Estimation of the 2011 catch limit for mackerel icefish (Champsocephalus gunnari) in Subarea 48.3 using a length-based population dynamics model

A length based projection model is employed to estimate catch limits for the 2011/12 fishing season for Champsocephalus gunnari in CCAMLR sub area 48.3. The model is initialised using estimated numbers at length derived from survey length  density and biomass density data, removing the need for cohort identification associated with the age based projection model used in previous assessments. Application of the harvest control rule ensuring 75% escapement after a two year projection period yielded a total allowable catch of 2349 tonnes.