Florida manatees face severe threats from boat propeller strikes, cold stress, and habitat loss. Individual welfare suffers directly from human activities that conservation interventions can address.
Manatee welfare is directly shaped by human activities that can be regulated and reduced. Boat propeller strikes cause acute, severe injuries — deep lacerations, broken ribs, and sometimes fatal wounds. Animals that survive carry scars and injuries that cause chronic pain and reduced mobility. Cold stress causes large-scale mortality events when warm water outflows from power plants shut down during cold snaps, and manatees that have come to depend on these artificial warm spots cannot relocate in time. Seagrass loss from nutrient runoff reduces food availability, forcing manatees to expend more energy foraging. Each of these threats is addressable through specific policy interventions: boat speed limits, warm-water alternatives as power plants close, and water quality improvements.