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1. Notothenia (P.) guntheri stock status and TAC estimation in the area of Shag Rocks (Subarea 48.3)

   (Subarea 48.3) Abstract / Description:  Data on age composition of catches and fishing efforts for 1979/80 ... . guntheri abundance was estimated as 227 thousand tonnes (using all the above mentioned methods). For 1986 ... commercially taken age groups (2-4 years); (b) Fishing intensity in the predicted period is at the level of ... 160 thousand tonnes when the Gamma method was used (actual values of first and second age groups ... on age composition of catches and fishing efforts for 1979/80-1987/88 were used to analyse N ... biomass by years (thousand tonnes). Stock status and TAG prediction, if F is an average value for the ... age groups (2-4 years); ( b) Fishing intensity in the predicted period is at the level of 1987/88 ... individuals of different age, in different years. Age composition of catches (specimens). Fishing ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 53-68 : Autor(es): Shust, K. and R. Borodin

2. Low genetic diversity in the Antarctic toothfish (Dissostichus mawsoni) observed with mitochondrial and intron DNA markers

   performed in 20 μl volumes for a minimum of 4 h, following the manufacturer’s recommendations (New England ... CCAMLR, and the main fi shery for this species has taken place in Subareas 88.1 and to a lesser extent ... , 1984; Williams et al., 1994), but DNA analyses showed evidence for two genetic units, one around ... Plateau were fi xed, or almost fi xed, for a haplotype that was absent in samples from the Atlantic and ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 43–51 : Autor(es): Smith, P.J. and P.M. Gaffney

3. Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions 58.4.1 and 58.4.2)

   with the Ross Sea, where an analytical assessment has been possible for several years, and through ... . An experiment run from 2005 to 2008 required the tagging of toothfish as a prerequisite for ... 58.4.1 and 58.4.2) Abstract / Description:  Exploratory fisheries for Dissostichus spp. have been ... operating off the coast of East Antarctica (30°E–150°E; FAO/CCAMLR Divisions 58.4.1 and 58.4.2) since 2003 ... 58.4.2. Fishing years extend from 1 December of the previous year to 30 November of the named year ... for several years, and through analysis of local depletion events. Results indicated SSRU vulnerable ... there is a pro- ductive exploratory fishery for Antarctic toothfish (Dissostichus mawsoni) which has ... an attempt to reproduce the successful tagging pro- gram in the Ross Sea which is key to the ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 71–100 : Autor(es): Agnew, D.J., C. Edwards, R. Hillary, R. Mitchell and L.J. López Abellán

4. Investigation of bias in the mark–recapture estimate of toothfish population size at South Georgia

   an average movement rate downwards when fish entered a high-density box (as indicated by high CPUE ... allows simulation of releases by box over multiple years. The model performed as expected with test ... situations. It produced a near-perfect estimate of stock size when there was an ideal distribution of tags ... indicated that the Petersen estimator produced an underestimate of true population size. Although this paper ... 10 20 30 40 50 60 70 80 90 0 50000 100000 150000 200000 250000 est. population (n) pr oj ... 40 20 0 90 80 70 60 50 40 30 20 10 0 0 50000 100000 150000 200000 250000 ... correctly capture movement reversals – where an animal moves west one year and back east the next, for ... of toothfish typically move only 20–30 km each year (Marlow et al., 2003). This paper investigates ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 47–63 : Autor(es): Agnew, D.J., G.P. Kirkwood, J. Pearce and J. Clark

5. Estimating optimal observer coverage in the Antarctic krill fishery

   vessels sampled each season, 20% of total season hauls sampled for krill and an equivalent or higher ... on board for about 30% of that season. They have achieved a rate of krill sampling equivalent to 18 ... is proposed that an efficient sampling proportion, at least for South Georgia, should be >50% of ... . The South Georgia data suggest that such strategies should be pursued for at least four years before ... , should be >50% of vessels sampled each season, 20% of total season hauls sampled for krill and an ... ). For the larval fish by-catch rate, an aver- age of 95% of observed trawls per vessel were sam- pled in ... 32 Fo ro s 20 02 25 0 90 72 80 28 29 39 11 N iit ak a M ar u 20 ... op O ce an 20 03 37 1 27 1 86 32 77 23 90 21 N iit ak a M ar u 20 ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 139–154 : Autor(es): Agnew, D.J., P. Grove, T. Peatman, R. Burn and C.T.T. Edwards

