... coastal fisheries management in Southeast Asia. Ocean & Coastal Management, Vol 27, No 3, pp. 143. [7] Ton That Phap, 2002. “Co-management in the planning of a waterway system for aquaculture”, ... exploitation and aquacultural activities in the lagoon. Among them, about 900 households live on the lagoon’s water surface [9]. Figure 1. Location map of the study area; arrow indicates Phu An ... multi-purposes, the total nitrogen (TN) level in several areas of the lagoon is higher than international standards [6, p.20]. According to American standard, total nitrogen (TN) applied to coastal water...