Search results
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Calibration of an acoustic echo-integration system in a deep tank, with system gain comparisons over standard sphere material, water temperature and time
, and at 0.5° C (Figure 2). By maintaining near zero offset (±1°) in one of the two directions, the alongship ... HaCTOSHQaSI pa60Ta onHCbIBaeT TeopHIO H npou,e,l{ypy KanH6poBKH aKycTHqeCKOR CHCTeMhl 3XO-HHTerpau,HH ... CHMpa,l{ EK 500 C nOMOlQblO npe06pa30BaTenSI C paclQenneHHbIM nyqOM B oxna:>K,l{aeMOM Ca,l{Ke rny6HHoR ... ,l{Hana30H TS -ycHneHHSI, BKnlOqaSI BnHSIHHSI TeMnepaTypbI, cTaH,l{apTHOro mapa H BpeMeHH, COCTaBnSIeT 2,9 ... outlines the theory and procedures for calibrating an echo integration acoustic system with a standard ... Paper Title: Calibration of an acoustic echo-integration system in a deep tank, with system gain ... sphere. It presents the results of an extensive calibration of a Simrad EK500 scientific echosounder with ... an echo integration acoustic survey. To minimise these effects, the TS gain and SA gain parameters ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 127–144 : Author(s): Demer, D.A. and R.P. Hewitt
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Quantifying vessel performance in the CCAMLR tagging program: spatially and temporally controlled measures of tag-detection rates
and 88.2 by vessel for a space window of 20 km and time window of one season (Figure 2). The amount ... variability of the recapture rates are accounted for in the calculation by using CCAMLR Science, Vol. 20 ... on 1 December each year, and ends when the quota has been fully caught which, in recent years, has been ... all fishing events of the case that were matched with at least one control event, the ratio ... an integrated stock assessment. Previous attempts to assess the relative reliability of vessels in ... detecting tagged fish have been inconclusive due to low numbers of recaptures after controlling for spatial ... controlling for spatial and temporal variables using a case-control study design, and uses this method to ... develop relative indices for detection rate performance for vessels involved in the Antarctic toothfish ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 73–80 : Author(s): Mormede, S. and A. Dunn
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Potential impacts of bottom trawling on benthic communities in Prydz Bay, Antarctica
that bottom trawling in the past 20 years has had a considerable effect on the community structure ... B 3aJIHBe TIpIO~3 B 1990/91 r. C06paHHble ~aHHble HCnOJIb- 30BaJIHCb B H3Y'-leHHH nOTeH~HaJIbHOrO B03 ... integridad. 1. INTRODUCTION In the last 10 years, a number of studies have highlighted the impacts ... for a standard haul duration on the bottom of 30 minutes at 3 knots. The sweeps (25 mm diameter combination rope ... Paper Title: Potential impacts of bottom trawling on benthic communities in Prydz Bay, Antarctica ... Abstract / Description: This paper presents data on benthos retrieved in bottom trawls during a survey of ... examine a potential impact of bottom trawling on benthic communities in this region. The benthos was ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 403–410 : Author(s): Constable, A.J.
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Physical oceanographic setting of the Siedlecki January 1987, South Shetland Island data set
par une zone d"eau de largeur variee (10 a 100 km) que I'on peut considerer comme une eau ... -Scotia (le Front de Scotia), la Oll I'on rencontre les eaux du Pacifique, on remarque des indications ... soit une caracteristique ecologique importante liee a cette abondance. Pe3IOMe HeB~aneKe OT ... xonO~Hble nOn.HpHble 3aBO~bI MOp.H Y3~~enna BCTpeqaIOTC.H C oonee TennbIMH U;HpKYMnOn.HpHbIMH Bo~aMH ... ): an intrusive layer of Pacific derived relatively warm-salty water near 300 meters depth and deeper ... speculated that mixing of Weddell and Pacific waters near the tip of the Antarctic Peninsula is an important ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 161-184 : Author(s): Gordon, A.L.
