An acoustic biomass survey of krill will be conducted to determine the sustainable catch limit for this CCAMLR region. The area was last surveyed in 1981 and a precautionary catch limit of 450,000 tonnes of krill per year was established. Since that time, however, there have been changes in technology, the environment and the fishery. There is evidence from other areas of the Antarctic that considerable changes have been occurring in the marine ecosystem over the last 30 years. As an expansion in the krill fishery is anticipated, it is prudent to ensure that catch limits in the area of Australia's national interest are based on the best scientific information available.