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1. 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 vessel in international waters at that latitude in 2001. File:  07marlow-etal.pdf ... strontium chloride or oxytetracycline that places a permanent chemical marker on the otolith indicating the ... experimental pot fishing in 2000 and 2001, and have been at liberty from one to two years. Four fish were ... groundfi sh surveys and CCAMLR observer trips. This includes about 900 that have been injected with ... tagging carried out on a toothfi sh pot vessel in international waters at that latitude in 2001. Résumé ... also from deep water. In 2002, however, an observer noted that there appeared to be no rela- tionship ... . Comparisons of the size and date at release with that at recapture, and age estimates from otoliths, allow ...

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

2. The sensitivity of multiple output statistics to input parameters in a krill–predator–fishery ecosystem dynamics model

   productivity, health, resilience and services. These objectives are also consistent with CCAMLR’s con ... Subareas 48.1 and 48.2 with the movement case than with the no-movement case, indicating that modelled ... the absence of a relationship with the perturbed variable does not necessarily mean that the ... statistic is insensitive, just that sensitivity does not change with the level of perturbation. The ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 97–118 : Auteur(s): Hill, S.L. and J. Matthews

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

   suggested by the Joint Meeting of CCAMLR's Working Group on Krill (WG-Krill) and Working Group for the ... fluctuations together with preliminary information on adult survival and breeding success patterns for certain ... krill predator species. A 'one-way' interaction model is developed, in which krill abundance ... that variability in the annual recruitment of krill results in predator populations being less ... equation (1). Note that T is taken to be the same for each female predator in the population. For seals ... . (It must be stressed that the estimates given in CCAMLR (1993) are preliminary, and do not ... to natural mortality. In setting an upper bound for S?, account must be taken of the fact that ... - paragraphs 7.17 to 7.20). Another is that the estimate for the Addie penguin is known to be negatively ...

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

4. Using ecosystem monitoring data to detect impacts

   using monitoring data with no control sites. These methods assess either (i) the expected probability of ... indication from the onset. Furthermore, simulation of all methods suggests that the total probability of ... error (false positives and false negatives combined) is lowest with fixed reference point methods. The ... probabilities of Type I and Type II error can be evaluated analytically for these methods, which facilitates ... could be integrated into the manage- ment of krill fisheries (Constable, 2001, 2002), for example by ... have assumed that such objec- tives would be defined in terms of population size reference points ... of detrimental delays in the management response associated with methods that take a long time to ... insight can be gained by estab- lishing P(s ≥ so), the expected probability that the number of ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 197–212 : Auteur(s): Hill, S.L., J. Forcada, P.N. Trathan and C.M. Waluda

5. An integrated stock assessment for the Patagonian toothfish (Dissostichus eleginoides) for the Heard and McDonald Islands using CASAL

   weighting were investigated using haul-level estimated effective sample sizes with, additionally ... data. A key uncertainty is the number of ages fully selected by the main survey series. With all the ... appropriate, since SLOF could not be removed to an acceptable degree. The issues concerning the effect of the ... had not been measured for length and to exclude fish that were likely not to have mixed with the ... GYM is that many parameters can be estimated simultaneously within the model, including the pre ... projections across uncertainty in parameter values uses sample sets of parameters that are consistent with ... of issues that need to be addressed in toothfish assessments, notably the age-specific spatial ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 1–34 : Auteur(s): Candy, S.G and A.J. Constable

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

   operations by Japanese fishing vessels. There were differences between statistical areas with longer ... fishery to assist in interpreting the annual fishing patterns, which can best be collected by scientific ... trawlers with regard to catch levels, and assess whether these patterns can be described generic; (ii ... need to be interpreted with cau- tion due to the small sample size of hauls outside the 2000/01–2003 ... graphi- cal presentations of actual trends with approximate 95% confidence bounds, which suggest that ... consistently low over the last decade with a slight peak of ~0.1 in the 2001/02 season. Discussion In this ...

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

7. Statistical power to detect changes in growth rates of Antarctic fur seal pups

   (60°59.5'S, 55°24.5'W), the simulations suggest that following the protocol of the Standard ... changes (between years) in pup growth rates, the loss of power associated with obtaining weight samples on ... detect a 17% change in the growth rate with a 10% chance of committing Type 1 or Type 2 errors. If only ... % under the same conditions. Slight gains in power can be obtained in some cases, without increasing the ... than four samples of pups will be weighed following this method and that possibly three or fewer ... Bengtson (1989) suggested that a and ~ (the risk of a Type 2 error) probabilities should be equal in some ... ) in pup growth rates, the loss of power associated with obtaining weight samples on only three dates ... , 55°24.5'W), the simulations suggest that following the protocol of the Standard Method (50 pups of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 399–409 : Auteur(s): Boveng, P., J.L. Bengtson and M.E. Goebel

8. Temporal variability and the interrelationships between CEMP parameters collected on Adélie penguins at Béchervaise Island

   correlation with breeding success. Results indicate that low weights of females at the time they depart after ... egg laying appears to be the fi rst indication that a season may have low breeding success. The ... results obtained throughout these analyses indicate that knowledge of the sex of birds can be important ... examined for Adélie penguins over a period of 12 years. Data were collected from 1990/91 to 2001/02 at ... laying was the fi rst indication that breeding success for that season might be low. Birds with lower ... with breeding success. Results indicate that low weights of females at the time they depart after ... egg laying appears to be the fi rst indication that a season may have low breeding success. The ... results obtained throughout these analyses indicate that knowledge of the sex of birds can be important ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 75–90 : Auteur(s): Emmerson, L.M., J. Clarke, K.R. Kerry and C. Southwell

9. Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea

   preliminary and should be used with caution. Further work is needed to determine whether the thorn ageing ... . Caudal thorns viewed with transmitted white light provided the clearest growth bands, but reading ... been validated. The maximum estimated age was 14 years, but this should be regarded as a conservative ... estimate of longevity because of the possibility that thorn growth ceases in large individuals. There was ... should be used with caution. Further work is needed to determine whether the thorn ageing technique ... (Walker and Heessen, 1996). The key biological parameter that affects skate vulnerability appears to be ... preliminary observations from the authors’ previous study (Francis and Ó Maolagáin, 2001), and suggests that ... the outliers were judged to be easy to read, with fi ve skates having readability scores of 1–2 ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 183–194 : Auteur(s): Francis, M.P. and C. Ó Maolagáin

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

    with age. Patagonian toothfish (Dissostichus eleginoides) is considered to be a long-lived species ... sides. Using ANOVA, we compared data obtained from the two structures to test the hypothesis that ... with age. Patagonian toothfish (Dissoslicliirs elcginoides) is considered to be a long-lived species ... would be the most effective (SC-CAMLR, 1998). The present study was undertaken in response to that ... as year 0. The birthday of all fish was taken to be 1 July, so that the outer annulus was counted ... -Costaz (1980) considered annual structures to be marked by a thickening of the scale combined with ...

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

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