.L. Watkins, P.N. Trathan, E. Murphy and K. Reid (United Kingdom)

9. Net-based verification of acoustic techniques used to identify Antarctic krill

   ' using an SDWBA-derived range for Sv120-3, (iii) '2 freq 2-16'- with an Sv120-38 range ... of 2-16 dB and (iv) '2 freq 2-12'-with an Sv120-38 range of 2-12 dB The '3 freq model ... freq 2-16' algorithms correctly identified all the aggregations as krill. However, different krill ...

   Meeting Document : SG-ASAM-09/04 : Auteur(s): J. Watkins and S. Fielding (United Kingdom)

10. GROUNDFISH SURVEY IN CCAMLR SUB-AREA 48.3 IN APRIL 2008 WITH PRELIMINARY ASSESSMENT OF MACKEREL ICEFISH

    of 30,050. Catch-weighted length frequencies indicated that icefish population was dominated by 2 ... the 1+ fish produced yield of 3445 tonnes in Year 1 (2008/09) and 2318 tonnes in Year 2 (2009/10). In ... Scenario 2, in which the 1+ fish were excluded and biomass adjusted accordingly, yields were 3372 and 2248 ... tonnes in Years 1 & 2 respectively. The Patagonian toothfish population was dominated by the same ...

    Meeting Document : WG-FSA-08/28 : Auteur(s): M.A. Collins, R.E. Mitchell, C.E. Main, J. Lawson, J. Watts, J. Slakowski, L. Featherstone and O. Rzewuski (UK)

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