Author(s): Z.N. Mahmoud and I.B. Wilson
Article publication date: 1987-04-01
Vol. 5 No. 1 (yearly), pp. 103-111.
141
Keywords
parietal eye, testicles, lizards.
Abstract
The effects on exposure to light of shielding parietal eye and of parietal ectomy on testicular activity were investigated in Chalcides ocellatus. Differences between the means of the numbers of lizards exposed to light after shielding their parietal eyes and of control animals was not significant (P> 0.1). There was a significant variation (P< 0.7) however, in the numbers of animals exposing themselves to light at different hours of the day, but no significant difference was obtained between the sums of the daily counts (P> 0.05). Histological assessment of testicular activity showed that neither the parietal ectomized nor the control lizards performed better than one another