Manatees are gentle, slow-moving marine mammals that face chronic welfare threats from boat propeller injuries and loss of warm water refuges. Conservation measures directly translate into welfare improvements.
Manatee welfare is directly threatened by the combination of boat strike injuries, cold stress, and starvation. Propeller wounds cause acute pain and often take months to heal, during which time affected manatees experience chronic discomfort and impaired swimming. Cold stress syndromes occur when manatees become trapped in cold water after warm-water refuges fail — affected animals develop immune suppression, skin lesions, and lethargy. Seagrass decline from nutrient pollution forces manatees into suboptimal feeding areas where they may consume insufficient food for their metabolic needs. Enforcement of slow-speed zones, warm water protection, and water quality improvement are the most impactful welfare interventions.