Click Sounds from Animals at Sea

  • William A. Watkins
Part of the NATO Advanced Study Institutes Series book series (volume 28)


Echolocation signals from passing cetaceans (Deliphinidae, Phocoenidae, etc.) at sea generally exhibit somewhat different characteristics from those of the same species in captivity that are involved in discrimination experiments in echolocation. Presumably, these differences are partly because the echolocation task at sea would have been primarily for orientation (as suggested by Norris, Evans, and Turner 1967; Norris 1969). Generally, the clicks from groups of cetaceans passing within a few meters of a hydrophone at sea are (1) relatively low frequency (rarely energy above 50 kHz from any species), (2) mostly low level, and (3) often at slow, variable repetition rates. Under these circumstances, the clicks may be used primarily in social contexts.


Killer Whale Harbor Porpoise Woods Hole Oceanographic Institution Echolocation Signal Hydrophone Array 
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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Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • William A. Watkins
    • 1
  1. 1.Woods Hole Oceanographic InstitutionWoods HoleMassachusettsUSA

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