Catch dynamics and management perspectives of mangrove crabs and fishers in the Baturusa river Bangka Island - Indonesia

Abstract Mud crabs ( Scylla spp.) are important fisheries resources in mangrove and estuarine ecosystems, supporting both ecological functions and coastal livelihoods. Yet, overfishing, habitat degradation, and weak governance threaten their sustainability. This study presents one of the first integrated assessments of mud crab fisheries in the Baturusa River Basin, combining biological analyses of catches and local ecological knowledge from fishers. Seasonal patterns were observed, with early-year catches dominated by small individuals, mid-year yields including large, potentially spawning females, and overall declining abundance of large crabs. Fishers corroborated these trends and highlighted mangrove loss, reduced crab availability, and lower market prices as major concerns. Integrating scientific and local knowledge provides a robust framework for adaptive, participatory management strategies that protect vulnerable crabs, restore mangrove habitats, and sustain both fishery productivity and the livelihoods of coastal communities.