Seabirds including albatrosses, petrels, and shearwaters drown on longline hooks while attempting to take bait, with simple deterrent techniques capable of reducing bycatch by over 90% at minimal cost.
Seabirds drowned on longline hooks die from asphyxiation after diving to reach the bait. The drowning process takes minutes for a bird that can dive to considerable depths. The preventability of this mortality — with techniques that are cheap, available, and proven — makes every seabird bycatch death especially frustrating from a welfare perspective. Conservation and welfare converge here: the same interventions that prevent welfare harm also prevent extinction.