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1. A simulation study of the method of deriving natural mortality rate using data for Champsocephalus gunnari in Subarea 48.3

   greater than zero if the assumed value is greater than the “true” one. File:  04-Gasyukov-and ... and is close in its shape to normal distribution of the values close to the "ideal" one. Two ... standardised effort. Year Total catch Effort 80/81 29464 14142 81/82 47454 7182 82/83 131576 20420 83/84 ... , -0.030] : -0.062 -0.047 [-0.177 ; 0.009] 80 , 60 ~il=:1,0 40 20 i I - 0,4 -0,3 - 0,2 - 0,1 ... annual fishing mortality Fay, and abundance Na,y rates by age and fishing year, where terminal fishing ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 69–83 : Auteur(s): Gasyukov, P.S. and R.S. Dorovskikh

2. Some principles for fisheries regulation from an ecosystem perspective

   objectives are being met to be assessed. The advantages of using a feedback method of regulation are ... quantities which can be robustly estimated, thus allowing the degree to which objectives are being met to ... risk of changes in the marine ecosystem which are not potentially reversible over two or three ... exploited stock in advance of the substantial development of its fishery. This is important for two ... seems reasonable to assume that the overall objectives of the convention are being met as far as is ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 323-339 : Auteur(s): de la Mare, W.K.

3. A comparison between otoliths and scales for use in estimating the age of Dissostichus eleginoides from South Georgia

   the two readers in estimating the age of D. eleginoides using otoliths and scales. File:  05ashford ... sides. Using ANOVA, we compared data obtained from the two structures to test the hypothesis that ... using otoliths. For scales, bias occurred for both readers between readings; for otoliths, only one ... reader was biased. Residual variances indicated one reader was relatively more precise than the other in ... . Sustainable exploitation rates should have been 20-30% of that based on age determinations from scales, in ... use of otoliths and scales in estimating tootlifish age 0 10 20 30 40 50 10 20 30 40 50 Reader l ... as one year if the fish was taken after 1 July but not before. Scales Typically, annuli on ... , used to test for differences between repeated age estimatiol~s using scales and otoliths by two ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 75–92 : Auteur(s): Ashford, J.R., S. Wischniowski, C. Jones, S. Bobko and I. Everson

4. Notes on the use of virtual population analysis for stock assessment of the mackerel icefish, Champsocephalus gunnari (Lönnberg, 1906) in Subarea 48.3 for the 1990/91 and 1991/92 seasons

   techniques, from 1991 back to 1977. The predicted age structure, dominated in recent years by the 1987 year ... -class (1 year olds in 1988), was quite robust, despite the use of various combinations of survey and ... proportion of 5 year olds, which was not observed during the survey on Falklands Protector in January 1992 ... . Breakdown in the credibility of the VPA results in most recent years is attributed to the invalid assumption ... specified number of younger Fs for that year. The default is one times the mean of the four younger Fs (i.e ... provided in Table 2. The indices were input as two fleets in the ADAPf3 run and as one combined index in ... heavily dominated by the year class recruiting as 1 year olds in 1987/88. Combination of the two indices ... effect of setting a TAC for 1992/93. 56 One approach is to use the results of the two most recent ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 49–79 : Auteur(s): Parkes, G.

5. Preliminary report on biological observations and exploratory fishing data collected in the South Georgia area during the 1985/86 cruise of MT Carina

   -going fish stock monitoring program conducted by the Sea Fisheries Institute, Gdynia. Codends of two ... % while N. rossii and D. eleginoides were present only as by-catch. In sampling catches two length groups ... . georgianus was represented by three length groups: 20–24, 32–41 and 42–56 cm. N. gibberifrons was also ... georgianus, Notothenia gibberifrons and N. rossii marmorata. Scales and otoliths were also collected for age ... + Age groups (years) O~~==~,==~==~,===;~~,==~==~,==~~ Figure 8 20 30 40 ~ Total length (cm ... in those two seasons consisted of the year class of 1980 (Sosinski, unpublished). In the catches ... grcups (years) 200 O~~~I~~~I~~~I==~~I==~~ 20 3J 40 50 Total length (cm) Figure 7 Length and age ... nototheniids. The length distribution of P. georgianus, especially in the last two years, did not undergo ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 65-97 : Auteur(s): Kreft, K. and J. Szynaka

