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1. Management and assessment options for the crab fishery around South Georgia

   context of this crab fishery with specific reference to the principles of the CCAMLR Convention. We ... in addition to the 'size-sex-season' controls. Implementation of both sets of controls ... /effort controls also requires estimates of stock abundance, which could be obtained by depletion methods ... . Consideration should also be given to the creation of refuges, though careful attention must be given to their ... restrict total fishing effort. Another management tool which can be used in combination with those ... are highly migratory, the stock structure in the refuge could actually be quite similar to that ... objective can partly be addressed by limiting catch and/or effort to ensure that the fishery does not ... develop at a rate that is incompatible with (i.e., mkch faster than) our ability to assess the stock and ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 193–202 : Auteur(s): Basson, M. and D.D. Hoggarth

2. Additional data on anti-Brucella antibodies in Arctocephalus gazella from Cape Shirreff, Livingston Island, Antarctica

   the Competitive Enzymoimmunoassay 'COMPELISAO®' test.  Antibodies against Brucella spp. were ... detected in one sample with the RB test, and in five of the 86 samples (5.8%) using the c-ELISA test. These ... regard, and suggest that Brucella spp. has an extended distribution and is probably found worldwide in ... inhibition on colour development (% I) with respect to the conjugate control that had 0% I; and the sera ... the RB test. Nevertheless we would expect that sera with high % I for the c-ELISA test would have a ... Anti-Bsucelln antibodies in A. gnzelln from Cape Shirreff with the COMPELISAO test, suggesting that ... important questions that should be considered by the CCAMLR Working Group on Ecosystem Monitoring and ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 147–154 : Auteur(s): Blank, O., P. Retamal, P. Abalos and D. Torres

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

   whether a feedback approach is likely to achieve the multiple objectives that EBM implies in the complex ... simulation model that incorporates uncertainty and spatial and trophic complexity. The approach adjusted ... spatially resolved annual catch limits in response to estimates of the state of the system. It suggests that ... catch limits, which are currently used to manage Antarctic krill fisheries. The study demonstrates that ... state (direct empirical measurements, which might be used with an assessment model that integrates ... 124 operating model and that of Constable (2001), these values had to be adjusted so that the chance ... performance of a feed- back approach with a fixed catch limit approach such as that currently used to manage ... Constable (2001), and harvesting and movement are represented with additive loss or gain terms. Hill ...

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

4. Identifying taxonomic groups vulnerable to bottom longline fishing gear in the Ross Sea region

   vulnerable marine ecosystems (VMEs) requires a specific list of the taxa that are considered vulnerable in ... can be more than 3 m tall, consisting of complex branching structures with brittle skeletons that ... under discussion by managers and scientists. There is general agree- ment that areas with certain ... that contains rare species whose loss could not be compensated for by similar areas or ecosystems ... for selecting a group of taxa to monitor the fishery rather than identifying taxa that may be ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 105–127 : Auteur(s): Parker, S.J. and D.A. Bowden

5. A preliminary assessment of age and growth of Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea, Antarctica

   -growing with a moderate longevity; the maximum estimated age was 14.3 years. Von Bertalanffy parameters ... about two-thirds of the sampled fish could not be sexed. Precision estimates and age bias plots ... indicated that there was good within-reader and between-reader agreement, so the otolith sections appear ... able to be consistently interpreted. The standard lengths of the sampled Antarctic silverfish ranged ... sections would be expected to have a margin that was opaque or with only a minute amount of translucent ... . Hubold and Tomo (1989) suggested that growth of Antarctic silverfish could be quite variable be- tween ... could not be sexed. This was because about 20% of the sam- ple was from small fish (≤10 cm SL) with ... unscaled age­frequency histogram (Figure 8) shows that fish ranged in age from 0+ to 14+ years with age ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 75–86 : Auteur(s): Sutton, C.P. and P.L. Horn

