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1. Estimation of effective sample size for catch-at-age and catch-at-length data using simulated data from the Dirichlet-multinomial distribution

   year is important for such assessments, and this issue is studied using simulation. Between-haul ... heterogeneity within fishing year was simulated using samples from the Dirichlet-multinomial (D-M) distribution ... using aggregate year-level frequencies. The other three estimators use the haul-level frequencies ... on the new CV model; and (iii) that based on the PMLE. The year-level method gave very inaccurate estimates ... obtained from the integer values of year, y, so that for a 20-year simulation period y’ = y – 10 ... model A simulation model consisted of simulating 100 replications of a series of 20 fishing years ... from simu- lated sampling of the population age structure. For each of the 20 years in a replicate ... . For simulation Model 3, the selec- tivity parameter λ was varied linearly from 5.88 for the first year of the 20 ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 115–138 : Author(s): Candy, S.G

2. Performance and geometry of the FP-120 trawl used during UK fish stock assessment surveys around South Georgia, Subarea 48.3

   trawls have been used for over 20 years to make fishery-independent estimates of the stock sizes ... the first three stations (17, 20 and 21) were logged every 30 seconds and the fourth (22) every 20 seconds ... , that times on the bridge were only recorded to the nearest minute. 20 25 30 35 40 45 50 Station Figure ... C O ~ J ~ ~ H ~ H H ~ I M OpOneBCTBOM B 1993194 r. npeAJIo~eHb1 YpaBHeHHX PerpeCCllll An% OQeHKll rOpll30HTaJIbHOAO PaCKPbITRSI ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 51–69 : Author(s): Pilling, G. and G. Parkes

3. A von Bertalanffy growth model for toothfish at Heard Island fitted to length-at-age data and compared to observed growth from mark–recapture studies

   parameters. A young-age adjustment (less than 5 years old) to the VB model is also given in order to give ... obtained using IWLS-estimated parameters. A young-age adjustment (less than 5 years old) to the VB model ... than 20 years in age. This is due to the combined effect of natural and fi shing mor- tality ... for ages in the 8– 20 year range. This translated to larger predictions for the MLPLB-fi tted curve ... with those obtained using IWLS-estimated parameters. A young-age adjustment (less than 5 years old ... before 20 days at liberty. The median value of days-at-liberty was 163. Only mark–recapture length ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 43–66 : Author(s): Candy, S.G., A.J. Constable, T. Lamb and R. Williams

4. The status of krill (Euphausia superba DANA) resources in CCAMLR Statistical Divisions 58.4.2 and 58.4.3 from 1988 to 1990. Results of acoustic surveys

   and 1987 year-classes and with a diminished rate of emigration of krill of these year-classes from the area ... with the abundant 1986 and 1987 year-classes and with a diminished rate of emigration of krill of these year-classes ... to 1990. (Sampling by Isaacs-Kidd trawl). Year Length Class (mm) ~30.0 30.1 to 38. 0 38.1 to 46.0 46.1 ... in krill biomass observed in the area in 1990 is linked with the abundant 1986 and 1987 year-classes ... and with a diminished rate of emigration of krill of these year-classes from the area in 1989/1990. Resume Depuis ... coastal waters of the area (south of 65°30'S). Until 1988 krill biomass was determined by a technique ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 163–173 : Author(s): Bibik, V.A. and V.N. Yakovlev

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

   . The basic principles for defi ning a unit are most easily explored in terms of the structure of animal ... populations. A group of animals that are continuously distributed throughout a favourable habitat is called ... separate small-scale areas if the vector of transport is relatively predictable from one year to another ... information. The potential overlap between the fi shery and predators throughout a year may alter ...

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

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

   in years of poor krill availability. Thus natural  ortality of C. gunnari may, in some years, increase ... with increased consumption of C. gunnari by Antarctic fur seals in years of poor krill availability. Thus natural ...   ortality of C. gunnari may, in some years, increase by a large factor (assumed here ... , to 4 million animals. Fur seal consumption of C. gunnari in both good and poor krill years is well documented ... in years of high fur seal predation, depending on the size of animals in the fur seal and C. gtinnari ... spawning stock biomass dropped below 20% of the median B, level during the 10-year projection period ... rates. These may be associated with increased consumption of C. gunnari by Antarctic fur seals in years ...