6. Defining smaller-scale management units to further develop the ecosystem approach in managing large-scale pelagic krill fisheries in Antarctica

   involves two different types of unit: the ‘harvesting unit’, which is at the scale of the metapopulation of ... considered separate small-scale areas if the vector of transport is relatively predictable from one year to ... 1991 1992 1993 1994 1995 1996 1997 1998 1999 C at ch (t on ne s) Year 129 Defi ning ... harvested species. The inte- gration of these components involves two different types of unit: the ... explored in terms of the structure of animal populations. A group of animals that are continuously ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 117–131 : Auteur(s): Constable, A.J. and S. Nicol

7. The gentoo penguin as a candidate species for the CCAMLR Ecosystem Monitoring Program

   features of special relevance to the CEMP. File:  30-Croxall-and-Williams.pdf ... years at Bird Island, South Georgia and at the South Shetland Islands (both within Integrated Study ... ). Only in one year (1985) did the proportion of E. superba fall below 65%. During the winters of 1987 ... Maturity With typical ages of first breeding being at two and three years old (Williams, 1990), gentoo ... WG-CEMP-90/14 THE GENTOO PENGUIN AS A CANDIDATE SPECIES ... ) availability of baseline data at one or more sites. On this basis, the following species were selected as ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 483–488 : Auteur(s): Croxall, J.P. and T.D. Williams

8. The Kerguelen database

   . Length frequency distributions of the species are also provided for the period 1979/80–1985/86. File:  02 ... the CPUE Catches per species from split-year 1979/80 to 1985/86. Values of the total fishing ... a".:'O .9.00 .q.IO aQ.2U • ~.30 o1q.~O • ~.50 50.ou ~o.IO ~(I.20 50.30 5U .. !lCi ... .30 Ob.40 4& .50 41.00 07.10 47.20 41.30 47.00 47.50 .t .00 "fi.IO o~ .20 4ft.30 till. QU ... ilK .50 .9.00 4Q.IO . OQ.20 .Q.30 Cq.QO OQ.5U ~O .00 50.10 50.20 50.30 5u.40 511.50 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 23-54 : Auteur(s): Duhamel, G.

9. Preliminary model of krill fishery behaviour in Subarea 48.1

   Elephant Islands in alternate years would result in an average yearly catch similar to that at present ... during alternate years. File:  06agnew-marin.pdf ... Elephant Islands, the two major fishing areas, in alternate years. Closures were modelled by ... 48.1). Although only about 20% of the South Atlantic catch has been taken in Subarea 48.1, the catch ... in this area has been very consistent both in quantity and position; about 80 000 tonnes is taken ... ., penguins and seals). This concern has arisen because 74 to 90% of the annual catch of krill in Subarea ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 71–79 : Auteur(s): Agnew, D.J. and V.H. Marín

10. Trawl bag selectivity in the Champsocephalus gunnari fishery

    and the selectivity factor was 3.10 for a mesh size of 80 mm. Comparison of these results with results ... from previous years demonstrates close similarity. A significant increase in modal length (up to 34-35 ... - 7 19 - 16 20 30 38 21 - 20 22 - 20 23 - 24 24 38 64 25 534 373 26 1436 866 27 2984 1430 28 ... was 3.10 for a mesh size of 80 mm. Comparison of these results with results from previous years ... of 299 80 cm. Comparison of these results with those from previous years shows close similarity ... "Khek-4M". 305 I o 100 -~3.S-3. ( I I 75f1~f. ISO 75fJli+ /20 I I ~8D-:93.5-3. f I ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 295–312 : Auteur(s): Bidenko, V.G. and I.G. Istomin

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