6. Fishing intensity of the Soviet fleet in krill fisheries in the southern Atlantic (Subareas 48.2 and 48.3)

   assessed using data from 22 800 hauls. The results of this study indicate that during periods of maximum ... -dependent predators. It is concluded that although there is a spatial overlap of the dependent species and ... krill fi shing (CCAMLR, 2001). Boyd (2002a) suggested that reduced or even zero fi shing might be ... that it would be com- pletely opened by time the vessel reached the krill aggregation. The trawl was ... . It demonstrates that results obtained for the standard system are in good agreement with results ... area of the grounds, as indicated in Figures 2 and 3, so that they remained in localities with a ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 15–35 : Auteur(s): Kasatkina, S.M. and V.F. Ivanova

7. A first attempt at an assessment of the Patagonian toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands EEZ

   its pre-exploitation level. Projections suggest that the annual catch limit should be reduced to a ... a robust indication that the spawning biomass has been depleted to, at most, a few percent only of ... -exploitation level. Projections suggest that the annual catch limit should be reduced to a maximum of about ... density, the values in Table 3 are assumed to be proportional to abundance in the analyses that follow ... during April 2001. A crude analysis of the resulting data, based on swept-area methodology (with ... procedure used may be found in Leslie and Watkins (2001). ASSESSMENT METHODOLOGY This initial assessment ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 11–32 : Auteur(s): Brandão, A., D.S. Butterworth, B.P. Watkins and D.G.M. Miller

8. Estimating confidence intervals for fish stock abundance estimates from trawl surveys

   likelihood ratios from Aitchison's delta distribution. Simulation tests of the method show that unbiased ... estimates of density and biomass can be obtained and that the estimated confidence intervals have close to ... fish and the coefficient of variation (CV) is high. The upper confidence bound appears to be slightly ... . Simulation tests of the method show that unbiased estimates of density and biomass can be obtained and that ... likelihood. However, the likelihood is a function of the vector b, so that the log-likelihood has to be ... %). The upper confidence bounds appear to be slightly too close to the mean, with REFERENCES ... upper confidence bound appears to be slightly less reliable than the lower. Resume Developpement ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 203–207 : Auteur(s): de la Mare, W.K

9. A first step towards modelling the krill–predator dynamics of the Antarctic ecosystem

   , together with suggested further areas for investigation. Amongst the key inferences of the study are that ... trend levels that has become available since the postulate was first advanced is discussed. The ... stable; (iv) baleen whales have to be able to achieve relatively high growth rates to explain observed ... trends; and (v) Laws’ (1977) estimate of some 150 million tonnes for the krill surplus may be appreciably ... interactions with prey organ- isms that must be aggregated to exceed some threshold density (e.g. baleen ... taken between 1973 and 2001 (Miller, 2002). The fishery has been stable for the past nine years with ... Georgia in the 1980s but not in the 1990s, so that the period of the ‘krill surplus’ might now be at an ... Antarctic seabird populations with regional climate change, Croxall et al. (2002) concluded that in ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 217–277 : Auteur(s): Mori, M. and D.S. Butterworth

10. A review of the effectiveness of streamer lines as a seabird by-catch mitigation technique in longline fisheries and CCAMLR streamer line requirements

    : requiring that the streamer line be deployed over the hookline within 100 m of the stern; increasing the ... object be deployed windward of the hookline; and recommending that fishers deploy a minimum of two ... streamer line; requiring that individual branched streamers extend to the water in the absence of wind and ... swell and be attached throughout the aerial extent of a streamer line; including ultraviolet-protected ... ineffective. Løkkeborg (2001) suggested that the wind effect could be remedied by using paired streamer ... ; requiring that individual branched streamers extend to the water in the absence of wind and swell and be ... performance standard; requiring that streamer line attachment points to the vessels and the towed object be ... Mortality Arising from Fishing (WG-IMAF) noted in 2002 that CCAMLR streamer line requirements could be ...

    Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 189–201 : Auteur(s): Melvin, E.F., B. Sullivan, G. Robertson and B. Wienecke

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