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1. Options for allocating the precautionary catch limit of krill among small-scale management units in the Scotia Sea

   increase, a trade-off may be drawn between options that displace the fishery from its current operating ... that considerable refi nement of these estimates is possible. Qualitative conclusions are that: under ... the fi rst two options a substantial portion (>65%) of the catch limit would be allocated to three ... ) and (iv) a similar portion of the catch limit would be directed to pelagic SSMUs beyond the foraging ... dynamic option that could be implemented imme- diately with the limited information to hand, and improved ... that krill catches be reported at a scale of 10 by 10 n mile squares by 10-day periods at the end of ... requirement should be considered an interim measure and that haul-by-haul data by 10-day periods should be ... fraction of the total precautionary catch limit (Y) that can be taken in the ith SSMU; and Σai = 1. A ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 81–97 : Autor(es): Hewitt, R.P., G. Watters, P.N. Trathan, J.P. Croxall, M.E. Goebel, D. Ramm, K. Reid, W.Z. Trivelpiece and J.L. Watkins

2. Analysis of haul data from the South Georgia krill fishery

   Georgia suggests that fisheries-based indices may be of value for management purposes, consequently ... were produced. The measurements emphasise that the krill fishery at South Georgia was geographically ... several hauls were undertaken by each vessel (average 7.9 in 1993,9.9 in 1995, and 7.0 in 1996), with ... establish the time required for each phase of the fishing operation. The times associated with shooting and ... that fisheries-based indices may be of value for management purposes, consequently further detailed ... and that times and positions were consistent with other records. A few records (-1.5%) contained ... irregular, with the greatest shift in August and September, at the end of the season when there are fewer ... (Table 2). That this period was variable with substantial differences between years is consistent with ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 9–30 : Autor(es): Trathan, P.N., I. Everson, E.J. Murphy and G.B. Parkes

3. CCAMLR ecosystem monitoring and management: future work

   management procedure which includes decision rules that specify how harvest controls will be adjusted based ... managing fisheries with the maintenance of ecological relationships included in the conservation objectives ... on the scientific information available and the assessments that arise from such information. To ... , incorporating: (i) operational objectives that articulate the target conditions of relevant aspects of the ... be infl uenced by the population abundance of krill combined with the factors that infl uence the ... controls will be adjusted based on the scientifi c information available and the assessments that arise ... application is based on a management procedure with pre-agreed decision rules that specify how harvest ... needs to determine what else may be required to ensure that the application of these precautionary ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 233–253 : Autor(es): Constable, A.J

4. Variations in condition indices of mackerel icefish at South Georgia from 1972 to 1997

   mass is shown to provide a good indicator of local krill density. The index is likely to be little ... in krill availability. Condition index provides a useful proxy for krill density and is likely to be ... of considerable value in interpreting the results from ecosystein assessments such as that in ... clear that 'good' and 'poor' krill status are not j ~ s t seasonal categories, but need to be ... can vary but, for this study, we assume that the greatest variation is likely to be present in the ... from this that condition index is following food availability with a short, of the order of a month ... region of deep water, the degree of separation means that there are likely to be different feeding ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 119–132 : Autor(es): Everson, I. and K.-H. Kock

5. Species identification and age estimation for the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea

   methodology has yet to be validated for this species. Von Bertalanffy growth parameters were calculated from ... the readings, separately by sex. M. whitsoni appears to be a slowgrowing and long-lived species ... be from 12 to 14 years. File:  03marriott-etal.pdf ... noted that the results presented below are preliminary, as the ageing technique used has yet to be ... the collection (Marriott and Horn, 2001). It was assumed that the majority of macrourids sampled ... to be collected from each of 50 sets, frozen and stored. These samples should be labelled with ... samples were indistinguishable from the 1999 samples that had been assumed to be M. whitsoni. Both ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 37–51 : Autor(es): Marriott, P., P.L. Horn and P. McMillan

6. Distribution of mackerel icefish (Champsocephalus gunnari) (Channichthyidae) around South Georgia at various stages of its life cycle

   fish were found to be distributed throughout the water column at all times of the day, but they also ... Shlibanov, 1989) showed that C. gunnari inhabited waters with a temperature range of 0.6 to 1.8ºC. Within ... Our studies revealed that the ecology of C. gunnari varied both within and between years and with ... , 2001). For reasons as yet unknown, this could be linked to an absence of fi sh migration from the ... temperature could not be a limiting factor for fi sh distribution. Therefore, during that period fi sh ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 49–69 : Autor(es): Frolkina, Zh.A

7. [node:field-journal-volume]:37-51

   noted that the results presented below are preliminary, as the ageing technique used has yet to be ... the collection (Marriott and Horn, 2001). It was assumed that the majority of macrourids sampled ... to be collected from each of 50 sets, frozen and stored. These samples should be labelled with ... samples were indistinguishable from the 1999 samples that had been assumed to be M. whitsoni. Both ...

   Science Journal Paper : 37–51

8. Age, growth and size at sexual maturity of Macrourus carinatus caught as by-catch in Australian sub-Antarctic trawl fisheries

   growth parameters for both sexes combined were: L ∞ = 690 mm, K = 0.069 and t 0 =-2.4. The size at sexual ... to that from Macquarie Island. Otolith and body size relationships are presented for M. carinatus ... accordance with this, anal length will be used as the standard for this species in all future work ... from Macquarie and Heard and McDonald Islands with that derived by Morley and Belchier (2002) for M ... Ross Sea (Figure 6). These were signifi cantly different when compared with a lack-of-fi t test ... separation of sites and the distinction between species, it should be noted that the under-representation ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 139–151 : Autor(es): van Wijk, E.M., R. Williams and A.J. Constable

9. A hypothetical life cycle for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region

   linked to the high-resolution global environmental model (HiGEM). Model outputs indicated that the ... locations of toothfish larvae after an 18–24 month period were moderately consistent with the distribution ... of the smallest toothfish taken in the toothfish fishery. The hypothesis presented is that D. mawsoni ... continental shelf; south onto the Ross Sea shelf; or eastwards with the eastern Ross Sea gyre, settling out ... includes a sea-ice model that interacts with both the ocean and atmosphere components of the climate ... . (1995) and North (2002) considered that D. eleginoides eggs were most likely to be pelagic, but did ... not rule out the possibility that they could initially be demersal, as suggested by Zhivov and ... assuming a winter–spring spawn- ing time with a peak in July/August would sug- gest an egg development time ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 35–53 : Autor(es): Hanchet, S.M., G.J. Rickard, J.M. Fenaughty, A. Dunn and M.J. Williams

10. Target strength studies on Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea

    ), some sizes of P. antarcticum could be confused acoustically with E. crystallorophias, but not with E ... -larvae of P. antarcticum with a total length from 13 to 70 mm, were conducted in the southeast of the ... indicate that the TS–TL relationships at 38, 120 and 200 kHz of adults of P. antarcticum differ ... both ex situ and in situ with a mean difference <1.5 dB, although the differences between the ... . With an appropriate sampling regime it can be expected that, on average, the inac- curacies of the ... swimbladder have not been conducted over as large a range of species and sizes as that of fish with ... . It is unlikely that those results could be adequate to give even a rough indication of the target ... influenced by the swimming angle. However, this effect could be less than expected for fish with scattering ...

    Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 75–104 : Autor(es): Azzali, M., I. Leonori, I. Biagiotti, A. De Felice, M. Angiolillo, M. Bottaro and M. Vacchi

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