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The complementary use and transfer of empirical and scientific knowledge are essential for the holistic and sustainable management of fishing resources. To understand how both types of knowledge are transferred in fishing communities in three regions of Mexico, we conducted 120 in-depth interviews with young people, adults, and older adults who participated in various activities within fishing value networks. During the interviews, we identified who participated in transferring knowledge within communities, what lessons were passed on, what knowledge has been lost, and what scientific topics are known within the communities. We also investigated the sector’s most used means of communication to further explore the transfer of scientific and technical knowledge and the fundamental roles of external actors in transferring knowledge within communities. The information was coded, categorized, and analyzed for each question. The interviewees valued the continuity of inheriting traditional knowledge, which included teaching practical skills, such as fishing techniques and navigation, and transmitting values, traditions, and ways of understanding and relating to the marine environment. The interviewees perceived knowledge transfer as a bidirectional exchange of knowledge, ideas, and practices among generations. Furthermore, they recognized the value of external actors with scientific and technical knowledge in promoting innovation and adapting to new challenges. The combination of knowledge and perspectives enriches fisheries management and marine environmental conservation. Promoting the transfer of traditional and scientific knowledge is fundamental to building a future where fishing and marine life coexist in harmony and prosperity. The responsibility of supporting this integration falls on fishing communities and external actors. Working together in this collaborative learning process is the key to achieving sustainable resource management and ensuring the continuity of this valuable tradition for future generations. In doing so, these communities’ cultural and ecological richness can be preserved, ensuring a lasting balance between people and the sea. 

The costs and benefits of customary top-down Marine Protected Areas (MPAs) have been studied at length. But the costs and benefits of community-based MPAs –an increasingly common tool in conservation and fisheries management– remain understudied. Here, we quantify the operational costs of maintaining community-based MPA monitoring programs in nine small-scale fishing communities in Mexico. We then compare these costs to the potential extractive use value of invertebrate and fish biomass contained in the reserves. We find that the annual monitoring costs (median: 1,130 MXN/ha; range: 23-3,561 MXN/ha) represent between 0.3% and 55% of the extractive use value of the biomass contained in the reserves (median: 21.31 thousand MXN/ha; 5.22 - 49/12 thousand MXN/ha). These results suggest that the direct monetary benefits of community-based marine conservation can outweigh the costs of monitoring programs, providing further support for these types of management schemes. While further research should explore other mechanisms that would allow fishers to leverage the non-extractive use value of reserves (e.g., tourism) or the non-use value (i.e.existence value of biodiversity) to sustainably finance their conservation efforts, a stop-gap measure to ensuring long-term monitoring costs are covered might include limited extractive use of resources contained in the reserves. 

As a member of the “High Level Panel for a Sustainable Ocean Economy”, Mexico has committed to expand community-based marine conservation. We draw from more than two decades of experience to outline how existing resources may be leveraged to help inform the country’s ambitious conservation plans. A total of 514.12 km 2 have already been protected under community-based marine reserves. 14 years of ecological survey data, more than 130 community surveyors, more than one hundred publications, and an entire digital infrastructure provide a solid platform on which to continue building the community-based marine conservation movement. Parallel and complimentary efforts have advanced regulation, action, data access and transparency, and coordination. Future interventions should innovate, but leverage existing resources and continue to involve communities.