This paper investigates how data on, or related to, reproductive performance of seabird and seal predators,collected as part of the CCAMLR Ecosystem Monitoring Program (CEMP) could be used in the management, by CCAMLR, of commercial fisheries. It reviews reasons why it is important for CCAMLR formally to use such data in its fishery management operations and discusses the constraints inherent in the CEMP data, both from predator monitoring and harvesting perspectives. An outline of a specific approach is provided, involving an assessment procedure and recommendations for management action. The three elements of the assessment are determining the magnitude and significance of changes in individual parameters, evaluating overall patterns of change within species, sites and areas and reviewing factors potentially influencing or correlated with the changes. The relative merits and feasibilities of recommendations for restrictions on the magnitude, timing and location of harvesting are reviewed,taking account of likely operational constraints on fisheries.