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1. Age determination of Notothenia gibberifrons from the South Shetland Islands, Antarctic Peninsula subarea (Subarea 48.1)

   those in the same age group around South Georgia. Likewise, our values are lower than the ones reported ... scale readings gave a result of one year more. This could arise from the difficulty in differentiating ... in 19 Potter Cove specimens. In some cases scale readings gave a result of one year more. This could ... Paper Title:  Age determination of Notothenia gibberifrons from the South Shetland Islands ... indicated one extra year. This finding is discussed below. Table 2 shows the observed age-length ... Abstract Age determination was carried out on Notothenia gibberifrons specimens collected at two ... compared in 19 Potter Cove specimens. In some cases scale readings gave a result of one year more ... years, respectively. Comparison of mean length at certain age groups suggested similarity in growth ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 143-160 : Author(s): Barrera-Oro, E.

2. An index of per capita recruitment

   recruitment (PCR) is proposed such that where R 1 is the proportion of age-l animals sampled in year ... that: (i) post-recruit mortality does not vary over age or between years; (ii) 100% of age-l animals spawn; (iii ... to recruits per spawner when mortality is constant over all ages and years, and when all age-l animals spawn ... years; (ii) 100% of age-l animals spawn; (iii) a representative sample of the population is available ... to spend one to two years in the juvenile and sub- adult stages and may not spawn until age 2 or age ... spawn and to 0.200 if uniform with lower values more common than no age-2 animals spawn. higher ones ... is the proportion of age-l animals sampled in year y and M is the post-recruit mortality rate. The intent ... or between years; (ii) 100% of age-l animals spawn; (iii) a representative sample of the population ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 179–196 : Author(s): Hewitt, R

3. Some comments on the procedure for testing estimators of krill abundance which utilise survey data

   on the distributions from surveys. ‘Two-level’ models of krill distribution are considered. These achieve overall ... concentrations; these concentrations are then located at random within the survey area. These ‘two-level’ models ... patterns, which are compatible with existing information on the distributions from surveys. ‘Two ... ; these concentrations are then located at random within the survey area. These ‘two-level’ models provide ... is that the data are collected along one-dimensional transects, whereas it is a two-dimensional structure which ... ). One simple approach to generating spatially correlated data is to use a two stage process. Thus ... survey design by a systematic one would be a satisfactory procedure in most circumstances ... correlation effects need to be introduced, this exercise becomes distinctly non-trivial. Ideally one would ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 191–205 : Author(s): Butterworth, D.S., D.L. Borchers and D.G.M. Miller

4. Population genetic structure of Patagonian toothfish in the West Indian Ocean sector of the Southern Ocean

   (n = 2) Islands were typed using two fragments of mitochondrial DNA (mtDNA) and seven nuclear microsatellite loci ... using two fragments of mitochondrial DNA (mtDNA) and seven nuclear microsatellite loci. MtDNA haplotype ... D. eleginoides (albeit rarely) are capable of wide movements across deep waters from one fi shery to another ... per locus per collection ranged from one (locus To5) to 21 (locus cmrDe9). After sequential ... on FST values across the seven loci produced only one signifi cant comparison between Crozet and PEMI2 ... was between HIMI and Kerguelen collections of D. eleginoides, while one of the largest values was between ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 21–32 : Author(s): Appleyard, S.A., R. Williams and R.D. Ward

5. Krill fishing in the Scotia Sea in relation to bathymetry, including the detailed distribution around South Georgia

   in the following two seasons. In 1994 the fishery was almost totally based over a large shallow bank area ... to the ecology of krill and the fishery's interaction with local predator colonies. File:  01murphy-etal.pdf ... to an area on the western edge of the shelf break where negligible fishing occurred in the following two ... of 1993/94 (Brierley and Watkins, 1996). Thus, years of low krill availability may be the ones in which ... greater than 4 tonnes have been reported in a CCAMLR reporting quarter of the year on at least one ... made in a CCAMLR reporting quarter of the year on at least one occasion (shaded areas) or on more than ... of an organism occurs over a spatial scale larger than one that can be easily resolved by one-off discrete ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 1–17 : Author(s): Murphy, E.J., P.N. Trathan, I. Everson, G. Parkes and F.H.J. Daunt

6. Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined with various codends

   of 80 mm, currently used on factory trawlers, as well as codends with a structure resembling tape ... further research. It should first of all cover twine codends with a mesh size of 80 mm, currently used ... are similar, consisting of two sections: the initial one characterizes the selectivity for fish ... proprietes de selectivite des deux culs de chalut a rubans plats etaient bien meilleures. L'on a constate ... . Bblno HaHAeHO, 'ITO OnTHMan bHblH pa3Mep H'IeH TaKOrO KYTKa npH CeJleKl{HH neAHHOH phl6hl H 3eneHOH ... , technical and legal point of view. One of the effective methods of regulating catch may ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 1-48 : Author(s): Zaucha, J.

7. 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 ... , would preclude the fishery's ever opening. Several possible modifications to the decision rules ... 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 ... depleted for one or two years. This behaviour is a direct result of the high levels of variability ... present - years in plus class in initial age structure Number of increments per year Mean annual ... ). For the krill-scarce years 1978 and 1984 there are no survey estimates from which one could derive estimates ... , in only one-third of these was the spawning stock level less than 20% of the median level at the end ...

   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

8. Homogeneity of Adélie penguins as krill samplers

   random samples of a patchy target population is statistically complex. One of the problems ... of penguins due to factors like sex, age, weight, etc. REFERENCES BLISS, C.J. 1967. Statistics in Biology ... 41.60 32.16 2 66 23/1/90 40.48 26.84 2 70 31/1/90 43.79 20.32 3 19 09/1/90 39.07 13.19 3 27 31/1/90 ... 39.98 27.10 4 30 09/1/90 42.65 14.75 4 25 19/1/90 32.11 31.78 5 41 18/1/90 40.02 15.18 5 39 24 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 253–257 : Author(s): Marschoff, E. and B. Gonzalez

9. Indices of prey availability near the Seal Island CEMP site: 1990 to 1996

   prey density, depth, distance from Seal Island, and persistence over time. Acoustic data from two AMLR ... surveys each year were subsampled to include the foraging range of predators breeding at Seal Island ... biomass of juvenile krill near Seal Island during the first survey of each year as compared to the biomass ... of post-spawning adults near Seal Island during the second survey of each year. It is hoped ... MATERIALS AND METHODS One of the long-range goals of the CCAMLR Ecosystem Monitoring Program (CEMP ... Seal Island, and persistence over time. Acoustic data from two AMLR surveys each year were subsampled ... (Figures 3 and 4). Two surveys were selected for each year, details of which are listed in Table ... of juvenile krill near Seal Island during the first survey of each year as compared to the biomass of post ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 37–45 : Author(s): Hewitt, R.P., G. Watters and D.A. Demer

10. The utilization of seabird censuses for krill monitoring

    distributed variables and not defined if one or more of the matrices is singular, thus precluding ... the inclusion of variates not observed in one of the data subsets. Profile Analysis Given a set of groups ... of one of the groups as the values of the mean vector of the group. This technique, fully detailed ... transformation or a related one. These plots also show that if non-normality actually exists it is not very ... databases, calling for international cooperation on the subject. File:  16-Marschoff-et-al.pdf ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 393-425 : Author(s): Marschoff, E.R., J.G. Visbeek and L.R. Fontana

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