Fig. 8

Representative examples of unusual dive types. a, b Representative examples from translocated seal #2 of unusual dive types (indicated via arrows) occasionally observed associated with the first dive of a “ping on” phase of the sonar tag’s duty cycle. In some instances, the tag commenced pinging during a dive and the animal immediately dived deeper. In other instances, the tag commenced pinging as the animal was surfacing and the animal aborted its ascent and dived deeper again. After these unusual dives, normal diving behavior resumed. c Example of a prolonged period spent at the surface by seal #3, initiated while the tag was not pinging and then punctuated by a deep dive after the tag commenced pinging