Search results
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Fitting Euphausia superba into Southern Ocean food-web models: a review of data sources and their limitations
(sustained sampling in one place and wide area and time coverage) and via predators (long time series ... , or from one region to another. File: Atkinson-krill.pdf ... , time series, biomass and swarm-scale information), the fishery (sustained sampling in one place ... to schooling krill, or from one region to another. ... , and regularly with an estimated ~20% of the stock deeper than 200 m at any one time. The fourth undersampled ... . For example, the standard Jolly and Hampton (1990) method has been in use for 20 years but there have been ... Sea, there appear to be two ‘populations’ of krill, one in the ACC and another in the East Wind ... animals have received as much research attention as Antarctic krill (Euphausia superba ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 219–245 : Author(s): A. Atkinson, S. Nicol, S. Kawaguchi, E. Pakhomov, L. Quetin, R. Ross, S. Hill, C. Reiss, V. Siegel, G. Tarling (submitted to the 2008 Joint CCAMLR-IWC Workshop)
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Analysis of krill trawling positions north of the South Shetland Islands (Antarctic Peninsula area), 1980/81–1999/2000
and 1994/95 seasons (Table 1). Interestingly, the monthly variation of mean STP for these two years ... IIpOnYKTa (HanpH~ep, qHCJIeHHOCTb canbn r? Aonx sene~oro K ~ M I I X ) , Tatime ... Shetland Islands is one of the mail1 commercial krill fishing grounds. An enormous amount of fishing ... No data 6.5 65.2 1991/92 94.3 19.9 32.3 1992/93 1 399.6 29.2 30.1 1993/94 713.5 33.0 47.6 1994/95 14.9 ... effect on trawling positions. Ice conditions for recent fishing periods were also demonstrated to have an ... commercial krill trawling positions for the 1980/81 to 1999/2000 seasons in the area north of the South ... operations concentrated on the outer shelf in the early 1980s, along the shelf slope in the mid to late 1980s ... quality, such as salp abundance and the proportion of green krill, also seemed to have an increasing ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 25–36 : Author(s): Kawaguchi, S. and K. Segawa
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Brief report of the joint Soviet-Australian expedition of the USSR FRV Professor Mesyatsev to the Australian fishing zone around the territory of Heard and McDonald Islands, May-August, 1987
-aBCTpaJIJ.lHCKOH 3KCneAJ.lllJ.lJ.l B Pbl60JIOBHYIO 30HY ABCTpaJIJ.IJ.I BOKPyr OCTPOBOB XePA J.I MaKAOHaJIbA ... . YCJIOBJ.lH cpeAbl Ha lIIeJIbq,e OCTpOBa XePA 6blJIJ.I 6JIarOnpJ.lHTHbl AJIH 06pa30BaHJ.lH npOMblCJIOBblX ... was carried out during two periods : the first from 10 May until 27 June and the second from 24 July until ... 2 August. The Soviet Union was represented by 12 scientists, and Australia, by one observer ... Heard were favourable for the formation of commercial aggregations of Champsocephalus gunnari during the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 75-103 : Author(s): Gherasimchook, V.V., V.N. Brodin, A.V. Kljausov, I.B. Russelo, P.V. Tishkov and N.B. Zaremba
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Estimating unaccounted fishing mortality in the Ross Sea region and Amundsen Sea (CCAMLR Subareas 88.1 and 88.2) bottom longline fisheries targeting Antarctic toothfish
reported use of more than one gear type (Spanish line and trotline), and only two vessels used trotline ... are de- signed to be stable in seawater and may retain their structural integrity for many years ... to better CCAMLR Science, Vol. 19 (2012): 17–30 17 ESTIMATING UNACCOUNTED FISHING MORTALITY IN THE ROSS ... attached to sections of line each year, and the associated length of longline lost (iii) provide ... / Description: Stock assessments rely on estimates of total mortality resulting from fishing activities ... counted in estimates of total fishing removals or otherwise accounted for in stock assessment models. The ... unaccounted fishing mortality from lost lines in these fisheries is provided. These estimates suggest that on ... average 208 tonnes of Antarctic toothfish mortality may be unaccounted for annually. While the current ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 17–30 : Author(s): Webber, D.N. and S.J. Parker
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Estimates of circumpolar abundance of Antarctic krill based on recent acoustic density measurements
in numerous areas. Acoustic surveys have been conducted regularly in some areas for nearly 20 years ... of krill abundance has been subject to considerable research over the last 20 years (Greene et al., 1998 ... tonnes per year (a factor of 20) to 100-500 million tonnes per year (a factor of 5). An earlier ... BOSPOCLUHM npoMbIcnoM KpHJlR HaAO 6 y ~ e ~ YYHTbIBaTb Ce30HHbIe M JIOKaJIbHbIe IIOCJIeACTBIUI ... Paper Title: Estimates of circumpolar abundance of Antarctic krill based on recent acoustic ... historical information on the overall range of krill. The biomass estimates fall between 60 and 155 million ... estimates and others can be explained by a number of factors such as: an underestimation of the range or the ... of the demand for krill by predators. Even if these low krill biomass estimates are correct, regional ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 87–99 : Author(s): Nicol, S., A.J. Constable and T. Pauly
