Psychobiology of Lizard Reproduction 
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■ Field control 
O Intact male 
• Castrated male 
A Castrated male with 
testosterone propionate 
A Castrated male with 
cholesterol 
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2 3 
Weeks 
Figure 9. Patterns of environmentally induced ovarian recrudescence exhibited by winter-dormant Anolis 
carolinensis housed with castrated males implanted with testosterone propionate or cholesterol. Sample 
sizes shown by each Point (redrawn from Crews, 19746). 
Results from this study indicated that the 
rate of environmentally induced ovarian 
growth among females housed with blue- 
dewlapped males was comparable to that 
shown by females housed with normal red- 
dewlapped males (Fig. 11). On the other 
hand, females housed with hyoidectomized 
males exhibited a significantly less rapid rate 
of OR which was almost identical to that of 
females exposed to castrated males. 
In the second experiment on the role of 
these various components in mate selection, 
females were exposed first to a courting red- 
dewlapped male to determine if they were 
receptive. Sexually receptive females were 
then tested with a courting hyoidectomized 
male followed by a similar mating test with 
a blue-dewlapped male. Results from these 
tests revealed that receptive females do not 
respond sexually to the courtship of hyoidec- 
