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1. Mitigation of seabird captures during hauling in CCAMLR longline fisheries

   / Description:  In recent years there has been an increased focus on reducing seabird captures that occur during ... suggest that there are two key aspects of effective BEDs, firstly that they provide a deterrent to ... swimming or ‘jumping’ into the area around the hauling bay. Based on this analysis, CCAMLR incorporated ... these two key functional characteristics into the specification of a BED to be deployed by longline ... MRAG Ltd 18 Queen Street, London W1J 5PN United Kingdom Abstract In recent years there has been an ... the hauling bay. Based on this analysis, CCAMLR incorporated these two key functional characteristics ... CAMLR Convention Area and to make recommendations for moving toward prescriptive advice on a standard ... this information, albeit often on an ad hoc basis, the observers play a key role in the iterative ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 155–162 : Autor(es): Reid, E., B. Sullivan and J. Clark

2. Age, growth and mortality of Patagonian toothfish (Dissostichus eleginoides) caught off Kerguelen

   estimated to be –0.6 years and residual variance 2.9. Age distributions of toothfish caught by two vessels ... otoliths from reference collections were used to measure precision; relative bias for the age data was ... depth or season. Age–length keys were constructed for use in assessing toothfish catches made by ... trawlers and longliners at Kerguelen, and longevity was estimated to be 36 years. Total instantaneous ... ge ( ye ar s) 0 10 20 30 40 50 Reference age (years) 0 10 20 30 40 50 E st im at ed a ... estimated for reader R2. 0 10 20 30 40 50 T ot al le ng th ( cm ) 0 20 40 60 80 100 120 140 ... Estimated age (years) 0 10 20 30 40 50 T ot al le ng th ( cm ) 0 20 40 60 80 100 120 140 (a ... for the age data was estimated to be –0.6 years and residual variance 2.9. Age distributions of ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 29–41 : Autor(es): Ashford, J., G. Duhamel, C. Jones and S. Bobko

3. Krill (Euphausia superba Dana) resources and distribution in the Wilkes Land area in the seasons 1986 to 1989

   mainly focused on the search for exploitable krill aggregations. Two research vessels were simultaneously ... account an area to the north of the edge of the continental slope. Each subarea was described in terms of ... was considered as the most valuable for the krill fishery. Krill aggregations were most frequently and ... for Fisheries 3 The annual period used is the split-year 1 July to 30 June. Split-year is denoted by ... for exploitable krill aggregations. Two research vessels were simultaneously involved in the survey ... it is in subarea ll. Data for many years show that optimum conditions for the formation of krill ... 1986 50 12.2 1000 50.0 20 to 21 April 3 1986 300 3.5 158 47.5 24 to 30 April 4 1987 127 14.0 1510 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 149–162 : Autor(es): Dolzhenkov, V.N. and V.P.Timonin

4. A study of Patagonian toothfish (Dissostichus eleginoides) post-tagging survivorship in Subarea 48.3

   . Toothfish were kept in tanks with seawater replacement for at least 12 hours after tagging. On one vessel ... in Subarea 48.3 Abstract / Description:  During the 2005 fishing season, experiments on the ... survivorship of toothfish following tagging were carried out on eight different vessels fishing in Subarea 48.3 ... , 396 animals were included, with an overall survivorship of 90%. Smaller animals and animals in better ... seawater replacement for at least 12 hours after tagging. On one vessel, fish with a variety of injuries ... mark–recapture studies have been under way for several years around Heard Island, South Georgia, and ... toothfish are released on research cruises, fish are retained in tanks for several hours post-tagging to ... , cutting off the snood and removing the hook. Once on board, fish are checked for damage and overall ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 279–289 : Autor(es): Agnew, D.J., J. Moir Clark, P.A. McCarthy, M. Unwin, M. Ward, L. Jones, G. Breedt, S. Du Plessis, J. Van Heerdon and G. Moreno

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

   define predator units. The derived conceptual model is then used to formulate an approach for developing ... local restrictions on harvesting are necessary, as well as the overall requirements for the monitoring ... the principles and approach required for developing small-scale management units to take account of ... predators’ needs when managing the fishery for Antarctic krill. It provides a theoretical foundation for ... conceptual model is then used to formulate an approach for developing fi sheries on prey species, notably ... restrictions on harvesting are necessary, as well as the overall requirements for the monitoring program ... of predators in an ongoing management framework for a fully developed fi shery (Constable et al ... been resolved, despite early consideration of the options that could be used to provide for an ...

