Sea turtles are accidentally caught in fishing gear in enormous numbers globally. Bycatch is a leading cause of sea turtle mortality with direct and severe welfare consequences.
Sea turtle bycatch welfare costs include drowning, hook injuries, entanglement-related injuries, and stress from capture. Turtles that drown in trawl nets during extended tow times experience death by asphyxiation. Hook-caught turtles in longline fisheries suffer from esophageal or intestinal injuries from ingested hooks. Observer programs and de-hooking training help fishing crews release captured turtles alive, reducing mortality. The Turtle Excluder Device is one of the most successful welfare-conservation technologies in fisheries management, dramatically reducing bycatch at minimal cost to shrimp catch. Ongoing gear innovation continues to improve bycatch reduction across different fishery types and sea turtle species.