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1. Sensitivity investigation of the SDWBA Antarctic krill target strength model to fatness, material contrast and orientation

   with noise; (ii) the actual krill shape being more complex than the jux- taposed cylinders of varying radius ... kHz were used. In addition, 70 and 333 kHz were also used; the first being suggested to be use- ful ... °] and the Lawson et al. (2006) N [0°, 27°] distributions being markedly different in mean orientation ... TS is a stochastic variable and despite the effects of its variability being fairly smoothed when ... parameters, it is important that the model should be parameterised according to the potential seasonal ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 97–122 : Author(s): Calise, L. and G. Skaret

2. The use of predator-derived krill length-frequency distributions to calculate krill target strength

   CCAMLR Science, Vol. 8 (2001): 155-163 SHORT NOTE ... from land-based predators directly with automated on-board data collection systems it will be possible ... , i.e during logistic/resupply operations. This will allow a robust estimate of krill abundance to be ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 155–163 : Author(s): Reid, K. and A.S. Brierley

3. Length- and age-at-spawning of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea

   ; Patchell, 2001; Hanchet and Horn, 2000). Male notothenioids typically have a one-year gam- ete development ... collected in 2009 or 2001 from the north, slope and shelf regions. Within the Ross Sea, sam- ple ... 1 1 2006 70 40 12 122 2007 59 3 62 2009 64 64 January 2001 8 8 2004 70 17 87 ... 4 6 10 2007 21 21 2009 37 37 March 2000 46 46 2001 2 57 59 2002 56 ... of D. mawsoni shows that once development begins, oocytes grow and accumulate at the cortical alveoli ... spawn at a younger age with an A 50% of 12.8 years (95% CI 11.9–14.0) or 120.4 cm (95% CI 114.8–126.7 ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 53–73 : Author(s): Parker, S.J. and P.J. Grimes

4. A review of data on abundance, trends in abundance, habitat use and diet of ice-breeding seals in the Southern Ocean (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   of seals around the continent to estimate the probability of seals being hauled out at any time of day ... in Feb- ruary being applied to counts of all four spe- cies across the months of January to March. More ... ., 2001; Sato et al., 2002; Hindell et al., 2002; Davis et al., 2003; Watanabe et al., 2003; Fuiman et ... important first steps for improving ecosystem models. This review focuses on seals that breed in ice ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 49–74 : Author(s): Southwell, C., J. Bengtson, M. Bester, A.S. Blix, H. Bornemann, P. Boveng and M. Cameron, J. Forcada, J. Laake, E. Nordøy, J. Plötz, T. Rogers, D. Southwell, D. Steinhage, B.S. Stewart and P. Trathan

5. Analysis of krill trawling positions north of the South Shetland Islands (Antarctic Peninsula area), 1980/81–1999/2000

   CCAMLR Scie~~ce, Vol. 8 (2001): 25-36 ANALYSIS ... . Trawling positions seemed to be primarily governed by the distribution of larger mature krill, especially ... at the beginning of fishing operations each season. In summer, biological factors that affect product ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 25–36 : Author(s): Kawaguchi, S. and K. Segawa

6. A quantified Bayesian Maximum Entropy estimate of Antarctic krill abundance across the Scotia Sea and in small-scale management units from the CCAMLR-2000 Survey

   of Area 48 (CCAMLR-2000 Survey) (Trathan et al., 2001; Hewitt et al., 2004a) of the Scotia Sea employed ... being produced is proportional to the number of permutations Ω of N krill that result ... that there is a single maximum for evidence (Gull and Skilling, 1991). This being the case, there is no need ... tonnes, with a standard deviation of 10 million tonnes. The MaxEnt method provides new insights into the ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 97–116 : Author(s): Heywood, B.G., A.S. Brierley and S.F. Gull

7. Effects of recruitment variability and natural mortality on generalised yield model projections and the CCAMLR decision rules for Antarctic krill

   (Hofmann et al., 1998; Murphy et al., 1998; Murphy and Reid, 2001; Siegel et al., 2003; Tarling et al ... based on maximum age. Murphy and Reid (2001) suggested that a value of 1.25 produced the best match ... produced populations with a 0.628 probability of being above 20% of unfished spawn- ing biomass. Peatman ... 0.462 1999 0.022 n/a 0.168 0.042 2000 n/a n/a n/a n/a 2001 0.106 n/a 0.641 0.002 2002 0.458 0.935 ... (Euphausia superba) fishery. The current precautionary catch limit was based on supplying the GYM with a ... krill around the Antarctic Peninsula (Subarea 48.1) along with increasing rates of natural mortality ... the annual size distributions of krill in penguin diets. Simulations with either no fishing, or with ... in krill harvests in Area 48 beyond the trigger level require verification that the krill recruitment ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 81–96 : Author(s): Kinzey, D., G. Watters and C.S. Reiss

8. A declining trend in the abundance of Notothenia rossii marmorata and Notothenia gibberifrons observed in fjords in two sites in the South Shetland Islands

   1985 April 5 5,11,8,14,24 0,1,3,7,3 1,8,16,1,3 May 5 10,14,28,7 0,6,3,4,2 11,13,3,15 31 13 August ... as significant. The material for the current study was obtained with trammel nets at Potter Cove ... species in relation to Notothenia neglecta, a species with similar ecological habits in the fjords. Since ... neighbouring sites in the South Shetland Islands. This phenomenon might be explained as a consequence of the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 263–274 : Author(s): Barrera-Oro, E. and E. Marschoff

9. A functional division of Electrona carlsbergi (Tåning, 1932) area of habitat in relation to the latitudinal zonation of the Southern Ocean

   in the Southern Atlantic along two meridional transects at 17° and 20°W in the latitudes from 37°30' to 55°30 ... 'S. The survey was mainly focussed on studies of distribution of adult and pre-spawning Electrona ... and Subtropical Frontal Zone. The centre of the species' area of habitat is in the Sub-Antarctic Zone because ... of the Myctophidae family were taken in the course of trawling. E. carlsbergi was the most common species, being ... to north with the maximum variation in length being in the SAZ and the maximum length of adult specimens ... being analysed (see Figure 8). Representative hauls are represented on the horizontal axis, however ... %). For specimens over 8.0 cm the sex ratio is almost equivalent with females being slightly dominant (53 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 369–395 : Author(s): Zemsky, A.V. and S.A. Zozulya

10. Fishing for toothfish using pots: results of trials undertaken around South Georgia, March–May 2000

    CCAMLR Scier~ce, Vol. 8 (2001): 93-105 FISHING ... /day (green weight) being reported. Such a method has the potential to reduce, or eliminate, bird ... i~x~ilniis) 2 32 resulted from iso/amphipods attacking fish, or fish being confined in a small area ... with a stronger hauler, with stronger gear to attach pots to the longline to prevent pots being lost. Shorter ... toothfish was notably lower than that achieved in the longline fishery. Importantly, the use of pots ...

    Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 93–105 : Author(s): Agnew, D.J., T.M. Daw, G.M. Pilling and M.G. Purves

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