Measuring Environmental Efficiency and Emission of Trout Pollutants (Case study; Fars province)

Document Type : Research Paper


1 Department of Agricultural Economics, Faculty of Economics and Development, University of Tehran

2 Tehran university


Despite the advantages of the fish farming industry, if the production factors are not used properly, the environmental effects will be significant. Therefore, measuring the amount of pollutants emitted and assessing the environmental efficiency is very important and will help to provide solutions to reduce the amount of pollutants and preserve the environment and natural resources. So, the present study was conducted to measure the emission of pollutants and the environmental efficiency of trout farming in Fars province. In the production cycle of 2019-20, 31 questionnaires have been collected from trout farming in Fars province. The emission of environmental pollutants was measured based on indirect methods. According to the results, per ton of produced fish, an average of 46.10 kg of nitrogen, 3.78 kg of phosphorus and 35.69 kg of carbon were released into the environment. Environmental efficiency was calculated based on the SBM-DEA approach and the results indicate that the fish farms were not efficient on average. It is suggested that the emission of these pollutants be evaluated annually by the relevant institutions and reduced the emission of environmental pollutants as much as possible through incentive and deterrent policies. This reduces environmental effects and increases environmental efficiency.