Short Communications


, Volume 42, Issue 11, pp 1285-1287

First online:

Thalamic stimulation evokes sex-color change and gamete release in a vertebrate hermaphrodite

  • L. S. DemskiAffiliated withSchool of Biological Sciences, University of Kentucky
  • , J. G. DulkaAffiliated withSchool of Biological Sciences, University of Kentucky

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Sperm and egg release and sex-color patterns specific for the male and female phases of reproductive behavior were elicited by electrical stimulation in the thalamus of anesthetized sea bass. Thalamic switching of the sex-role specific motor activities in response to visual signals from the mate is considered an important feature regulating the complex mating activity of these simultaneous hermaphrodites.

Key words

Serranus subligarius color change sexual behavior sperm and egg release hermaphroditism thalamus brain stimulation hormones and behavior visual signals fishes