Search results

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

   (Euphausia superba) in the Scotia Sea, CCAMLR established a precautionary catch limit of 4 million tonnes and ... catch limit for krill among the SSMUs so as to preclude the inadvertent concentration of catches in a ... predator demand in the SSMU. The fifth option is a dynamic allocation based on land-based predator ... the fi rst two options a substantial portion (>65%) of the catch limit would be allocated to three ... of Antarctic krill (Euphausia superba) in the Scotia Sea, CCAMLR established a precautionary catch ... inadvertent concentration of catches in a small portion of the surveyed area. Five options for allocating the ... is a dynamic allocation based on land-based predator monitoring conducted just prior to, or early in ... estimates is possible. Qualitative conclusions are that: under the fi rst two options a substantial portion ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 81–97 : Author(s): 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. Fishing for toothfish using pots: results of trials undertaken around South Georgia, March–May 2000

   a pot fishing method to catch Patagonian toothfish (Dissostichus eleginoides) around South Georgia ... method successfully caught D. eleginoides, there was a large by-catch of crab species. The catch rate of ... eliminated bird by-catch. To capitalise on this feature, there is a need to improve the commercial viability ... of the method and minimise the quantity of by-catch. A number of potential changes are suggested to ... period March to May 2000, the UK undertook trials of a pot fishing method to catch Patagonian toothfish ... , there was a large by-catch of crab species. The catch rate of toothfish was notably lower than that ... this feature, there is a need to improve the commercial viability of the method and minimise the q ... ~~ant i ty of by-catch. A number of potential changes are suggested to this end. Resume De mars a ...

   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

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

   as functions of krill abundance, by considering a krill dynamics model incorporating recruitment ... krill predator species. A 'one-way' interaction model is developed, in which krill abundance ... sufficient realism to provide a possible basis for management recommendations. A mathematical framework for a ... considering a krill dynamics model incorporating recruitment fluctuations together with preliminary ... information on adult survival and breeding siuccess patterns for certain krill predator species. A 'one-way ... developments of this approach, before the latter can claim sufficient realism to provide a possible basis for ... management recommendations. A mathematical framevvork for a 'two-way' interaction model (including also the ...

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

4. Analysis of results from demersal fish surveys at South Georgia, undertaken by the United Kingdom and the USSR, January and February 1990

   discussions and analyses of the data from a survey from MV Hill Cove in January 1990 and RV Akademik Knipovich ... hauls interspersed with a few large catches. The small number of large catches cause a disproportionate ... (Report of a Joint UK/USSR Workshop, 23 to 27 July 1990) Abstract The report describes discussions and ... analyses of the data from a survey from MV Hill Cove in January 1990 and RV Akademik Knipovich in ... interspersed with a few large catches. The small number of large catches cause a disproportionate increase in ... provenant d'une campagne d'evaluation effectuee a bord du navire march and Hill Cove en janvier 1990 et du ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 223–254 : Author(s): (Report of a Joint UK/USSR Workshop, 23 to 27 July 1990)

5. Defining smaller-scale management units to further develop the ecosystem approach in managing large-scale pelagic krill fisheries in Antarctica

   predators’ needs when managing the fishery for Antarctic krill. It provides a theoretical foundation for ... the harvested species, and the ‘predator unit’, which does not have to be a relatively self-contained ... local populations of krill and the potential foraging densities of predators from within a harvesting ... unit (i.e. abundance of predators, distribution of colonies and foraging range) will provide a means of ... provides a theoretical foundation for considering the scales of manage- ment units involving the ... unit’, which does not have to be a relatively self-contained ecosystem but should be suffi ciently ... potential foraging densities of predators from within a harvesting unit (i.e. abundance of predators ... , distribution of colonies and foraging range) will provide a means of circumscribing predator units as well as ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 117–131 : Author(s): Constable, A.J. and S. Nicol

