Optomotor responses of three congeneric gekkonid lizards having different daily activity times


  • *The fourth in a series based on Ph.D. thesis at The Hebrew University of Jerusalem, guided by Professor H. Mendelssohn (Tel Aviv University) and Professor Y. L. Werner.


Optomotor responses of three Israeli forms of Ptyodactylus hasselquistii, exhibiting differences in daily activity patterns, were studied. The number of reorientation movements was affected by drum velocity, stripe width and light intensity. The three closely related forms responded differently in correlation to their time of daily activity.