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1. A potential feedback approach to ecosystem-based management: Model Predictive Control of the Antarctic krill fishery

   feedback management as an approach that ‘will use decision rules to adjust selected activities (dis ... 7 and dis- cussed in ‘Results’. State estimation In living resource management in general, and EBM ... differences between ecosystems and man-made systems in terms of objectives, uncertainty and complexity ... , developed initially for man-made systems, can aid the devel- opment of management approaches for ecosystems ... optimisationbased approaches such as MPC are computationally capable of dealing with EBM-type problems. They are ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 119–137 : Author(s): Hill, S.L. and M. Cannon

2. Effects of recruitment variability and natural mortality on generalised yield model projections and the CCAMLR decision rules for Antarctic krill

   , or in such methods as CMIX, is based on the size dis- tribution in each year being independent of the size ... by the CCAMLR decision rules for different gamma levels have been based on the Beta dis- tribution ... to compare population responses to proposed levels of harvest against decision criteria. From the early ... 1990s until 2009 the catch by the Antarctic krill fishery remained around 120 000 tonnes per year ... (Euphausia superba) fishery. The current precautionary catch limit was based on supplying the GYM with a ... krill around the Antarctic Peninsula (Subarea 48.1) along with increasing rates of natural mortality ... the annual size distributions of krill in penguin diets. Simulations with either no fishing, or with ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 81–96 : Author(s): Kinzey, D., G. Watters and C.S. Reiss

3. Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions 58.4.1 and 58.4.2)

   with the Ross Sea, where an analytical assessment has been possible for several years, and through analysis ... where time at liberty was a year or more). These recaptures were inconsistent with expectations given ... Sea, where an analytical assessment has been possible for several years, and through analysis of local ... five where time at liberty was a year or more). These recaptures were inconsistent with expectations ... for fishing over the last three years, some early data (pre 2005) do exist for SSRUs that are cur- rently ... rates with the Ross Sea, where an analytical assessment has been possible for several years ... recaptured (only five where time at liberty was a year or more). These recaptures were inconsistent ... in different years. Catches have been poor in the west (Division 58.4.2), as a result of poor catch rates ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 71–100 : Author(s): Agnew, D.J., C. Edwards, R. Hillary, R. Mitchell and L.J. López Abellán

4. Note on estimating krill abundance from acoustic data on individual aggregations

   . Forbes and Nakken, 1972; Johannesson and Mitson, 1983; Maclennan and Simmonds, 1992). This method ... , 1989a). In recent years, advances in acoustic hardware and software have enabled fine resolution (i.e ... , Hobart, Australia: 19 pp. FORBES, S.T. and O. NAKKEN (Eds). 1972. Manual on methods for fisheries ... estimation. FAO Man. Fish. Sci. No. 5: 138 pp. HAMPTON, I. 1981. Suggested methods for observation ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 219–223 : Author(s): Hampton, I. and D.G.M. Miller

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

   of 3 to 3.5 knots. Hauls were frequently terminated early due to rough ground. Most hauls were made during ... that there had been some redistribution of major concentrations over the shelf during the past five years. He ... on the biomass estimate and therefore warranted different analytical procedures. This is discussed further later ... by the highest density in the middle stratum of western South Georgia, in which all the larger catches were made ... hauls interspersed with a few large catches. The small number of large catches cause a disproportionate ...

   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)

6. Factors affecting the incidental mortality of seabirds in the Dissostichus eleginoides fishery in the southwest Atlantic (Subarea 48.3, 1995 season)

   was doubtful was clarified later board fishing vessels in order to collect scientific with the help ... by six Chilean vessels and six Argentinian vessels, one vessel from each country having made two ... fishing trips, as indicated in Tables 1 and 3. Thus, 14 fishing trips (87.5%) out of a total of 17 trips ... in this paper. Data on incidental mortality from the Korean vessel Ihn Sung 66, which made two trips during ... with the information collected by international scientific observers from each vessel. It was thus ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 79–91 : Author(s): Moreno, C.A., P.S. Rubilar, E. Marschoff and L. Benzaquen

7. Fishing ground selection in the Antarctic krill fishery: trends in patterns across years, seasons and nations

   years, seasons and nations Abstract / Description:  Patterns of fishing ground selection were ... contributors to the total catch. A recent shift in operational timing towards later months within fishing ... remained relatively constant in Subareas 48.2 (March–May) and 48.3 (June–August). In 25 years of krill ... Fishing ground selection in the Antarctic krill fishery: trends in patterns across years, seasons ... to examine the relationship of these operational patterns directly to krill dis- tribution and abundance ... from SUN (SGE and SOW). In later years, UKR occasionally used APEI (1996) and APDPW (2001 ... ), but maintained its main fishing grounds in SGE and SOW. UKR also started to use SGW in later years. 121 ... Fishing ground selection in the AntArctic krill Fishery: trends in pAtterns Across yeArs, seAsons ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 117–141 : Author(s): Kawaguchi, S., S. Nicol, K. Taki and M. Naganobu

8. A preliminary investigation of the possible effects of rhizocephalan parasitism on the management of the crab fishery around South Georgia

   of the parasite is likely to be, but at the one extreme a parasite could live until its host dies. Crabs ... fishing trip targeting crabs in Subarea 48.3, by the FV Pro Surveyor, presented in Otto and MacIntosh ... fishing trip, indicate that very few infected animals are found above the minimum 'commercial' size ... survive, the harvest would only include healthy males. If the infected discards are destroyed or die ... contrasted with the effects of harvesting healthy animals only. Equilibrium and transition dynamics of the ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 175–192 : Author(s): Basson, M

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

   by introducing modifications of the gear, like changing the dis- tance between weights or integrating weight ... ) reported high levels of depre- dation with ‘almost the entire catch’ lost from some lines. Off Chile ... side of the hauling bay of vessels and changes in the fishing season to the time of year in which ... in the line. During the last five years in the Chilean long- line fishery for toothfish, strong positive ... 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

10. A statistical method for estimating the level of IUU fishing: application to CCAMLR Subarea 48.3

    have been at least one encounter with an FPV in a year; no encounters in a year are interpreted as zero ... of fish catch rate was calculated for each area and each year using reported catch and effort data ... CCAMLR observer data weighted by the number of hooks observed. These data were obtained in the early ... licensed fishery (1997) when few vessels used mitigation measures. Three years were analysed: 1998/99, 1999 ... of days fi shing for the IUU cruise1 detected by an FPV, i, in year y, Di,y, was thus calculated from FPV ... encounters with IUU vessels as: Di,y = Li,y – Ei,y (1) where L is the latest and E is the earliest date ... shing, then Ai,y = pa,y Di,y (2) where p is the correction factor used to convert IUU days fi shing ... with an FPV in a year; no encounters in a year are interpreted as zero IUU fi shing. For each IUU incident ...

    Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 119–141 : Author(s): Agnew, D.J. and G.P. Kirkwood

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