The promise of machine learning in the Risso’s dolphin Grampus griseus photo-identification

Photo-identification (photo-ID) studies are strategic to fill the gap of knowledge of data deficient species such as Risso's dolphin. Unfortunately, the photo-ID process is very time consuming and strongly depends on the user-ability. Some photo-ID algorithms are available, which can, automatically or semi-automatically, find the closest match between the dolphin in the query and a catalogue of previously sighted dolphins. However the limitation...