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

   scale readings gave a result of one year more. This could arise from the difficulty in differentiating ... Notothenia gibberifrons specimens collected at two localities near the South Shetland Islands (Low I. and ... Paper Title:  Age determination of Notothenia gibberifrons from the South Shetland Islands ... between false and annual checks in scales. Age determination by otolith cross sections proved to be the ... ~ N 0'= 42 0 8 r ~n N~ = 53 ~ 6 4 z 2 ---- >- 14 16 18 20 22 24 26 28 30 32 34 36 38 u z t4 ... w :::> 12 ~ iO t N cf= 15 0 0::: 8 r B ~ I.L N~ = 22 6 4 2 14 16 18 20 22 24 26 28 30 ... 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. This ...

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

2. Homogeneity of Adélie penguins as krill samplers

   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 ... 19 20/1/90 39.23 14.45 11 29 29/1/90 37.93 94.74 Table 2: Nested ANOV A of krill-within-days ... random samples of a patchy target population is statistically complex. One of the problems is that ... . MATERIALS AND METHODS During summer 1989/90, 27 Ad6lie penguins from the Bahia Esperanza rookery were ...

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

3. An assessment of the merits of length and weight measurements of Antarctic krill Euphausia superba

   animal has little effect upon length-weight relationships. The use of categories of sex and maturity ... prediction. Surprisingly, the stage of the moult cycle of the animal has little effect upon length-weight ... Universitat Kiel, Dusternbrooker Weg 20, 2300 Kiel, Federal Republic of Germany. Les relations publiees des ... prediccion. Sorpendentemente, la etapa del ciclo de muda del animal tiene poco efecto sobre las ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 371-373 : Autor(es): Morris D.J., J.L. Watkins, C. Ricketts, F. Buchholz, and J. Priddle

4. An index of per capita recruitment

   assumptions that: (i) post-recruit mortality does not vary over age or between years; (ii) 100% of age-l ... years, and when all age-l animals spawn. These conclusions are insensitive to changes in the shape of ... underestimate recruits per spawner by 30% if reasonable assumptions are made regarding the variability of ... spawners and recruits. PCR was also able to track cycles in recruits per spawner after a 20% random ... appearing as a large mode at 20 to 30 mm length and in subsequent years as progressively longer length ... . Antarctic krill, however, appear to spend one to two years in the juvenile and sub- adult stages and may ... with one year of mortality removed: In addition to compounding the results of two PCRy_l ... nocne ~ 0 6 a ~ n e ~ H ~ K H C ~ O ~ ~ ~ O B ~ B U I ~ M ~ C X Rnsr pacveTa s ~ a v e ~ ~ m R1 20 ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 179–196 : Autor(es): Hewitt, R

5. 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 ... relative 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 that ... 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 1. For ... MATERIALS AND METHODS One of the long-range goals of the CCAMLR Ecosystem Monitoring Program (CEMP) is to ... and 1993) or hull-mounted at 5 m depth (1994 to 1996), were passed to a Indices of Prey ...

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

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

   comprised two year classes arising from spawning in the 1999/2000 and 2000/01 split-years. The mean width of ... 2001/02 year class lasted four months. This was estimated based on a retrospective count of daily ... increments. TL varied from 5.5 to 10.4 cm for fish in their first year (120–250 days) to 12.5–13.3 cm in 1 ... -year-old fish (477–533 days). The radius of the first annulus ranged from 0.7 to 1.3 mm. The ... the 1999/2000 (5 speci- mens) and 2000/01 (20 specimens) split-years. The 1999/2000 year class ... survey of juveniles in February–March 2002 on the South Georgia shelf. Juvenile fi sh comprised two year ... used for age–growth analyses. One otolith of each pair was immersed in an alcohol–water solution ... which the year is de- fi ned as the period from 1 July to 30 June of the next year (Shcherbich, 1975 ...

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

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

   ~70–74 cm Ø~30 cm Ø~10–15 cm ~100–120 cm Hooks Snoods ~20 cm ~15 cm ~25 cm Weight 4–8 kg ... catch damage was two-fold less with the use of the new system (Figure 3). One important observation ... why the Chilean fishery authorities began to implement the NPOA- Seabirds. Two years after the ... (Dissostichus����i�oi��s ����i�oi��s����i�oi��s) с использованием трот-ярусов. Эта модифицированная кустарная ...

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

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

   greater than zero if the assumed value is greater than the “true” one. File:  04-Gasyukov-and ... and is close in its shape to normal distribution of the values close to the "ideal" one. Two ... , -0.030] : -0.062 -0.047 [-0.177 ; 0.009] 80 , 60 ~il=:1,0 40 20 i I - 0,4 -0,3 - 0,2 - 0,1 ... Frolkina and Dorovskikh, 1990). Age composition of the catches, Ca.)!, for a series of years and ... - number of age groups; Yk - number of fishing years; M - natural mortality rate; Wa,y or Wa - mean ...

   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

9. 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 are ... quantities which can be robustly estimated, thus allowing the degree to which objectives are being met to ... risk of changes in the marine ecosystem which are not potentially reversible over two or three ... by consensus (Rule 3 of the Scientific Committee rules of procedure, and Article XII of the ... , there is difficulty of interpreting article 11 paragraphs 3b and 3c unless, following Edwards and ...

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

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

    the two readers in estimating the age of D. eleginoides using otoliths and scales. File:  05ashford ... sides. Using ANOVA, we compared data obtained from the two structures to test the hypothesis that ... using otoliths. For scales, bias occurred for both readers between readings; for otoliths, only one ... reader was biased. Residual variances indicated one reader was relatively more precise than the other in ... . Sustainable exploitation rates should have been 20-30% of that based on age determinations from scales, in ... , used to test for differences between repeated age estimatiol~s using scales and otoliths by two ... use of otoliths and scales in estimating tootlifish age 0 10 20 30 40 50 10 20 30 40 50 Reader l ... two readings. The bias for Reading 2 by Reader 1 was 0.51 years; the bias for Reading 2 by Reader 2 ...

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

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