Figure 2.

Mean (±s.e.) number of tongue-flicks (TF) directed to swabs by female lizards in response to cotton-tipped applicators bearing: (a) deionized water, or scent from femoral secretions of control males (C-males), or males that received an experimental supplementation of dietary vitamin D (S-males); (b) dichloromethane (DCM), cholesterol (chol), or cholesta-5,7-dien-3-ol (proD3), all dissolved in DCM; and (c) two different concentrations of cholesta-5,7-dien-3-ol dissolved in DCM and mixed with cholesterol.