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

6. Estimating krill recruitment and its variability

   for 2+ krill (the ratio of the number of two-year-old krill to the number aged two and above) from ... rate for 1+ krill (the ratio of the number of krill aged one year to the number of krill aged one year ... likelihood method is developed for the decomposition of krill density-at-length data into the proportion of ... and above) of 0.339 with a standard deviation (SD) of 0.100. The corresponding result for recruitment ... with R(t) estimated for both putative one- and two-year-old age classes. above data, and four age ... classes in fitting to two- densities for each length calculated using year-old and above. equation (6 ... method for determining numbers-at-age is based on the decomposition of length frequency distributions ... estimated in fitting the model, and ensures an orderly relationship between the variance estimated for ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 55–69 : Autor(es): de la Mare, W.K

7. Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass

   needs to be estimated prior to each trial in order for it to be based on the parameters for that trial ... method for correcting this bias in the level of escapement. The GYM uses an unbiased estimate of the ... median unexploited spawning biomass Abstract / Description:  Two Monte Carlo simulation models, the krill ... for estimating yields according to decision rules that relate spawning stock status to the median ... and for three levels of y - 0.15, 0.2 and 0.4. Projections for 20 years and 30 years were undertaken ... perio . Table 2: Escapement of spawning biomass at the end of 20 and 30-year projections for different ... spawning biomass after 20 and 30 years relative to median So in each run with no fishing was 1.099 and ... : The probability of depleting the spawning biomass during 20-year projections for different levels of y ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 1–8 : Autor(es): Constable, A.J. and W.K. de la Mare

8. Do krill and salps compete? Contrary evidence from the krill fisheries

   / Description:  Salp by-catch and krill discolouration ('green' krill) caused by active feeding on ... krill in the catches was evident when both salps and krill were taken together. In the Livingston Island ... clear relationship was observed in the Elephant Island area. Possible reasons for these phenomena are ... Recently, an hypothesis of competition for primary production between salps and krill has been proposed ... salp densities is shown in Figure 5. The estimates for each area were standardised to February and an ... salps, however, indicates an effect on availability of phytoplankton to krill. In the Elephant Island ... be active feeding grounds for krill, which effectively filters particles larger than 20 pm (Meyer ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 205–216 : Autor(es): Kawaguchi, S., T. Ichii, M. Naganobu and W.K. de la Mare

9. Low breeding success of the Adélie penguin at Béchervaise Island in the 1998/99 season

   , foraging trip duration and diet suggests that the death of chicks during the guard stage was due to an ... fewer local trips and both sexes spent longer at sea than in years of higher breeding success. Meal ... ), both of which can the need for increased knowledge on the biology of result in reduced breeding ... years. Two other years, 1994/95 and 1995/96, also experienced low breeding success rates of 0.05 and ... identification; the bands were regularly loosened for flipper growth. Individuals were weighed on a five-day ... side behaviour have been previously determined (Clarke of the island on 20 February. This breakout was ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 151–167 : Autor(es): Irvine, L.G., J.R. Clarke and K.R. Kerry

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

    derived for both sexes combined are: L ∞ 22.1 cm SL; K 0.167 y –1; t 0 –0.4 years. Parameter estimates ... -growing with a moderate longevity; the maximum estimated age was 14.3 years. Von Bertalanffy parameters ... were also derived for the sexes separately. Female Antarctic silverfish appear to reach a larger size ... about two-thirds of the sampled fish could not be sexed. Precision estimates and age bias plots ... cognition due to being stored frozen for almost two years. SL has been used for all analyses as caudal ... 25 0 3 6 9 12 15 Age (years) St an da rd le ng th (c m ) 0 5 10 15 20 25 0 3 6 9 12 ... age­frequency histogram for 304 Antarctic silverfish sampled from the Ross Sea. 0 10 20 30 40 50 1 2 3 4 ... 5 6 7 8 9 10 11 12 13 14 Age (years) Fr eq ue nc y Age (years) Fr eq ue nc y 50 40 30 20 ...

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

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