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1. Otolith microstructure of juvenile mackerel icefish (Champsocephalus gunnari) (Channichthyidae) in the South Georgia area

   and daily otolith increments could be used for age differentiation of juvenile fish between consecutive year ... found between fish length and daily otolith increments could be used for age differentiation of juvenile ... ;March 2002 on the South Georgia shelf. Juvenile fish comprised two year classes arising from spawning ... a trawl survey of juveniles in February–March 2002 on the South Georgia shelf. Juvenile fish comprised two ... for age–growth analyses. One otolith of each pair was immersed in an alcohol–water solution ... in Figures 1, 2 and 3. For age-reading purposes, the Antarctic split- year system was used, in which ... fi rst-year fi sh 5.5–10.4 cm in length at the age of 120–250 days. The length range of fi sh ... found between fi sh length and daily otolith increments could be used for age differentiation ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 173–181 : Author(s): Shcherbich, L.V

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

   40 30 20 10 0 f 0 1 2 3 4 5 6 7 Catch (tonnes) of C. gunnarl One haul not included ... will consist of one representative bottom trawl with the net fishing for 30 minutes on the bottom. The net ... grands traits dans l'analyse. Pe310Me HaCT05III(uti OTtleT onUCblBaeT 06cY)I{,zteHue U aHaJIU3 ... YJIOBOB BbI3BaJIO HenpOnOpL\UOHaJIbHOe 3aBbIlleHue OL\eHKU 6uoMaccbI Champsocephalus gunnari ...

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

3. 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 the Elephant Island area. In the South Georgia area there were two age groups (2+ and 3+), and in the South ... of various densities (Kalinowski and Witek, 1982; Watkins et al., 1990). Sometimes the shoals in one ... during one fi ve-minute haul in the South Shetlands area in April 1998. Such a dense concentration ... . During this period, night concentrations occurred in layers closer to the surface than day ones ... shorter, therefore it must be assumed that there are factors other than daylight which have an impact on ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 83–105 : Author(s): Jackowski, E

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

   zero if the assumed value is greater than the “true” one. File:  04-Gasyukov-and-Dorovskikh.pdf ... is greater than the “true” one. ... Na,y rates by age and fishing year, where terminal fishing mortality rates and fishing mortality ... rates for the oldest age group by fishing year are estimated by the tuning algorithm; (iv) mean ... ,y) a+ 1,y+ 1 - a,ye where Sa is selectivity at age a ; Fy is total fishing mortality at year y; Y = 1,2 ... initial data are required: ak - number of age groups; Yk - number of fishing years; M - natural ...

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

5. 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 ... objectives are being met to be assessed. The advantages of using a feedback method of regulation ... not be representative of a population as a whole because of tendencies for animals to segregate by size, age ... qeCTBOM, KOTOPbIM ,l(OJI~HbI 06JIa,l(aT b ,l(OnOnHHTeJIbHbIe I.{eJIH, .l1Bn.l1eTC.l1 TO, qTO' OHH Bblpa ... such as that of Beverton and Holt (1956) is to predict optimum levels of fishing mortality and age at first fishing ... from estimates of growth curves and age-structure of an exploited fish stock. This method falls ...

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

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

   . Residual variances indicated one reader was relatively more precise than the other in estimating age using ... experience of the two readers in estimating the age of D. eleginoides using otoliths and scales. ... Paper Title:  A comparison between otoliths and scales for use in estimating the age ... of Dissostichus eleginoides from South Georgia Abstract / Description:  Age composition is fundamental ... . Residual variances indicated one reader was relatively more precise than the other in estimating age using ... ). For estimating age, the acetate slide was positioned with the impression facing upwards. One of the four ... the use of otoliths and scales in estimating tootlifish age 0 10 20 30 40 50 10 20 30 40 50 Reader ... in the commercial fishery were between 3 and 8 years. However, a validated age method using otoliths demonstrated ...

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

7. Significant conservation benefits obtained from the use of a new fishing gear in the Chilean Patagonian toothfish fishery

   whales in the season) but the difference in percent- age of catch damage was two-fold less with the use ... 1 508 500 (36.5%) were observed by one of the four scientific observers. Data recorded included ... of the new system (Figure 3). One important observation was made by sci- entific observers when the fleet ... started using the Chilean longline. After about one week of unsuc- cessful attempts by sperm whales ... modified artisanal system, which includes a net sleeve that is placed on secondary vertical lines, has ... sperm and killer whales on fish catch rate was assessed during September–December 2006. The results were ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 79–91 : Author(s): Moreno, C.A., R. Castro, L.J. Mújica and P. Reyes

8. 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 ... back to 1977. The predicted age structure, dominated in recent years by the 1987 year-class (1 year ... -class (1 year olds in 1988), was quite robust, despite the use of various combinations of survey ... proportion of 5 year olds, which was not observed during the survey on Falklands Protector in January 1992 ... for that year. The default is one times the mean of the four younger Fs (i.e., for C. gunnari age ... value (initial estimate ±99%), however, in all cases one or more of the age groups reached their limit ... . The predicted age structure, dominated in recent years by the 1987 year-class (1 year olds in 1988), was quite ... in the region of 40 to 50% of the fishable biomass (age 2+*) would be composed of 5 year olds. Accordingly, TAC ...

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

9. Champsocephalus gunnari stock status in the South Georgia area

   / Description:  ata of age composition and fishing effort for 1976/77-1987/88 were used to analyse stock status ... ata of age composition and fishing effort for 1976/77-1987/88 were used to analyse stock status ... intensity was F 0.1. In the first two cases TAC=25-30 thousand tonnes and stock size does not change ... fishing intensity was F0.1. In the first two cases TAC=25-30 thousand tonnes and stock size does ... HCnOJIb30BaHHOH B nOCJIe,llHee BpeM51 BeJIH'-IHHe 3anaca H ,lla)l{e npH HaHHH3WHX YPOBH51X nOn ... intensidad de pesca fue FO.1. En los dos primeros casos, la T AG=2S-30 mil toneladas y el tamano de la ... . T H 6bICTPbIH POCT ,lI0 OKOJIO 220 TbIC. T B ce30H 1982/83 r. 3aTeM On5.lTb pe3Koe CHH)l{eHHe ,lI0 63 TbIC ... YCJIOBH5IX (HaHMeHhWa5I l.IHCJIeHHOCTh nOnOJIHeHH5I - 400 MJIH. 3K3.) H OllY=29,2 TbIC. T B ce30H 1988/89 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 1-18 : Author(s): Borodin, R. and P. Kochkin

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

    , Notothenia gibberifrons and N. rossii marmorata. Scales and otoliths were also collected for age ... georgianus, Notothenia gibberifrons and N. rossii marmorata. Scales and otoliths were also collected for age ... stock monitoring program conducted by the Sea Fisheries Institute, Gdynia. Codends of two mesh sizes (47 ... % while N. rossii and D. eleginoides were present only as by-catch. In sampling catches two length groups ... 0 ___ I I i I I I i i I '/9f£J/86 (XII-!) n-687 2 4 6 8 Age grcups (years) 200 O~~~I~~~I~~~I==~~I==~~ 20 3J 40 50 ... 8 20 30 40 ~ Total length (cm) Length and age frequency distribution of Pseudochaenichthys ... 19f!5/86 (XII-I) n-300 2 4 6 8 10+ Age groups (years) O~~==~,==~==~,===;~~,==~==~,==~~ Figure ... Age groups {years) 0 I I I I I I 3) ~ &) 8) 70 00 Total length (cm) Figure 10 Length and age ...

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

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