Lateralization of pectoral stridulation sound production in the channel catfish

Physiol Behav. 1996 Sep;60(3):753-7. doi: 10.1016/0031-9384(96)00092-3.


Sounds of the channel catfish Ictalurus punctatus were found to consist of a rapid series of pulses produced by rubbing a ridged process on the first pectoral spine against the rough surface of a groove in the pectoral girdle during fin abduction. Although sounds can be made with either fin, approximately half of the individuals exhibited a fin preference, and 90% of these preferred the right fin. Unlike examples of handedness in other invertebrates and fishes, this preference is not simply a matter of anatomical asymmetry, but as in humans, reflects a preference between two equally developed limbs.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Extremities / physiology*
  • Functional Laterality / physiology*
  • Ictaluridae
  • Sound*