Using small drones to photo-identify Antillean manatees: a novel method for monitoring an endangered marine mammal in the Caribbean Sea

A novel method using small drones to photo-identify Antillean manatees (Trichechus manatus manatus) has been successfully demonstrated, offering a promising tool for monitoring endangered marine mammals. The study, conducted between 2016 and 2017 in Belize's St. George’s Caye near the Belize Barrier Reef, captured high-resolution images of 17 identifiable individuals from 279 manatee sightings (245 adults, 34 calves). By analyzing distinct scars and markings acquired from watercraft injuries or other incidents, researchers created a catalog that enabled tracking over time, with 21% of adult manatees at the site proving photo-identifiable. This approach addresses long-standing challenges in monitoring underwater species in remote areas, providing insights into individual site fidelity, habitat use, and behavior. The method's applicability extends to clear, shallow waters globally, enhancing long-term conservation efforts for this vulnerable species.

Landeo-Yauri, S., Ramos, E., Castelblanco-Martínez, D., Torres, C., & Searle, L. (2020). Using small drones to photo-identify Antillean manatees: a novel method for monitoring an endangered marine mammal in the Caribbean Sea. Endangered Species Research, 41, 79–90. https://doi.org/10.3354/esr01007