Abstract
This thesis is part of the current scientific debate around the economic evaluation of ecosystem services provided by marine protected areas in developing countries. Using the contingent valuation method, it focused on the analysis of the Mauritanian population's perception of ecosystem services provided by the marine protected area of Banc d'Arguin National Park in Mauritania and the value that this population agrees to pay to maintain the supply of these services in its current state. Through the analysis of the results of three surveys conducted at the PNBA (local level), Nouakchott (adjacent zone) and Tidjikja (inland), the thesis discusses the impact of distance, in the sense of the remoteness and the time required to access the MPA, both on the perception of the ecosystem services provided by the PNBA and on the Willingness To Pay for its conservation.In addition, it discusses the applicability of the contingent valuation method in developing countries and proposes some improvements to the survey protocol to enhance the reliability of the results.