At present the krill fishery in the CCAMLR areas 48.1-48.4 is managed according to a “trigger level” which is calculated as the sum of maximum historical catches in the four subareas 48.1-48.4. When catches reach the threshold set for a subarea, fishery is closed. The trigger level for all four subareas combined is 620,000 tons. At present the fishery is carried out in three of these areas, 48.1-48.3, close to islands where the water is relatively shallow and krill swarm densities are high.
The total krill abundance in the four subareas was investigated based on a joint international acoustic CCAMLR survey in 2000 and first estimated to 44 million tons. An output of the AKES project was a corrected model for calculating biomass from acoustic recordings, and this contributed to the recalculation of total biomass to 60.3 mill tons by CCAMLR in 2010. Of the total biomass, a Total Allowable Catch (TAC) of 5.61 mill tons was derived. The TAC has at present no practical influence on the management regime, but CCAMLR is working towards a management system allowing for expansion of the fishery beyond the trigger level approaching the TAC.