''Co-management'' is among several slogans used to indicate a dissatis
faction with present systems and a movement to more decentralized syst
ems of marine resource management. The authors note the necessary dist
inction between decentralization and participatory management and use
comparative analyses of case studies of fisheries management systems i
n Scandinavian and North American countries and New Zealand to explore
potentials for both decentralization and delegation of authority in f
isheries management. The article focuses on issues of representation,
domain, and communication in the design of fisheries management system
s. It notes the value of the concept of subsidiarity, recently adopted
in the process of European integration, and raises the question of so
urces of more ''communicative rationality'' in the social and politica
l processes surrounding fisheries management.