How ship strikes cause significant fin whale mortality and what vessel management measures can reduce this welfare harm.
Ship strike mortality causes acute traumatic death or severe injury to fin whales in ocean regions where shipping traffic has grown dramatically. The welfare harm of fatal ship strikes is immediate — severe blunt force trauma causing rapid death or incapacitation. Non-fatal strikes cause injuries including fractured skulls, spinal injuries, and propeller lacerations that impair normal function and cause prolonged suffering. Speed restrictions in designated whale habitats and seasonal routing measures have demonstrated measurable reduction in strike risk. These measures require international shipping industry cooperation but are technically feasible. The scale of global shipping makes this a welfare issue requiring systemic rather than individual vessel solutions.