Imane Agmour is a PhD student in Applied Mathematics at Faculty of Sciences Ben M’sik, Hassan II University, Morocco. She is a Member of the Analysis, Modeling and Simulation Laboratory. Her research interests include complementarity problem, bio-economic models, variational inequalities, generalised nash equilibrium. She is an author of several research studies published at numerous international journals and conference proceedings.

Wind direction and wind speed are the most important parameters involved in the seiners’ fishing activity. The wind creates conditions that are favorable to fishing. In this work, we search to show the influence of the wind speed on the annual profit of purse seiners. We consider a bioeconomic model of marine populations exploited by purse seiners in the southern athletic zone of Morocco. This zone is characterized by major wind speed changes.

 

We calculate the fishing effort and the amount of catch that allows the seiners to have a maximum annual profit taking into account changes in wind speed in the reporting year and the sustainability of the marine populations stocks. We compare our results with those obtained by the" Institut National de Recherche Halieutique (INRH)" (National Institute of Fisheries Research). One of the key results of this study is the great difference seen between the monthly fishing efforts, the catches and the profits calculated under the two constraints: wind speed changes and biodiversity conservation, and those calculated under the only constraint of the biodiversity.