TY - RPRT TI - Automated detection, morphometric measurement, and size-class determination of harbor seals (Phoca vitulina) from UAV orthomosaics: a cascaded deep-learning pipeline with stratified validation across platforms, sensors, altitudes, and substrates AU - Usatov, I. AU - Burkanov, V. AU - Trukhanova, I. AU - Altukhov, A. AU - Bowker, A. AU - Nordstrom, C. AU - Tucker, S. PY - 2026 DO - 10.64898/2026.10.01.755886 UR - https://www.biorxiv.org/content/10.64898/2026.10.01.755886v1 ID - 10.64898/2026.10.01.755886 ER -