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

7. Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea, Antarctica

   340–360 mm total length (TL) and about 3–4 years of age, and that 95% were mature at about 370–400 mm ... TL and 6–8 years of age. Counts of growth zones in sectioned otoliths were used to determine ages ... a significantly larger mean asymptotic maximum size than males. Maximum ages of 8 and 11 years were obtained ... ;360 mm total length (TL) and about 3–4 years of age, and that 95% were mature at about 370&ndash ... ) and about 3–4 years of age, and that 95% were mature at about 370–400 mm TL and 6–8 years of age. Counts ... maximum size than males. Maximum ages of 8 and 11 years were obtained for male and female fish ... from most of the calendar year were therefore lacking, so it was not possible to investigate ... and 3–4 years of age, while 95% are mature at 370–400 mm TL and 6–8 years of age. Females appear to mature ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 139–165 : Author(s): Sutton, C.P., M.J. Manning, D.W. Stevens and P.M. Marriott

8. Australian research on Antarctic bird and seal diets

   Heard and Macquarie Islands have been collected during the last seven years. Published and unpublished ... -Antarctic Heard and Macquarie Islands have been collected during the last seven years. Published ... 20 -5 7 21-34 40.63±7.85 27 .36±1 .83 Location: Davis Station (68°30'S: 77°50'E) Ti me ... ): Overall Prehatch Posthatch Posthatch (1984) (1985) E. crystal/orophias 12.10 6.20 18.00 13.30 ... E. superba 42.60 5.20 76.90 66.30 Fish 4.15 3.60 4.70 20.00 Amphipods 29.15 58.20 0.10 0.50 Others 13.60 ... ) 20 38 3' 1 58 400 39 29 32 o Location: Sea ice off Davis Station (68°30'S: 77°50 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 231-249 : Author(s): Williams, R.

9. Midwater trawl catchability as an aspect of a quantitative assessment of krill biomass conducted using a trawl census survey

   swann depth (metres) 42 29 41 24 29 25 30 21 cr, swann depth 13 20 13 8 10 14 16 8 Mean swann ... 47 59 30 23 20 29 17 cr, mean swann length (metres) 15 16 19 7 10 7 20 4 Swann density field ... Ha npHMepe TpaJIa AH3eKCa-KH,l(,l(a nOKa3aJI, qTO nOCJIe,l(HHe Heu,eJIeco06pa3HO HCnOJIb30 ... of 20 mm twine. This protects the trawl bag from mechanical damage. Features of this particular trawl ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 257–272 : Author(s): Kasatkina, S.M.

10. Vertical migrations of mackerel icefish (Champsocephalus gunnari) on the South Georgia shelf

    for commercial concentrations of C. gunnari in years of high abundance of the species (1982/83, 1983/84 and 1986 ... for clarification of survey techniques used in stock assessment. For a number of years scientists of AtlantNIRO have ... from research vessels which had been fishing for commercial concentrations of C. gunnari in years ... . For a number of years scientists of AtlantNIRO have been conducting trawl surveys for C. gunnari during ... from research vessels which had been fishing for commercial concentrations of C. gunnari in years ... used in stock assessment. For a number of years scientists of AtlantNIRO have been conducting trawl ... HCnOJib30BaHbl ,l{aHHbie Hayl.IHO-HCCJie,l(OBaTeJibCKHX cy ,l(OB, o6JiaBJIHBaBIIIHX npOMbiCJIOBbie CKOnJieHH51 ... H MHrpHpyeT B TOJIIIlY BO,l(bl, ,l(OCTHf'a51 10pH30HTOB 50-60 M. liHK nHTaHH51 npHXO,l(HJIC51 Ha HOl.IHbie ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 3–14 : Author(s): Frolkina, J.A. and V.I. Shlibanov

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