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1. Some comments on the procedure for testing estimators of krill abundance which utilise survey data

   distributions from surveys. ‘Two-level’ models of krill distribution are considered. These achieve overall ... concentrations; these concentrations are then located at random within the survey area. These ‘two-level’ models ... essential difficulty is that the data are collected along one-dimensional transects, whereas it is a two ... distributions from surveys. "Two-level" models of krill distribution are considered. These achieve overall ... concentrations; these concentrations are then located at random within the survey area. These "two-level" models ... density trend. Substitution of a fully random survey design by a systematic one would be a satisfactory ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 191–205 : Autor(es): Butterworth, D.S., D.L. Borchers and D.G.M. Miller

2. Krill fishing in the Scotia Sea in relation to bathymetry, including the detailed distribution around South Georgia

   results are discussed in relation to the ecology of krill and the fishery's interaction with local ... negligible fishing occurred in the following two seasons. In 1994 the fishery was almost totally based over a ... appear that areas well to the west (-42"W and 54"s) were targeted in some years (CCAMLR Statistical ... restricted area of about 30 x 20 km. There were also a few isolated hauls made outside this area. During ... in a CCAMLR reporting quarter of the year on at least one occasion between 1986 and 1992. Based on ... the year on at least one occasion (shaded areas) or on more than one occasion (open squares). The data ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 1–17 : Autor(es): Murphy, E.J., P.N. Trathan, I. Everson, G. Parkes and F.H.J. Daunt

3. Population genetic structure of Patagonian toothfish in the West Indian Ocean sector of the Southern Ocean

   Marion (n = 2) Islands were typed using two fragments of mitochondrial DNA (mtDNA) and seven nuclear ... using two fragments of mitochondrial DNA (mtDNA) and seven nuclear microsatellite loci. MtDNA haplotype ... les groupes géographiques (ADNmt φCT = –0,003; microsatellite φCT = 0,004), ce qui met en évidence ... increased in economic value since the start of commercial exploitation, approximately 17 years ago, within ... fi sh had been at liberty for 0.7 to 3.8 years, demonstrating that under some circumstances D ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 21–32 : Autor(es): Appleyard, S.A., R. Williams and R.D. Ward

4. The utilization of seabird censuses for krill monitoring

   sample the same spot under the same conditions in two consecutive years. Moreover, other parameters ... are considered. These two representations of the set of observations are reduced in dimensions by ... , but to obtain a picture of the directions where the differences occur. Two applications of the ... is also highly sensitive to non-normally distributed variables and not defined if one or more of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 393-425 : Autor(es): Marschoff, E.R., J.G. Visbeek and L.R. Fontana

5. Towards the development of a management plan for mackerel icefish (Champsocephalus gunnari) in Subarea 48.3

   existing CCAMLR decision rules, would preclude the fishery's ever opening. Several possible ... years of poor krill availability. Thus natural  ortality of C. gunnari may, in some years, increase by a ... the time the stock is only depleted for one or two years. This behaviour is a direct result of the ... -year projection period, in only one-third of these was the spawning stock level less than 20% of the ... years, indicating perhaps that krill scarcity is also variable. The amount of krill present at any one ... years 1978 and 1984 there are no survey estimates from which one could derive estimates of M, but the ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 63–77 : Autor(es): Agnew, D.J., I. Everson, G.P. Kirkwood and G.B. Parkes

6. Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined with various codends

   mesh size of 80 mm, currently used on factory trawlers, as well as codends with a structure resembling ... level of up to 80-90%, and a second one, resembling a typical selectivity ogive. Unfortunately, this ... O'IepeAb OXSaTHTb SepeSO"lHble KyTKH C pa3MepOM H'IeH S 80 MM, Hcnon b3yeMhle S HaCTOH~ee BpeMH Ha ... at a 80-90% level clearly ends at this length. with respect to longer fish, the codend material ... ). Both ogives are similar, consisting of two sections: the initial one characterizes the selectivity ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 1-48 : Autor(es): Zaucha, J.

7. Long-term monitoring of krill recruitment and abundance indices in the Elephant Island area (Antarctic Peninsula)

   one- and two-year-old krill (R 1 and R 2 respectively). Statistically significant fluctuations in ... for the Elephant Island area with regard to the representativeness of the study area (60°-62 o 30´S ... and 53 o-57 o 30´W) for proportional recruit and density indices. Proportional recruitment indices ... analysis. Results are compared for one- and two-year-old ]two juvenile stocks and therefore data from south of 62'30's are not included in the calculation of ... the statistical package S-Plus. The null hypothesis that there is no difference between years is ... examine which years, taken one at a time, are significantly difkrent 8rom the remainder. Significance ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 19–35 : Autor(es): Siegel, V., W. de la Mare and V. Loeb

8. CCAMLR ecosystem monitoring and a feedback management procedure for krill

   l'ecosysteme de la CCAMLR met au point une technique pour deceler des baisses it court terme de performance ... alter conservation measures based on options in Article IX of the CCAMLR Convention and dictated by the ... sufficient time to ensure that the objectives set out in Article IT of the CCAMLR Convention are not ... , Article IT can be translated, in the case of the predators, to ask the general question "Will fishing for ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 345–350 : Autor(es): Constable, A.J.

9. Distribution and size of Antarctic krill (Euphausia superba Dana) in Polish commercial catches taken in the Atlantic sector of the Southern Ocean from 1997 to 1999

   in one concentration can be as dense as 30 000 specimens per m-3 of water (Hamner et al., 1983 ... 1 24 3 1 06 8 M ar ch 1 79 3 90 8 So ut h Sh et la nd s 19 97 M ay 4 72 4 1 ... (% ) Elephant South Shetland 1999 0 5 10 15 20 25 30 35 40 45 50 55 60 Length (mm) Fr eq ue nc y ... 55 60 Frequency (%) M ay Ju ne So ut h Sh et la nd s, 1 99 7 0481216 25 30 35 40 45 50 ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 83–105 : Autor(es): Jackowski, E

10. Analysis of results from demersal fish surveys at South Georgia, undertaken by the United Kingdom and the USSR, January and February 1990

    ci z 70 60 50 40 30 20 10 0 f 0 1 2 3 4 5 6 7 Catch (tonnes) of C. gunnarl One ... difficulty in the area to the southern part of the west shelf (squares 19 and 20). The reports of the two ... location on the two surveys, one month apart, gave some support to the view that there may be more than ... that some form of replication had taken place. There were two schools of thought, one suggesting that ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 223–254 : Autor(es): (Report of a Joint UK/USSR Workshop, 23 to 27 July 1990)

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