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1. 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 ... from 1, and for the restricted range of lengths-at-release, given earlier results, any dis- crepancy ... that the marginal length-bin frequencies for the length-at- age sample are realisations from a multinomial dis ... parameters. If there is an early-age (i.e. below age 5) phase of growth which is different from a later-age ... with those obtained using IWLS-estimated parameters. A young-age adjustment (less than 5 years old ...

   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

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

   , there is a 20-year time series of data on the repro- ductive performance of krill-dependent predators ... krill availability measured later in the breeding season may not appear anomalously low. Given ... seals are present at South Georgia throughout the year, and samples of krill collected from ... of the split year, i.e. 1993/94 = 1994) from carapaces in scat samples collected during the lactation period ... from land-based predators directly with automated on-board data collection systems it will be possible ...

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

3. Quantifying movement behaviour of vessels in the Antarctic krill fishery

   / Description:  Ten years of recent fine-scale haul-by-haul krill data were used to characterise the behaviour ... for high-quality year-round data on all vessels participating in the krill fishery to assist ... Ten years of recent fine-scale haul-by-haul krill data were used to characterise the behaviour ... for high-quality year-round data on all vessels participating in the krill fishery to assist ... in dis- tances between hauls when catch levels fell below 10 tonnes was clearly retained for Japan when ... The statements above by Butterworth (1988a) seem to be supported from the analysis of dis- tances between hauls ... Kingston, Tasmania 7050 Australia Email – so.kawaguchi@aad.gov.au Abstract Ten years of recent fine ... are proposed based on the results from this study. These analyses demonstrate the need for high-quality year ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 131–148 : Author(s): Kawaguchi, S. and S.G. Candy

4. Estimating optimal observer coverage in the Antarctic krill fishery

   suggest that such strategies should be pursued for at least four years before the Scientific Committee ... suggest that such strategies should be pursued for at least four years before the Scientific Committee ... for at least four years before the Scientific Committee will have sufficient data to determine appropriate ... observer coverage in the Antarctic krill fishery introduction In recent years, the fishing industry has ... in each year since 2002. This dataset was chosen to examine the observer data that have been reported ... and the fish larval by-catch rate. Second, to determine how many years of data collected under a partial ...

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

5. Changes in the fish biomass around Elephant Island (Subarea 48.1) from 1976 to 1996

   from 1978/79 to 1988/89, with most of the commercial harvesting taking place in the first two years ... /89, with most of the commercial harvesting taking place in the first two years of the fishery ... , y a las di f icul tades experimentadas a1 intentar la ordenacion d e pesquerias que explotan conjuntos ... during the 1981 survey. They were still present in similar numbers two years later (Figure ... , with most of the commercial harvesting taking place in the first two years of the fishery. Results ... of the harvesting occurring in the first two years of the fishery (reviews in Kock, 1991,1992; Agnew and Nicol ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 165–189 : Author(s): Kock, K.-H

6. Selectivity of standard Polish commercial trawl codends on Antarctic fishing grounds

   fishery were conducted in 1950-1980. Cieglewicz and Strzyzewski (1960) studies the mechanism ... . In the 1960's and 1970's extensive investigations of selectivity, directed by Strzyzewski (1971) covered ... on the outside from the top down to the middle of its height with a cover having relatively small meshes (mesh ... from the codend only from the part equipped with the cover. They were later trapped in the end parts ... commercial fishery, with a nominal mesh size A = 80 mm and A = 100 mm, made of double twines with a thickness ... sufficiently good level seems possible as a result of the application of webbing with permanently open meshes ... for codend construction. The most difficult matter will be preparing a codend with proper selectivity ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 107-142 : Author(s): Zaucha, J.

7. Krill population biology during the 1991 Chilean Antarctic krill fishery

   males et de femelles dIE. superba de la zone A. Distribution de frequences de tailles du total des ... tailles de juveniles, de males et de femelles dIE. superba de la zone B. Distribution de frequences de ... B. Distribution de frequences de tailles dIE. superba de jour, en periode de demi- jour et de nuit. Sex ratio ... dIE. superba pendant les trois periodes. Capture totale (tonnes/mille) dans les deux zones pendant ... size from 1.5 to 3 cm). Two subsamples of 100 specimens each were taken from 50 samples and analysed ... and 55 mm TL, with a mean TL of 45 mm for females and 48 mm for males. A very weak mode for juvenile ... % juveniles. Of the females sampled, 25.2% bore spermatophores. Although the smallest specimen found with a ... spermatophore had a 36.5 mm TL, 80% of the females with spermatophores had a TL larger than 45 mm. In Area B, a ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 223–235 : Author(s): Mujica R., A., E. Acuña S. and A. Rivera O.

8. Movement and growth of tagged Dissostichus eleginoides around South Georgia and Shag Rocks (Subarea 48.3)

   groundfish surveys and CCAMLR observer trips. This includes about 900 that have been injected with either ... pot fishing in 2000 and 2001, and have been at liberty from one to two years. Four fish were tagged ... tags have been recovered from a high seas area on the Patagonian Shelf at 42°S after about one year ... . Approximately 2 260 toothfish have been tagged and released during groundfish surveys and CCAMLR observer trips ... groundfi sh surveys and CCAMLR observer trips. This includes about 900 that have been injected ... and released during experimental pot fi shing in 2000 and 2001, and have been at liberty from one to two years ... on the Patagonian Shelf at 42°S after about one year at liberty from some opportunistic tagging carried out ... fi shing vessels by other observers in this year (Figure 1). One vessel that left the South ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 101–111 : Author(s): Marlow, T.R., D.J. Agnew, M.G. Purves and I. Everson

9. Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3

   CPUE Simulation Study. Annual TACs are restricted to an initial ceiling (C c) for a five year period ... by C r % per annum. However, this increase may be suspended or reversed in any year, depending on how many ... of the previous three years' CPUE values fall below a target level of 0.75 CPUE ref. An operating model ... of krill over a 20-year harvesting period from falling below 60% of its average unexploited level; subject ... . Annual TACs are restricted to an initial ceiling (Cc) for a five year period, with a reference CPUE ... % per annum. However, this increase may be suspended or reversed in any year, depending on how many ... of the previous three years' CPUE values fall below a target level of 0.75 CPUEref• An operating model of krill ... of krill over a 20-year harvesting period from falling below 60% of its average unexploited level; subject ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 189–219 : Author(s): Butterworth, D.S.

10. Possible effects of different levels of krill fishing on predators – some initial modelling attempts

    level drops, the ratio of good to poor years for krill predators will decrease. The aim of subsequent ... of exploitation is indicated by K. The juvenile (first year) 'survival rate' incorporates the effects ... of (changing) pregnancy rate as well as the higher-than-average natural mortality rate early in life ... . These relationships are: 'bad' for each predator, to be interpreted respectively as follow: years in which both ... fluctuations together with preliminary information on adult survival and breeding success patterns for certain ...

    Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Author(s): Butterworth, D.S. and R.B. Thomson

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