Résultats de la recherche

1. Krill (Euphausia superba) distribution in relation to water movement and phytoplankton distribution off the northern South Shetland Islands

   deployed at a level of 30 m from the surface because at this level krill concentrations are most frequently ... levels (0, 10, 20, 30, 40, 50, 75, 100, 125, 150 and 200 m). Chl-a concentration was determined by ... . This study suggests two factors responsible for krill concentration. One is a convergent accumulation ... circulation was studied with satellite-tracked buoys equipped with curtain drogues deployed at a level of 30 ... bouees suivies par satellite et equipees d'ancres de cape, deployees a 30 m de profondeur, niveau ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 123–140 : Auteur(s): Ichii, T., H. Ishii and M. Naganobu

2. Utilising data from ecosystem monitoring for managing fisheries: development of statistical summaries of indices arising from the CCAMLR Ecosystem Monitoring Program

   simulation for two forms of alternative hypothesis with data series of up to 20 and 30 years. In both forms ... Program, two lengths of time were investigated: 10 and 20 years. The correlation matrix was estimated ... two sets of trials consist of one in which the value of is fixed at 10 years and another in which it ... increase from 10- to 20-year time series resulted in little change in the median performance but in a ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 101–117 : Auteur(s): de la Mare, W.K. and A.J. Constable

3. Seabird by-catch by autoline vessels: do line setters increase the sink rate of integrated weight longlines?

   ., 2005). Currently seven autoline vessels and one Spanish-system vessel operate in these fisheries (SC ... between the two magazines in a pair marked either the beginning, or end, of the use of the line setter ... sink rate of one member of a pair did not affect that of the other. When the setting order required ... ) programmed to record depth at 0.5 m resolution every second. The TDRs were attached to the longline on 30 ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 107–114 : Auteur(s): Robertson, G., J. Williamson, M. McNeill, S.G. Candy and N. Smith

4. Food and feeding of the mackerel icefish (Champsocephalus gunnari) around South Georgia in January/February 1991

   to 3 877) and an unrepresentative coverage of the shelf from year to year. However, two pairs of ... superba ~ Themisto gaudi. Mysidacea [%] 160 140 120 100 80 60 40 20 0 Month 11-111 11 ... . MATERIALANDMETHODS The stomach contents of mackerel icefish were qualitatively analysed by one of us (K.-H. Kock ... studies revealed a considerable variation in the importance of each of these prey items from year to year ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 15–23 : Auteur(s): Kock, K.-H., I. Everson, S. Campbell, G. Parkes, Z. Cielniaszek and J. Szlakowski

5. Assessments of by-catch in trawl fisheries at Heard and McDonald Islands

   proportion of the total catch when large catches of target species were taken, indicating that CCAMLR's ... Island area could be a combination of (i) limiting the total by-catch in a year to the estimates of long ... -term annual yield, (ii) allowing catches of by-catch species of up to 100 kg in any one haul and (iii ... ) changing fishing grounds if the catch of any one of the by-catch species exceeds 100 kg and the total by ... than 0.1 over a 20-year period. The lowest y satisfying these rules was determined for the three ... 0 20 0.2 for C. rhinoceratus WG-FSATWG-FSA-97/30). L. squainifrons 1 25 11 360 0.1 ... old. The maximum age is uncertain because it is currently based on an estimate from one fish. Also ... the end of 20 years of exploitation should be 75% of the pre-exploitation spawning biomass and that ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 231–243 : Auteur(s): Constable, A.J., R. Williams and W.K. de la Mare

6. Quantification of Southern Ocean phytoplankton biomass and primary productivity via satellite observations and biogeochemical models (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   shelves/coasts, the marginal ice zone and open-ocean fronts. Their one-year time series of productivity ... highest monthly productivity number they calculated (based only on one year of data, 1997/98) was in ... /06, an interdis- ciplinary survey was conducted of East Antarctica (30°E to 80°E). The suite of ... using satellite ocean colour data. Strutton et al. 248 the two- to three-fold discrepancy between ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 247–265 : Auteur(s): P.G. Strutton, N.S. Lovenduski, M. Mongin and R. Matear

7. Effect of line sink rate on albatross mortality in the Patagonian toothfish longline fishery

   weights. Asymptotic sink rates (0.1-0.15 m/s) were achieved with 70 m intervals between 6.5 kg weights ... . Sink rates to 4 m depth were greatest with 35 m (0.44 m/s) and 50 m (0.33 m/s) between weights. For ... /s should greatly reduce the incidental take of albatrosses. For autoline vessels with gear and line ... spacings, averaged 2.72/s. At this rate the CFL Pioneer set 10 800 hooks (eight magazines) in about one ... rates to 4 m depth for these two weight spacings (0.44 m/s and 0.37 m/s respectively) were appreciably ... -browed albatrosses) and white-chinned petrels for about 20 and 33 S respectively. At 200 m spacings ... , these two species of bird would have about 70 and nearly 100 s before the sinking baits exceeded their ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 133–150 : Auteur(s): Robertson, G.G

8. Significant intra-annual variability in krill distribution and abundance at South Georgia revealed by multiple acoustic surveys during 2000/01

   March 2001 (late-season). The surveys were the first in a newly planned five-year series of observations ... surveys in one season would provide information on short-term variability that could be used to set data ... observations from previous years, krill density in the western box in the mid-season survey was less than that ... transects were nominally 80 km long. Two new transects were laid down using the same two-stage ... g m-2 in any year, that year could be considered one of ‘unusually low’ krill abundance, in which ... planned fi ve-year series of observations designed to complement and extend an existing time series ... 1980s). We hoped that conducting several surveys in one season would provide information on short-term ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 71–82 : Auteur(s): Brierley, A.S., C. Goss, S.A. Grant, J.L. Watkins, K. Reid, M. Belchier, I. Everson, M.J. Jessop, V. Afanasyev and J. Robst

9. Biology and harvesting of Dissostichus eleginoides around the Kerguelen Islands (Division 58.5.1)

   from year to year and highly dependent on the harvestable resources of Champsocephalus gunnari. Vital ... sont indiques entre parentheses. 1979/80 it 1983/84 1984/85 it 1988/89 1989/90 it 1990/91 (5 ans ... ................................. " .................. . 20 40 60 80 Lt (2crIl interval) 250 - 350 m -+- 350 - 450 m n=235 n=1069 100 120 -*- 450m ... S0 90 188 110 128 130 30 40 50 S8 78 S8 90 la8 118128 138 Longueur totals year to year and highly dependent on the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 85–106 : Auteur(s): Duhamel, G.

10. Preliminary results of a bottom trawl survey around Elephant Island in October and December 1987

    ) '- 10 20 10 Figure 8: 10 20 30 Chaenocephalus aceratus Oct. [n-2163] - Dec. [n - 1135 ... ] Notothenia rossii marmorata Dec. [n - 291] 60 40 20 567 89101112 15 40 50 60 70 80 Total Length ... out by RV Polarstern using a 140' bottom trawl with a small meshed liner of 20 mm. Sampling depth ... varied from 65-458 m. Standard trawling time was 30 minutes. The location of fishing stations is set out ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 185-200 : Auteur(s): Kock, K.-H.

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