Fisheries management and biodiversity conservation in the Mediterranean policy integration: how far are we from policy coherence?

Introduction The Mediterranean Sea is one of the world's most extensive biodiversity hotspots, yet its biodiversity is increasingly degraded due to environmental pressures and socio-economic activities, particularly fishing. Although a comprehensive policy framework exists to balance socio-economic needs with environmental protection, tensions persist due to limited integration among relevant policies and institutions. Mediterranean fisheries provide substantial socio-economic benefits, but overfishing remains a critical challenge. Against this background, this paper examines the integration of marine environmental and fisheries policies in the Mediterranean. Methods The study adopts a multi-scale case study approach, covering the full Mediterranean regional level and two national contexts: the Italian North Adriatic and the French Provence-Alpes-Côte d'Azur region. It employs a mixed qualitative methodology combining literature and policy reviews with semi-structured interviews, focus groups, and ethnographic research. The analysis focuses on coherence between European Union and regional Mediterranean policies, as well as their implementation at the national level in French Mediterranean and Italian northern Adriatic waters. Results The analysis identifies key challenges in policy alignment and persistent tensions between biodiversity conservation and fisheries management at the policy level. Both the EU's Common Fisheries Policy and the General Fisheries Commission for the Mediterranean incorporate environmental objectives and coordinate with environmental policies and institutions. However, this coherence at higher policy levels diminishes during implementation due to entrenched sectoral silos, power dynamics, varying levels of political will, and differences in available funding. Discussion These findings highlight ongoing difficulties in achieving effective marine policy coherence in the Mediterranean. The dilution of high-level policy alignment during implementation underscores the need for stronger enforcement, enhanced cross-sectoral coordination at both institutional and stakeholder levels, and more adaptive governance mechanisms. Addressing these issues is essential to better safeguard Mediterranean biodiversity while balancing socio-economic objectives.