Humpback whale populations have recovered remarkably from the brink of commercial whaling extinction, offering lessons for marine conservation while new threats including entanglement and ship strikes emerge.
Humpback whale recovery demonstrates that meaningful conservation action can reverse even severe population declines. However, recovered populations face new welfare threats that were irrelevant when numbers were critically low. Fishing gear entanglement causes prolonged suffering - entangled whales can carry gear for months, experiencing chronic pain and impaired feeding before either escaping, being disentangled by response teams, or dying. Vessel strikes cause immediate trauma or death. The welfare of individual whales in recovered populations matters alongside population-level conservation. Whale entanglement response networks represent welfare intervention at the individual level, while ropeless fishing gear and vessel speed restrictions address the systemic causes.