The engagement of the fishers and other stakeholders in the management of the resources is considered the key ingredient for a good fishery governance.

The stalked barnacle Pollicipes pollicipes can be considered the most important economic resource on rocky shores of northern Spain and continental Portugal. This species is highly prized as food and it is heavily exploited.

The main objective of the present study was to evaluate the temporal variation in the perception of P. pollicipes fishers at Berlengas Nature Reserve (RNB, the first area in Portugal to be managed for this fishery, since 2000) regarding the state of the fishery and the state of the management, and the implementation of a co-management system applied to the harvesting of this resource at RNB.

The fishers’ perception was evaluated by individual and direct interviews to professional P. pollicipes fishers with license​ to harvest at RNB, performed in 2005, 2013 (past studies) and 2018 (present study).

The perception of the fishers about the state of P. pollicipes revealed an overall negative tendency of this resource at RNB, as they considered that the amount and size of the barnacles had decreased over time, and the quality remained the same. Most fishers also considered that P. pollicipes are being overexploited at RNB.

The state of the management was defined as acceptable, as a large majority of the fishers agreed with most of the management measures, except for the spatial closures. However, their sense of nonfulfillment was high regarding most management measures in practice.

Finally, an increasing percentage of the fishers agreed with the implementation of a co-management system applied to barnacle harvesting at RNB. This management shift might bring benefits perceived by the fishers as a better state of the resource, a more sustainable fishery management and an increase of the economic value of the resource.

渔民和其他利益相关者参与资源管理被认为是良好渔业治理的关键要素。

在西班牙北部和葡萄牙大陆的多岩石海岸上，藤壶茎杆柄茎杆菌被认为是最重要的经济资源。该物种被高度珍视为食物，并且被大量利用。

本研究的主要目的是评估在感知时间变化P. pollicipes有关渔业的状态下Berlengas自然保护区渔民（RNB，在葡萄牙的第一区域为这个渔业管理，自2000年以来）和管理的状态，以及用于在RNB收集此资源的联合管理系统的实施。

在2005年，2013年（过去的研究）和2018年（本研究）中，通过对具有RNB捕捞许可的专业P. pollicipes渔民进行的单独和直接访谈来评估渔民的感知。

渔民对P. Policipes状况的看法揭示了RNB上该资源的总体消极趋势，因为他们认为藤壶的数量和大小随时间减少，并且质量保持不变。大多数渔民还认为，RNB过度利用了P. Policipes。

管理状态被定义为可以接受，因为除了空间封闭以外，绝大多数渔民都同意大多数管理措施。但是，对于大多数实践中的管理措施，他们的不满意感很高。

最后，越来越多的渔民同意将联合管理系统应用于RNB的藤壶捕捞。这种管理上的转变可能会带来渔民认为更好的资源状况，更可持续的渔业管理以及资源经济价值的增长。