Search results
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Some thoughts on precautionary measures for the krill fishery
the potential yield model developed by the CCAMLR Scientific Committee's Working Group on Krill ... discussed. A precautionary catch limit, based on the potential yield model developed by the CCAMLR ... based on the use of a model that conceptually is relatively simple and is given by the formula: In ... synoptic survey of krill will be affected by the distribution of krill over a much larger area; repeat ... flow are influenced considerably by local patterns on the shelf and at the shelf-break. Within the ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 1–11 : Author(s): Everson, I. and W.K. de la Mare
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Acoustic estimates of krill density at South Georgia, 1981 to 1998
1994 austral summer seasons were characterised by particularly low densities of krill (upper 95 ... , 1991 and 1994 austral summer seasons were characterised by particularly low densities of krill (upper ... seems to be an integral feature of the South Georgian marine ecosystem (reviewed by Brierley et al ... . The area covered by the 1982 cruise was very extensive and included long transects in oceanic water ... years; by convention the year given refers to the year in which the season ended) BAS has conducted ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 47–57 : Author(s): Brierley, A.S., J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson
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A balanced model of the food web of the Ross Sea, Antarctica
hypothesis that depletion of Antarctic toothfish by fishing would change the diet of predators of toothfish ... (Weddell seals, orca, sperm whales) by large amounts throughout the Ross Sea, though the importance of ... model does not support the hypothesis that depletion of Antarctic toothfish by fishing would change the ... diet of predators of toothfish (Weddell seals, orca, sperm whales) by large amounts throughout the ... other parts of the ecosystem as well as the target species, both directly from by-catches, and ... indirectly by altering the species composition and inter-specific relationships within the ecosystem ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 1–31 : Author(s): Pinkerton, M.H., J.M. Bradford-Grieve and S.M. Hanchet
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Age determination of Champsocephalus gunnari Lönnberg, 1905 (Channichthyidae) taken in the South Georgia area in 1990
composition of catches taken by Akademik Knipovich had three peaks corresponding to size groups of 16-18, 24 ... the South Georgia area. In February 1990 the size composition of catches taken by Akademik Knipovich ... significantly slower growth rate when compared with earlier data produced by most authors (see Table 1). It ... should be noted that the American scientist, R. Radtke, determined age by counting microincrements of ... determining ftsh age by counting daily microincrements on otoliths since, according to O. Pannella's data ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 285–293 : Author(s): Kochkin, P.N.
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Target strengths of krill at 136 and 20 kHz
krill target strength was made by ensonifying encaged live krill and using trawl hydroacoustic method ... KHZ S.M. Kasatkina* Abstract Estimation of krill target strength was made by ensonifying encaged ... identified lower target strengths (by almost 10 dB) compared to those values used until now in biomass ... estimates as recommended by the Post-FIBEX Workshop (Anon., 1986). With this in mind the CCAMLR Working ... krill TS carried out by AtlantNIRO from 1980 to 1985. We feel that these may be useful in general ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 141–157 : Author(s): Kasatkina, S.M.
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Low genetic diversity in the Antarctic toothfish (Dissostichus mawsoni) observed with mitochondrial and intron DNA markers
appeared to be characterised by low diversity; no genetic variation was detected with restriction enzyme ... Division 58.4.2. D. mawsoni appeared to be characterised by low diversity; no genetic variation was ... 75°S (Gon and Heemstra, 1990). D. mawsoni appears to be restricted to waters managed solely by ... from 200–500 mg of muscle tissue by homogenisation and digestion with proteinase-K at 55°C for 4 h ... . After digestion, DNA was extracted with phenol:chloroform, followed by chloroform:iso- amyl alcohol ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 43–51 : Author(s): Smith, P.J. and P.M. Gaffney
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Status of krill target strength
,lleJIaHHbIX B YCJIOBH5IX BbICOKoro COOTHOrneHH5I CHrHaJIa K rnyMy, COOTBeTCTBYIOT o6111eH KapTHHe. IIpHBO ... K rnHpoKoMY ,llHana.30HY ,llJIHH, aKycTH4ecKHx 4aCTOT H 0pHeHTal\HOHHbIX n apaMeTpoB. Resumen Los ... aggregations of live euphausiids and should not be affected by a frequent cause of bias in single-animal ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 101–126 : Author(s): Foote, K.G., D. Chu and T.K. Stanton
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Preliminary model of krill fishery behaviour in Subarea 48.1
~ ~ H B M H ~ C T O H H 3JIeaaHT B YepeAyWqHeCR TOAbI, IIpMBeAeT K CpeAHeMy roAoBOMy BbInOBy ... , K O T O P ~ I ~ ~ 6 y ~ e T aHanormeH cospeMeHHoMy. T ~ M He MeHee, B TOM cnyqae B TerIeHMe YepeAymwHxcrr neT BbInOB ... data over the period 1989 to 1992. The distribution of catches predicted by the model, which is ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 71–79 : Author(s): Agnew, D.J. and V.H. Marín
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Consideration of major issues in ecosystem monitoring and management
within which to investigate krill availability. Vital rates can be investigated directly and also by ... krill availability. Vital rates can be investigated directly and also by means of CEMP. The overlap ... to which the ecosystem ap- proach has been implemented by CCAMLR, with a view to examining how the ... was developed by Butterworth et al. (1991, 1994) and Constable and de la Mare (1996) is a ... ). Information on krill growth has recently been reviewed by Siegel and Nicol (2000). Although it is diffi ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 213–232 : Author(s): Everson, I
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On the power to detect changes using the standard methods for monitoring parameters of predatory species
Islands of lengths of first incubation shifts by penguins(Standard Method A2.1), duration of penguin ... incubation shifts by penguins (Standard Method A2.1), duration of penguin foraging trips (AS.1), penguin ... power analysis were compiled by the CCAMLR Secretariat (CCAMLR, 1989). That paper described the method ... -linear trend in a parameter. Methods for such analysis were presented by Gerrodette (1987). When the ... described by Nam (1987). The quantities required in a power analysis for detecting trends are essentially ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 377–397 : Author(s): Boveng, P. and J.L. Bengtson