How boat strike injuries affect manatee welfare and what conservation policies have reduced injury rates in Florida and beyond.
Manatee welfare is profoundly affected by human watercraft use. Strike injuries range from superficial lacerations to catastrophic propeller trauma causing death from blood loss, organ damage, or infection. Animals surviving strikes often carry permanent injuries affecting locomotion and feeding. The chronic nature of repeat strikes on the same identified individuals is particularly troubling, as some manatees bear dozens of propeller scar clusters. Expanding slow-speed zones, enforcing existing regulations, and addressing nutrient pollution driving harmful algal blooms represent the highest-impact welfare interventions.