Tserpes George, Nikolioudakis Nikolaos, Maravelias Christos, Carvalho Natacha, Merino Gorka
Hellenic Centre for Marine Research, Institute of Marine Biological Resources and Inland Waters, Heraklion, Greece.
Hellenic Centre for Marine Research, Institute of Marine Biological Resources and Inland Waters, Athens, Greece.
PLoS One. 2016 Dec 29;11(12):e0168694. doi: 10.1371/journal.pone.0168694. eCollection 2016.
Management of the Mediterranean demersal stocks has proven challenging mainly due to the multi-species character of the fisheries. In the present work, we focus on the multi-species demersal fisheries of the Aegean Sea (eastern Mediterranean) aiming to study the effects of different management measures on the main commercial stocks, as well as to explore the economic viability of the fisheries depending upon these resources, by means of simulated projections. Utilizing the limited available data, our results demonstrated that, under the current exploitation pattern, the economic viability of the fleets is threatened, particularly if fuel prices increase. Additionally, the biological targets set for the most exploited species, such as hake, will not be met under the current management regime. The projections also showed that the only management scenario under which both resource sustainability and economic viability of the fisheries are ensured is the decrease of fleet capacity in terms of vessel numbers. In this case, however, measures to support the fisheries-dependent communities need to be implemented to prevent the collapse of local economies due to employment decrease. Scenarios assuming selectivity improvements would be also beneficial for the stocks but they showed low economic performance and their application would threaten the viability of the fleets, particularly that of the trawlers.
地中海底层鱼类资源的管理已被证明具有挑战性，主要原因是渔业具有多物种特征。在本研究中，我们聚焦于爱琴海（地中海东部）的多物种底层渔业，旨在通过模拟预测研究不同管理措施对主要商业鱼类种群的影响，以及探讨依赖这些资源的渔业的经济可行性。利用有限的可用数据，我们的结果表明，在当前的开发模式下，船队的经济可行性受到威胁，特别是如果燃料价格上涨。此外，在当前管理体制下，为诸如无须鳕等最常捕捞物种设定的生物学目标将无法实现。预测还表明，确保渔业资源可持续性和经济可行性的唯一管理方案是减少船队船只数量方面的能力。然而，在这种情况下，需要实施支持依赖渔业的社区的措施，以防止因就业减少导致地方经济崩溃。假设选择性得到改善的方案对种群也将有益，但它们显示出较低的经济表现，其应用将威胁船队的可行性，特别是拖网渔船的可行性。
