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1. On the instantaneous natural mortality rate of Champsocephalus gunnari, South Georgia (Subarea 48.3)

   that the instantaneous rate of mortality Z=M and where Nil = catch of age group a which is fully ... represented in the catch; and Ell = fishing effort. It is assumed that fishing effort for groups a and a +1 ... ' = mean age in the catch; M=_I_ t - t l = ftrst age group, fully represented in the catch, tic L(a ... +0.5)Na a=tl t =----- tic LNa a=t' tk = oldest age group in the catch. (iv) The Robson ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 313–326 : Autor(es): Frolkina, G.A. and R.S. Dorovskikh

2. Analysis of changes in biomass of fish stocks in the South Georgia area in 1976/77-1986/87

   two fishing seasons (1978;79 and 1986/87), only catch rJsults of fishing vessels were used here. On ... eight out of eleven fishing seasons in the period studied. Catch results of the research vessel ... . This was especially visible in the 1986/87 season, when catch results of a trawler were much higher ... operations were direct~d mainly at C. gunnari. In the seasons in which mixed catch~s prevailed (1977;78 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 185-211 : Autor(es): Mucha, M. and W. Ślósarczyk

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

   represented in the catch beginning from age ar is: ak F y = L Wa,y x F a,y a=a/ where Wa,y are weight ... 0;. (5) (6) (7) (8) (9) (10) (11) (ill) The catch weight: Cy = L Wa+.!. y Na,y ... : (13) where q is catchability factor. (v) Catch-at-age and fishing year, Ca,y: (14) Thus the ... ; Cy - total catch by weight by fishing years; q - catchability factor; Sa - age selectivity factor ...

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

4. Factors that may influence the accuracy of abundance estimates from CCAMLR tag-recapture programs for Dissostichus spp. and best practice for addressing bias

   consequent risk of overfishing, is a higher priority issue than maximising the catch during the development ... the catch (e.g. size of fish) M̂ M> N̂ N> Low Medium Release tagged fish that are representative ... of the catch Size-specific M̂ Release rate of tagged fish higher in areas of low population ... abundance relative to the overall population M̂ M> N̂ N> High High Tag fish in proportion to the catch ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 63–72 : Autor(es): Welsford, D.C. and P.E. Ziegler

5. Joinville–D’Urville Islands (Subarea 48.1) – a former fishing ground for the spiny icefish (Chaenodraco wilsoni), at the tip of the Antarctic Peninsula – revisited

   sector has been reasonably well documented, both in terms of catch history and biological in- for mation ... GDR (1978/79 only), and a by-catch of ocellated icefi sh (Chionodraco rastrospinosus) of 350 and 390 ... tonnes respectively (CCAMLR, 1990a, 1990b). Eighty percent of the reported catch was taken by Polish ... 20% of the research vessel catch in 2002, and small numbers of icefi sh species other than C ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 1–20 : Autor(es): Kock, K.-H., L. Pshenichnov, C.D. Jones, K. Shust, K.E. Skora and Zh.A. Frolkina

6. Growth and age/length structure of populations of Notothenia (Lepidonotothen) squamifrons (Nototheniidae) in various areas of the Indian sector of the Southern Ocean

   result of intensive commercial fishing in the area. According to the catch data (Studenetskaya, 1983 ... ), the annual catch of N. squamifrons has exceeded 50 000 tonnes in some years. It is probable that this ... , 10 years on the Ob Bank and 11 years in the Kerguelen area. 5. AGE/LENGTH CATCH COMPOSITION The ... populations. Our material makes it possible to assess the age/length catch composition of N. squamifrons in ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 123–139 : Autor(es): Zaitsev, A.K.

7. Size at sexual maturity of Patagonian toothfish (Dissostichus eleginoides)

   for n 467 275 124 2 220 1 592 1 523 Confidence Limit male fish, there are only sparse ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 37–46 : Autor(es): Everson, I. and A.W. Murray

8. The use of predator-derived krill length-frequency distributions to calculate krill target strength

   practicable to limit the comparison of prey availability and predator performance over equivalent temporal ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 155–163 : Autor(es): Reid, K. and A.S. Brierley

9. Hook selectivity in the longline fishery of Dissostichus eleginoides (Nototheniidae) off the Chilean coast

   bait. For comparison all data were expressed in CPUE units defined as g/hook in each catch ... method as SRL (1987). 4. CATCH EFFICIENCY OF STRAIGHT AND CIRCLE HOOKS Catch efficiency of straight ... combined). The comparison of all data showed that catch efficiency of circle hooks was significantly ... samples are significantly different in their distribution. We observe that circle hooks catch bigger fish ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 107–119 : Autor(es): Moreno, C.A.

10. Assessments of the stocks of Notothenia rossii marmorata and Champsocephalus gunnari in the South Georgia area

    analyses. Although most attention is usually paid to the catch at age data input into a VPA, it is ... known) and the net recruitment rate to the stock in each year implied by the age data. The catch at ... The recruited stock in numbers follows the equations where C is the catch in numbers. t To ... convert the stock and catch by number to the stock and catch by weight, the mean weight of fish caught ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 1-21 : Autor(es): Cooke, J.G.

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