Summary of results for the four photoperiodic regimens for lizards displaying significant rhythmicity.

Percent rhythmic indicates the percentage of rhythmic lizards. τ represents the period, φ the acrophase, rm the average reflectance, A(r) the reflectance amplitude, δm the average standardised difference between the total reflectance in near-infrared (700–2150 nm) and the total reflectance in ultraviolet-visible (300–700 nm), A(δ) the amplitude of δ, τ(φ) the time interval from 07∶00 to the acrophase, Δ(φ) the time interval from the beginning of the dark phase to the acrophase, τ1 the average time interval between the first local maximum reflectance higher than the average reflectance and the following first local minimum reflectance lower than the average reflectance, τ2 the average time interval between the first local minimum reflectance lower than the average reflectance and the following first local maximum reflectance higher than the average reflectance, τ+ the average time interval wherein the reflectance is higher than the average reflectance and τ- the average time interval wherein the reflectance is lower than the average reflectance. All the parameters are expressed as mean ± s.e.m. NA: not applicable.Summary of results for the four photoperiodic regimens for lizards displaying significant rhythmicity.