Aquaculture in the Coastal Zone: Pressures, Interactions and Externalities

This chapter focusses on the way aquaculture interacts with other users of the coastal zone, and specifically the side effects (externalities) of these interactions. The DPSIR (Driving forces - Pressure - State - Impact - Response) paradigm is used here to explore the externalities problem and to suggest policy solutions. Two aspects of the problem are considered, on the one hand those externalities generated by coastal zone activities that affect aquaculture, and on the other those originating from aquaculture itself. Monetary valuation is one way to assess externalities, and an example is provided for shrimp farming in mangroves (see appendix). The benefits and risks of different strategies for policy solutions based on assessments of externali- ties are discussed.

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