CESAER, INRAE, L'Institut Agro Dijon, Univ. Bourgogne Franche-Comté, 26 Bd Docteur Petitjean, F-21000, Dijon, France.
Bordeaux School of Economics, Univ. Bordeaux, Avenue Léon Duguit, F-33608 PESSAC, France.
J Environ Manage. 2023 Apr 15;332:117356. doi: 10.1016/j.jenvman.2023.117356. Epub 2023 Jan 25.
A number of freshwater fish particularly migratory species are currently under threat. As the pressure of recreational fishing has intensified, this activity needs to be more regulated to halt the decline of threatened fish stocks. This paper presents results of an economic valuation study of anglers' preferences for a change in the rules applying to Twaite shad fisheries in south-western France. Twaite shad has become a "near-threatened" species, with the same IUCN status as the Atlantic salmon. As shad recreational angling continues to be open access, new regulations are required to limit recreational harvest in support of a management strategy to prevent stock reduction even to foster stock recovery. We combined a deliberative choice experiment with open group discussion to obtain an in-depth understanding of anglers' preferences between two types of traditional regulatory instrument - a license fee or a bag limit. The closure of the fishery served as the reference scenario. The results indicate that the majority of anglers were aware of the decline of Twaite shad stocks. The recreational value of the species remains high, especially for those who already target migratory species. Although econometric estimations show that there are heterogeneous preferences across anglers, there were support for a change toward a bag limit, and an aversion for a high-priced licence fee. The findings also provided two key insights to improve recreational fishing management and preservation policy for threatened species. The communication of observation data on fish stock could not be considered as a sufficient ecological information to ensure threatened species monitoring leads to an effective co-management with anglers' community. Anglers' aversion to loss can be seen as a behaviour mechanism towards the preservation of the species rather than to its use.
一些淡水鱼类，尤其是洄游鱼类，目前正面临威胁。随着休闲渔业压力的加剧，这种活动需要更加规范，以阻止受威胁鱼类种群的减少。本文介绍了一项经济价值评估研究的结果，该研究评估了法国西南部特瓦特鲱渔业规则变化对垂钓者偏好的影响。特瓦特鲱已成为一种“近危”物种，其国际自然保护联盟濒危物种红色名录等级与大西洋鲑鱼相同。由于鲱鱼休闲垂钓仍为开放获取，需要新的规定来限制休闲捕捞，以支持一项管理策略，防止种群减少，甚至促进种群恢复。我们结合了审议式选择实验和公开小组讨论，以深入了解垂钓者对两种传统监管工具的偏好，即许可证费或渔获量限制。关闭渔业作为参考情景。结果表明，大多数垂钓者已经意识到特瓦特鲱鱼种群的减少。该物种的娱乐价值仍然很高，特别是对于那些已经瞄准洄游物种的垂钓者。尽管计量经济学估计表明垂钓者之间存在异质偏好，但他们支持转向渔获量限制，并反对高价许可证费。研究结果还为改善休闲渔业管理和保护受威胁物种的政策提供了两个关键见解。对鱼类种群观察数据的传播不能被视为确保受威胁物种监测与垂钓者社区有效共同管理的充分生态信息。垂钓者对损失的厌恶可以被视为保护物种的行为机制，而不是对其使用的厌恶。