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Characteristics of krill aggregations in the South Sandwich Islands subarea in January–February 2000
0 0 1 3 5 7 9 11 13 15 (c) 0.00 10.00 20.00 30.00 40.00 50.00 3 9 15 21 27 fre qu en cy ... ,% Fr eq ue nc y (% ) 50 40 30 20 10 0 3 9 15 ... 21 27 (b) 0 5 10 15 20 25 30 0 0.75 1.75 2.75 3.75 4.75 5.75 Fr eq ue nc ... y, % Ln, 30 25 20 15 10 5 0 Fr eq ue nc y (% ) 0 0.75 1.75 2.75 ... spatial distribution patterns of krill aggregations on the horizontal and vertical distribution of krill ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 145–164 : Author(s): Kasatkina, S.M., A.P. Malyshko, V.N. Shnar and O.A. Berezhinsky
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Results of fish stock assessment survey, South Georgia, December 1987 - January 1988
cm)(Figure 5c). Only 20 individuals greater than 30 cm were collected. 3.7 Dissostichus ... two year classes are small (Figure 3b). As members of this strong year class are removed by fishing ... of N. squamifrons showed the most drastic decline of the species examined. The population dropped by one to two ... e 1 2 1 0 c 8 e n 6 t 4 2 0 ( c) 6 P 5 e 4 r c 3 e n 2 t 1 0 0 0 Champsocephalus gunnari total length frequency (n=19366) 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 Length ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 19-52 : Author(s): McKenna, Jr., J.E. and S.B. Saila
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Diurnal variations in biological characteristics of krill, Euphausia superba Dana, to the west of the South Orkney Islands, 24 March to 18 June 1990 - based on data reported by a biologist-observer
tows per station, over one day). An increase in the total average size of animals caught in periods ... (only one sample of krill per station) is discussed. A gradual decrease in the average size of krill ... of a series of catches made using a standard commercial trawl (9 to 12 tows per station, over one day ... ). An increase in the total average size of animals caught in periods of light or darkness was noted at several ... one day). An increase in the total average size of animals caught in periods of light or darkness ... is taken into account, together with the possibility of swarm drifting with the current, one may conclude ... (only one sample of krill per station) is discussed. A gradual decrease in the average size of krill ... .51 MHrpaU;H.5I He Ha6JIIO,llaJIaCb (B t.IaCTHOCTH B KOHu;e ce30Ha) ,llHeBHbIe H3MeHeHH.5I ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 201–222 : Author(s): Vagin, A.V., R.R. Makarov and L.L. Menshenina
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Integration of CPUE data into assessments using the Generalised Yield Model
/ Description: For the last three years, CCAMLR's Working Group on Fish Stock Assessment (WG-FSA) has ... For the last three years, CCAMLR's Working Group on Fish Stock Assessment (WG-FSA) has accorded ... in the final year and of the proportion of times the spawning stock biomass (SSB) fell below 20% of its pre ... the 95% posterior credibility intervals for fishable biomass, but in two years (1996 and 1997 ... three years, CCAMLR's Working Group on Fish Stock Assessment (WG-FSA) has accorded high priority ... ). B n a ~ ~ o i i c r a T b e n p e a n a r a e T c x M e T o n n K n I o u e H I 4 z r l t ~ @ O p ~ a u ~ i t l 0 TeHAeHut iRX CTEiHHapTE.i'30BaHHOTO CPUE B OUeHKM G Y - ~ 0 n e n l . i . M e ~ o n OCHOBaH ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 65–74 : Author(s): Kirkwood, G.P. and A.J. Constable
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Annual changes in species composition and abundance of myctophid fish in the north of South Georgia (Subarea 48.3), Antarctica, during austral winters from 2002 to 2008
with a horizontal open- ing of ca. 20 m and a vertical opening of ca. 30 m was used throughout the survey. Inner ... : (a) Protomyctophum choriodon. (continued) A 0% 10% 20% 30% 40% 50% 60% 70% 40 50 60 70 80 90 Standard ... (n = 20) 2004 (n = 33) 2008 (n = 643) 70 60 50 40 30 20 10 0 P er ce nt ag e co m po si ... 90 Standard length (mm) (a) Iwami et al. 160 C 0% 10% 20% 30% 40% 50% 60% 20 30 40 50 ... samples collected by scientific observers on board Japanese commercial krill fishing vessels in the area ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 155–163 : Author(s): Iwami, T., M. Naganobu, K. Taki and M. Kiyota
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Assessments of the stocks of Notothenia rossii marmorata and Champsocephalus gunnari in the South Georgia area
to two consecutive years of heavy fishing can occur and still be followed by one year class from ... apparently recovered after each of the first two periods. The age at recruitment is 3-4 years, hence up ... marmorata M Champsocephalus qunnari B paHOHe IOJKHOH feOpI'MH C Hcno~ h30BaHHeM AaHHhrx CCCP no npo6aM ... Working Group meeting, this paper presents some refinements on the previous year's analyses. Although ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 1-21 : Author(s): Cooke, J.G.