A comparison of two different methods to age mackerel icefish (Champsocephalus gunnari) at South Georgia

Age determinations estimated by means of otoliths and age classes derived from CMIX analysis have been compared in Champsocephalus gunnari using material collected around South Georgia during four Russian surveys in 1988, 1990, 2000 and 2002. Considerable differences in age estimates between the two methods were revealed. A number of suggestions including an Age Determination Worksop to be held in Kaliningrad in 2005 and the exploration of methods in addition to CMIX are made to reconcile some of these differences in the future.