Shearwaters and petrels are caught in longline fisheries in large numbers, causing significant welfare harm and population-level impacts.
Shearwaters and petrels caught on longline hooks drown or sustain hook injuries that prevent flight and diving. Those released alive often die from injuries or cannot resume normal foraging. Line-setting in darkness and weighted lines that sink hooks rapidly before birds can reach them are effective mitigation measures that reduce both bycatch and welfare harm.