The study on negative externalities of the coastal ecosystem with categories of serious affected, medium affected and low affected fishermen and also positive externalities of coastal tourism was taken up in the cuddalore district of Tamil Nadu. The gross and net income was coincided with the pollution intensity and also the fish catch was varied with pollution intensity. The resource use efficiency of total production and Sardinella longiceps and Rastrelliger kanagurta species revealed the differential influence of fuel cost, numbers of fishermen and maintenance cost and depreciation cost of...