Boat strikes are the leading human-caused mortality source for Florida manatees, causing acute traumatic injuries and slow deaths that are largely preventable through speed zone compliance.
Boat strike injuries cause acute, severe trauma - propeller cuts can be life-threatening and even non-lethal strikes cause blunt trauma that impairs swimming and feeding. The chronic nature of boat strike mortality means that speed zone compliance has immediate welfare implications for individual manatees encountered by every boater. Manatees that survive propeller strikes carry permanent scars and may have reduced swimming efficiency. The prevention tool is simple: slowing down in manatee zones requires only compliance with posted speed limits, making this one of the most straightforward direct welfare actions available to recreational boaters.