Grey Seal, Halichoerus: Echolocation Not Demonstrated

  • Bill L. Scronce
  • Sam H. Ridgway
Part of the NATO Advanced Study Institutes Series book series (volume 28)


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.


Correct Response Target Strength Grey Seal Passive Detection Forced Choice Test 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Poulter, T. C., Sonar signal of the sea lion, Science 139:753.Google Scholar
  2. 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

Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • Bill L. Scronce
  • Sam H. Ridgway

There are no affiliations available

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