6. Refinements to the strategy for managing depleted fish stocks based on CCAMLR objectives

   objectives Abstract / Description:  A method of calculating fishing mortalities which will allow depleted ... states of a depleted stock, and take into account uncertainty in assessments. Sample calculations show ... that applying a policy of F 0.1 will not always lead to stock recovery in two to three decades, and ... MANAGING DEPLETED FISH STOCKS BASED ON CCAMLR OBJECTIVES W.K. de la Mare* and A. Constable** Abstract ... A method of calculating fishing mortalities which will allow depleted fish stocks to recover to ... fishing mortalities are based on probabilistic descriptions of the future states of a depleted stock ... , and take into account uncertainty in assessments. Sample calculations show that applying a policy of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 467–475 : Author(s): de la Mare, W.K. and A. Constable

7. Distribution of the Soviet krill fishing fleet in the South Orkneys area (Subarea 48.2) during 1989/90

   fishing ground off the northwestern tip of Coronation Island. CPUE showed variability with a minimum in ... respectively), followed by a decrease to 6.9 and 7.1 tonnes/hour by May and June. The location of the fishing ... hydrodynamic characteristics of the area, for example a complex current around the islands together with ... aggregations. A maximum CPUE (3.8 tonnes/hour) was recorded at the beginning of the period, with a subsequent ... one fishing ground off the northwestern tip of Coronation Island. CPUE showed variability with a ... /hour respectively), followed by a decrease to 6.9 and 7.1 tonnes/hour by May and June. The location of ... by certain hydrodynamic characteristics of the area, for example a complex current around the ... current together with krill aggregations. A maximum CPUE (3.8 tonnes/hour) was recorded at the beginning ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 51–62 : Author(s): Sushin, V.A

8. By-catch of fishes captured by the krill fishing vessel Chiyo Maru No. 2 in Statistical Area 58 (January to March 1995)

   Statistical Area 58 (January to March 1995) Abstract / Description:  Armstrong (1995) presented a final report ... . Unfortunately, Armstrong's fish by-catch data were not presented in a standardised manner. This paper ... presents a brief re-analysis of the by-catch data collected on board the Chiyo Maru No. 2; means and ... Chiyo Maru No. 2 did not provide a clear picture of the reiationship between haul-specific fish by-catch ... , San Diego CA 92038, USA Abstract Armstrong (1995) presented a final report of scientific ... fish by-catch data were not presented in a standardised manner. This paper presents a brief re ... Maru No. 2 did not provide a clear picture of the reiationship between haul-specific fish by-catch and ... a fraction of haul-specific krill catches) for observers collecting data on fish by-catch. Resume ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 111–123 : Author(s): Watters, G

9. Sea-surface temperature and krill catches around South Georgia in December–February 1989–1991 and 1999–2001

   conducting a krill fishery in the area during the entire year. The reliability of these forecasts could be ... with the early 1990s, the period from December to February in the late 1990s and early 2000s showed a ... was-0.62°C). The observed cooling of South Georgia waters had a negative effect on fi shing activities ... . However, it dropped to 39 766 tonnes in 2000/01. The SST maps for 1999–2001 showed a prominent advection ... conducting a krill fi shery in the area during the entire year. The reliability of these forecasts could be ... showed a considerable decrease in mean SST off South Georgia. This observation is especially obvious ... the SST anomaly was -0.62°C). The observed cooling of South Georgia waters had a negative effect on ... a prominent advection of Weddell Sea waters to the northwest of South Georgia and a weakening of ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 165–174 : Author(s): Vanyushin, G.P

10. Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined with various codends

    codends (mesh size 120 mm) and single-layer tape codends with a mesh size of 60 and 100 mm were determined ... , especially Scotia Sea icefish and South Georgia icefish the determination of a proper mesh size of trawls ... used in fishing for them requires further research. It should first of all cover twine codends with a ... mesh size of 80 mm, currently used on factory trawlers, as well as codends with a structure resembling ... -layer tape codends with a mesh size of 60 and 100 mm were determined. It was found that the ... Sea icefish and South Georgia icefish the determination of a proper mesh size of trawls used in ... fishing for them requires further research. It should first of all cover twine codends with a mesh size ... of 80 mm, currently used on factory trawlers, as well as codends with a structure resembling tape ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 1-48 : Author(s): Zaucha, J.

Pages