Geographic Variation in Ovarian Cycles and Clutch Size in Cnemidophorus tigris (Teildae)

Science  30 Dec 1966:
Vol. 154, Issue 3757, pp. 1671-1672
DOI: 10.1126/science.154.3757.1671


Ovarian cycles and individuual reproductive potentials of Cnemidophorus tigris in Colorado and Texas were studied by counts and measurementsv ments of yolked ovarian follicles, corpora lutea, and oviducal eggs. Colorado lizards lay one clutch averaging 3.4 eggs annually between May and August; Texas lizards average two clutches, each averaging 2.2 eggs, between April and mid-August.