عنوان مقاله [English]
Abstract. The activity of cooperatives is one of the important activities of the fisheries sector and its knowledge performance and economic funds can be effective in deciding on investment in this sector as well as economic planning. The aim of this study was to determine the role of cooperatives in the optimal economic use of dual-purpose dams in aquaculture in Mazandaran province from 20 selected cooperatives in 2016-2017. To ensure the completeness of the questionnaire, before starting the main stages of the research, five units were randomly referenced and the questionnaire was reviewed and finalized with Cronbach's alpha coefficient. The results showed that the fishing industry of Mazandaran province is one of the productive activities and has an effective role in transforming the methods of exploiting provincial facilities. The comprehensive data analysis method presents the relative efficiency of each production point by calculating the ratio of the total weighted product to the total weighted input. According to the obtained average technical efficiency, it was found that most sealing cooperatives used inputs and facilities as efficiently as possible and according to the calculated average technical efficiency (above 83% on average), if these factors are used better, they can increase the technical efficiency of the units by 20.8%. In this regard, and based on the linear programming method provided for these units, it is possible to plan for the production and target values of each unit.