6. Discrimination of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) using otolith morphometrics

   the abundance of toothfish reduces. In order to improve information on the spatial distribution, age ... identified 90% of otoliths to species and could be applied to otoliths removed from toothfish stomachs to ... and age from otolith parameters are also presented. File:  Pinkerton et al.pdf ... 80 60 40 20 0 10 20 30 40 50 60 70 Age (years ... 80 60 40 20 30 40 50 60 70 80 90 TL (cm ... 100 0 30 40 50 60 70 80 90 (c) TL (cm) R ou ... of fish age (years). ot o_ w ei gh t ( m m 2 ) 400 300 200 100 0 0 10 20 ...

   Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 15–28 : Autor(es): Pinkerton, M.H., C. Ó Maolagáin, J. Forman and P. Marriott

7. Distribution and relative abundance of Antarctic toothfish (Dissostichus mawsoni) on the Ross Sea shelf

   , with some evidence for an ontogenetic migration from east to west as they grow. From the fisheries data ... available, there is no evidence for a northward contraction in the range of D. mawsoni over the course of ... modes at 80 cm and 100–115 cm in each of the three years. For com- parison, the size distribution of ... for all years up to, and includ- ing, the 2007/08 fishing year. The observer data used in this report ... 88.2 for all years up to, and including, the 2007/08 fishing year. Data error checking and grooming ... caught in each of the three grounds, for years where more than 10 sets were completed, is shown by year ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 33–51 : Autor(es): Hanchet, S.M., S. Mormede and A. Dunn

8. The Soviet krill fishery in the Atlantic Sector of the Antarctic from 1977 to 1991: fishing effort distribution and interannual patterns

   from 1977 to 1991 was 50 086 vessel-days fished, in Subareas 48.3 (45% of the total for the period ... observers and may differ from fi shery statistics offi cially published in the USSR. For a comparative ... 99 8 28 2 57 1 19 78 14 2 80 3 89 9 23 11 6 63 7 89 8 20 1 89 0 19 ... 00 6 3 63 4 19 90 37 4 85 6 35 0 21 3 27 3 40 9 27 2 75 1 4 20 9 19 91 ... 7 61 15 3 20 6 0 22 80 36 17 4 21 4 88 0 70 35 1 14 6 2. 3 B ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 1–13 : Autor(es): Litvinov, F.F., V.A. Sushin, G.A. Chernega and O.A. Berezhinsky

9. Estimating krill recruitment and its variability

   rate for 1+ krill (the ratio of the number of krill aged one year to the number of krill aged one year ... for 2+ krill (the ratio of the number of two-year-old krill to the number aged two and above) from ... likelihood method is developed for the decomposition of krill density-at-length data into the proportion of ... and above) of 0.339 with a standard deviation (SD) of 0.100. The corresponding result for recruitment ... in those years, or the survey results are not representative for this age class. If the former is ... Estimating Krill Recruitment and its Variability 20 30 40 50 60 Length (mm) 100 90 Nella Dan: ADBEX I ... o 80 8 70 * 60 .$ : 5 30 D 20 10 0 Figure 7: The fit of mixture distributions to ... with R(t) estimated for both putative one- and two-year-old age classes. above data, and four age ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 55–69 : Autor(es): de la Mare, W.K

10. Analysis of variability of krill size and fish by-catch in the Japanese krill fishery based on scientific observer data

    parameters estimated by the Markov chain Monte Carlo (MCMC) method hardly show difference among years ... Bayesian model. For both krill length and by-catch fish number, vessel sample size shows marked effects on ... the coefficient of variation (CV), although haul sample size affects CV for only krill length data up ... commercial vessels provides important information for the management of krill resources and the Antarctic ... th (m m ) 60 50 40 30 20 (a) Adult size in Subarea 48.1 Overall trend Year E st im at ... Year E st im at ed m ea n le ng th (m m ) 60 50 40 30 20 (c) Adult size in Subarea ... 40 30 20 (e) Year Area Y–A Ves. Cruise Haul Ind. Va ria ... deploying an observer but also of the time budget for the observer because scientific observers are ...

    Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 31–47 : Autor(es): Okuda, T. and M. Kiyota

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