Applying a regional certification scheme for aquatic non-indigenous species fishery: the case of the Atlantic blue crab (Callinectes sapidus) in the northern Adriatic Sea

The Mediterranean Sea is considered the world’s most invaded marine region facing increasing threats from AIS due to rising temperatures and human-mediated introductions. This impacts biodiversity, fisheries, and local livelihoods. However, some of these invaders may hold economic potential to be exploited as new fishery resources. Supporting fishers harvesting Aquatic Invasive Species (AIS) with selective fishing methods will contribute to reduce the negative impacts driven by the increasing abundance of AIS (Azzurro et al. 2024). Fishers might also develop specific labelling requirements for edible species to enhance their perceived economic value and, consequently, increase the marketability of AIS. The present study aims to document, through local ecological knowledge (LEK), the Atlantic blue crab (Callinectes sapidus) fishery in a coastal lagoon of the northern Adriatic Sea where blue crabs captured using selective fishing gear (traps), developed to protect clam populations, are also sold on local market outlets. The case study, generating new knowledge on this invasive species, has also been used to evaluate whether it meets specific criteria to achieve the Adriatic Responsible Fisheries Management (ARFM) certification scheme, developed under the Interreg Prizefish project. The study also explores how adaptive harvest strategies could promote responsible fishery, mitigate ecological damages and create economic opportunities thereby fostering a more structured approach to AIS management.