Grey Seal, Halichoerus: Echolocation Not Demonstrated
Active echolocation by pinnipeds has been claimed by at least one investigator (Poulter, 1963), but disputed by others (Schusterman, 1967). The grey seal produces clicks. Its underwater hearing is fairly sensitive in the ultrasonic regions important for echolocation in bats and porpoises, and considering the natural environment of the species, we suspected that it used active echolocation.
KeywordsCorrect Response Target Strength Grey Seal Passive Detection Forced Choice Test
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- Poulter, T. C., Sonar signal of the sea lion, Science 139:753.Google Scholar
- Schusterman, R. J. 1967, Perception and determinants of underwater vocalization in the California sea lion. In: R. G. Busnel (Ed.), Animal Sonar Systems, Vol. 1. Laboratoire de Physiologie Acoustique, Jouy-en-Josas, France, 535–617.Google Scholar