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In recent years, applications using mobile agents (MAs) in mobile ad-hoc networks (MANETs) are attracted. An information dissemination service is one of these applications. In this service, users can get local area information from an MA, which migrates from node to node within the local area. The system need not provide any server. Instead of servers, MAs collect local information and disseminate it. One of very important problems in such a service is to make MAs survive as long as possible in the service area. Several methods to manage mobile agents have been proposed. However, the migration algorithm for MA used in these studies is a simple one. In this paper, a new migration algorithm based on the predicted lifetime of MA is proposed. By computer simulation, the performance of the proposed scheme is evaluated.