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Timing of clutch initiation in Pygoscelis penguins on the Antarctic Peninsula: towards an improved understanding of off-peak census correction factors
two components. One is a model to estimate the date of peak egg laying for a given site in a given ... 0.6 0.8 1.0 Fr ac tio n of m ax im um c ou nt 0 5 10 15 20 25 30 Days since maximum count ... 0 5 10 15 20 25 30 Days since maximum count 0 5 10 15 20 25 30 Days since maximum count Adelie gentoo ... Days since maximum count 0 5 10 15 20 25 30 0 5 10 ... Paper Title: Timing of clutch initiation in Pygoscelis penguins on the Antarctic Peninsula ... : towards an improved understanding of off-peak census correction factors Abstract / Description: Penguin ... censuses on the Antarctic Peninsula are often subject to logistical challenges that preclude nest counts ... . In this paper the authors present an analysis relating to both these challenges. Clutch initiation ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 149–165 : Author(s): Lynch, H.J., W.F. Fagan, R. Naveen, S.G. Trivelpiece and W.Z. Trivelpiece
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Methods of age determination for mackerel icefish (Champsocephalus gunnari Lönnberg 1905) from the South Georgia Island shelf
of fish longer than 30 cm having an enlarged otolith centre. An age/length key for the third quarter ... of the year was also calculated. File: 04-Frolkina.pdf ... of otolith could be used to adjust age assessments of fish longer than 30 cm having an enlarged otolith ... centre. An age/length key for the third quarter of the year was also calculated. ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 37–49 : Author(s): Frolkina, Zh.A.
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Potential nursery areas for fish in the Prydz Bay region
. This species was abundant (up to 9 100 were caught in a 30 minute haul) especially near the shelf break ... antarcticum. This species was abundant (up to 9 100 were caught in a 30 minute haul) especially near the shelf ... of P. antarcticum catches. 375 -64 individuals/30 minute trawl 1 5 0 10 0 20 0 Q) "Cl 0 B 30 ... minute trawl 1 5 0 10 0 0 Cl) 20 -d 0 E 000 0 30 0 :.;::l 0 .s 0 00 0 0 0 °0 0 40 0 0 50 ... in a 30 minute haul) especially near the shelf break. The dominant size class was of 45 mm standard ... espece etait abondante (un trait de 30 minutes a capture jusqu'a 9 100 poissons), notamment a proximite ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 369–380 : Author(s): Williams, R.
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CCAMLR ecosystem monitoring and management: future work
from one year to the next. For more mobile species, the effects may be promulgated through the whole ... . Consequently, changes in predator performance from one year to the next may simply be due to this natural ... scale during the early stages of the fi shery and to 0 1 2 3 0 1 2 3 D en si ty 0 10 20 30 ... by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) since 1982. Article IX ... system, (ii) methods for assessing the status of the system, (iii) decision rules on how to adjust ... : Harvesting of marine living resources in the Southern Ocean is managed by the Commission for the Conservation ... of Antarctic Marine Living Resources (CCAMLR). CCAMLR is widely known for its ecosystem approach to ... use scientific evidence in the decision-making process. Even though this approach was based on the ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 233–253 : Author(s): Constable, A.J
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Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea, Antarctica
340–360 mm total length (TL) and about 3–4 years of age, and that 95% were mature at about 370–400 mm ... TL and 6–8 years of age. Counts of growth zones in sectioned otoliths were used to determine ages ... a significantly larger mean asymptotic maximum size than males. Maximum ages of 8 and 11 years were obtained ... ;360 mm total length (TL) and about 3–4 years of age, and that 95% were mature at about 370&ndash ... were in advanced stages of digestion, except for two fish eggs. One stomach contained a single ... ) and about 3–4 years of age, and that 95% were mature at about 370–400 mm TL and 6–8 years of age. Counts ... maximum size than males. Maximum ages of 8 and 11 years were obtained for male and female fish ... longueur totale (LT) et à environ 3–4 ans d'âge, et que 95% l'étaient à environ 370–400 mm de LT et ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 139–165 : Author(s): Sutton, C.P., M.J. Manning, D.W. Stevens and P.M. Marriott