Résultats de la recherche

1. 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)

2. e-sc-xiii-a5-appD.pdf

   ... Shannon, Director of the Institute, welcomed participants. 2. A Preliminary Agenda, circulated prior ... . 2 SIBEX 1: Polarstern - area surrounding Elephant Island; October to November 1983. Professor ... . SIBEX 2: John Biscoe - Drake Passage and Bransfield Strait south to Anvers Island; January to ... values for the inflow boundaries V I = V m V m >0 b ∑ (2) where b is the number of application/pdf attached to:WS-FLUX-94

   Meeting Report : WS-FLUX-94

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. Joint Polish/American hydroacoustic survey of Elephant Island and the vicinity of King George Island, 1988

   survey results apply to 7 453 n miles 2 near Elephant Island and 2 894 n miles 2 in the Bransfield Strait ... . The full survey found (120 kHz data) 385k tonnes (in 7 787 n miles 2) in the Bransfield Strait and the ... area north of King George Island and 309k tonnes (in 8 836 n m 2) in the expanded area around Elephant ... Island and 2 894 n miles2 in the Bransfield Strait. The full survey found (120 kHz data) 385k tonnes ... 7 453 nm2 cerca de la isla Elefante y a 2 894 nm2 en el estrecho de Bransfield. La prospecci6n ... Island. ( 2) Establishment of baseline studies coordinated with predator (e.g. seal and penguin ... and will be closely coordinated with us and other nations' research efforts. 2. MATERIALS AND ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 357–377 : Auteur(s): Macaulay, M.C.

6. 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

7. Abundance, size and maturity of krill (Euphausia superba) in the krill fishing ground of Subarea 48.1 during the 1990/91 austral summer

   and nearshore zones. The mean density of krill was low in the oceanic zone (8.5 g/m 2), intermediate ... in the frontal (37.3 g/m 2) and neritic (28.1 g/m 2) zones, and extremely high in the nearshore zone ... (134.7 g/m 2). The last zone corresponds to the shelf break: or the shelf area where topographic eddies ... abundant in the slope frontal zone, having a mean density of 23.9 g/m 2 (411 000 tonnes), as contrasted ... . 2. MA1ERIALS AND METHODS The cruise of RV Kaiyo Maru was conducted in two stages (Ichii et al ... ., 1991), although this paper deals only with research activities of the second leg. Leg 2 covered the ... 3.1 Oceanographic Features Figure 2 shows horizontal salinity distribution at 10 m depth. Three ... Georgia. In the frontal region buoys 2 and 3 drifted eastward at first, then became entrained in the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 183–199 : Auteur(s): Ichii, T., H. Ishii and M. Naganobu

8. 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)

9. 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

10. Preliminary analyses of data collected during experimental phases of the 1994/95 and 1995/96 Antarctic crab fishing seasons

    Champion during Phases 1 and 2 of the experimental crab fishery were analysed using generalised additive ... data from the Phase 2 depletion experiments did not have significant negative slopes. The insignificant ... tagged and released during Phase 2. Four of the tagged crabs were recovered, and these crabs were at ... miles/day. Mark-recapture estimates of standing stock and density were made for the area around Phase 2 ... Clzainpion during Phases 1 and 2 of the experimental crab fishery were analysed using generalised additive ... catch data from the Phase 2 depletion experiments did not have significant negative slopes. The ... 000 crabs were tagged and released during Phase 2. Four of the tagged crabs were recovered, and these ... area around Phase 2's third depletion square. The assumptions of the mark-recapture model were ...

    Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 141–159 : Auteur(s): Watters, G

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