Search results

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

   ., 2003), diet (Fenaughty et al., 2003) and, to a lesser extent, reproduction (e.g. Patchell, 2001, 2002 ... fish are resting or maturing while the fishery takes place (Patchell, 2001, 2002). Since 2002/03 ... available, but HiGEM has the advantages of being fully glo- bal (and hence covering the whole of the Ross ... Sea except that part under the Ross Ice Shelf), being coupled to an atmosphere and sea-ice model ... 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 ...

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

2. Potential interactions between wandering albatrosses and longline fisheries for Patagonian toothfish at South Georgia

   evenly distr ibuted between August 1990 and September 1994, we have a total of 9 518 location uplinks ... % of their uplinks were over the South Georgia shelf, most of the remainder being in one or two specific areas ... that D. exulans breeding at South Georgia have a relatively low potential risk of interaction with ... comprehensive use, we recommend that the South Georgia longline fishery for D. eleginoides should be managed in ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 101–110 : Author(s): Croxall, J.P. and P.A. Prince

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

   melanophrys) which breed at the Diego de Almagro Islands (15 594 pairs in 2001/02) (Lawton et al., 2003 ... for Dissostichus eleginoides between October and December 2006. Vessel Number of sets using the new mix design ... ) obtained during the fishing season for a vessel from the fleet for the last five years, from 2001 to 2005 ... 0,5 0,6 Sept Oct Nov Dec FISHING SEASON (MONTHS OF 2006) C PU E K g / H oo k 2000 2001 ... modified artisanal system, which includes a net sleeve that is placed on secondary vertical lines, has ... macrocephalus). The performance of this fishing technique with regard to seabird mortality and depredation by ... then compared with similar data obtained in 2002 in the same fleet in the same fishing grounds prior to ...

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

4. Areal and seasonal extent of sea-ice cover off the northwestern side of the Antarctic Peninsula: 1979 to 1996

   regions in the western Antarctic from October 1978 to August 1994, including the Long Term Ecological ... data collected by the Scanning Multichannel Microwave Radiometer (SMMR) from October 1978 to August ... versus years, four periods of extensive ice cover are evident. The first period peaked in August 1980 ... . The second peaked in August-September 1986; the ice did not fully retreat during the following summer ... 6 km 2 /month. This index may be used in conjunction with studies of variability in biological ... measuring 1.25 x 10 6 km 2 off the northwestern side of the Antarctic Peninsula indicates that there were ... with features described by Stammerjohn and Smith (1996) for ice cover in the Bellingshausen Sea ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 65–73 : Author(s): Hewitt, R

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

   2 to 3 hours and being similar to' commercial hauls of 3 hour duration. A relatively high catch rate, similar ... for codend construction. The most difficult matter will be preparing a codend with proper selectivity ... commercial fishery, with a nominal mesh size A = 80 mm and A = 100 mm, made of double twines with a thickness ... of 4.2 mm. The studies covered 6 major fish species. It appears from the study that Antarctic icefish ... sufficiently good level seems possible as a result of the application of webbing with permanently open meshes ...

   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.

6. An alternative method for estimating the level of illegal fishing using simulated scaling methods on detected effort

   not respond to being detected at all, but act as if they were not detected. The variation in the amount ... uncertainty increases as the evasion rate increases. This research suggests that it would be possible to ... (2005) method, and this suggests that the current method is adequate under circumstances of low evasion ... and when good knowledge exists that zero observations reflect zero illegal fishing. The new method ... by illegal activity. Both the new and the current method suffer from the fact that the observation ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 143–161 : Author(s): Ball, I

7. Size at sexual maturity of Patagonian toothfish (Dissostichus eleginoides)

   . The periods used were March/April, May/June and July/August. The only exception to this was that, due ... to the closure of the fishery, there were no data for August 1996; this category therefore only contains data ... Male MaylJune 1997 Male JulylAugust 60 70 80 90 100 110 120 130 Length (cm) Figure ... March/April 1996 May/June 1996 July 1996 March/April 1997 May/June 1997 July/August l997 Females ... that L m50 occurs at 78.5 cm total length for male and 98.2 cm for female fish. In 1997 the results for ... male fish were essentially the same. For female fish there is evidence that in 1997 a significant ... allowing for this bias indicates that L m50 for female fish in 1997 was no different to that for 1996. The ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 37–46 : Author(s): Everson, I. and A.W. Murray

8. Trawl bag selectivity in the Champsocephalus gunnari fishery

   BpeM5I, npe~OCTaBJIeHHOe ~JI5I npoBe~eHH5I ~KcnepHMeHToB, 6bIJIO OrpaHHqeHO, ~aHHbIe pe3YJIbTaTbI CJIe ... ~yeT paccMaTpHBaTb KaK npe~BapHTeJIbHbIe. .llJI5I 51qeH pa3MepOM B 80 MM BeJIHqHHa LsO% paBH5IJIaCb ... above are given in Table 1. Trawling duration was from 10 to 70 minutes with the average being 44 ... length frequency distribution and biometrlc characteristics for the period being studied are given ... were carried out in June 1990 in the South Georgia area concurrently with trawl surveys as part of the ... to the limited time available for experiments, should be considered as preliminary. L 50% was 24.8 cm ... and the selectivity factor was 3.10 for a mesh size of 80 mm. Comparison of these results with results ... cm) as well as earlier sexual maturation of fish were noted. It was suggested that the use of Polish ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 295–312 : Author(s): Bidenko, V.G. and I.G. Istomin

9. Modelling variability and estimating power to detect change in Adélie penguin fledgling weights

   from 12 split-year breeding seasons (1990/91 to 2001/02) which com- mence in October of one year ... 85 10: 1999–2000 50 50 11: 2000–2001* 50 50 50 150 12: 2001–2002* 50 50 50 150 Total 100 ... to detect change being lower than a more intensive monitoring strategy where data are collected ... /2 (d)). 1 2 3 4 5 2000 3000 4000 5000 1991/92 1993/94 1995/96 1996/97 1998/99 2000/01 2001/02 model prediction ... finding is that it may be possible to simplify future monitoring, such that fledgling weight is measured ... variability of fledgling weights. These models assume that data are collected during a fixed CEMP five-day ... period corresponding to the average peak fledging period. Modelling assumes that fledgling weights are ... year, but there was no evidence that the rate of decline differed between years. A consequence of this ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 191–200 : Author(s): Emmerson, L.M., C. Southwell and J. Clarke

10. A proposed management procedure for the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity

    in the future at a constant rate of 150 tonnes per year. The probability of the CPUE index in 2026 being less ... instead of 0.75, with the productivity of the resource consequentially being lower. Under the Less ... , whereas catch-at-length information indicates that past catches have had relatively little impact on ... catches made. An MP with control parameter values specified is proposed for implementation based on the ... -recruitment curve steepness h is low. These tests also indicate that monitoring of future catch-at-length ... information would be necessary to guard against a change in selectivity towards greater catches of older fish ...

    Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 33–69 : Author(s): Brandão, A. and D.S. Butterworth

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