INTRASPECIFIC VARIATION IN LIZARD THERMOREGULATORY SET POINTS - A THERMOGRAPHIC STUDY IN PODARCIS-MURALIS

1. The mean temperatures at which lizards in an experimental arena cea sed basking beneath a tungsten bulb (T(move)) had a lower variance tha n mean temperatures when they returned (T(bask)). 2. Mean T(move) and overall mean surface temperatures of active lizards were significantly higher in the melanic subspecies Podarcis muralis marcuccii from Arge nterola Islet in the Tyrrhenian Sea than in the normally-coloured subs pecies P. m. brueggemanni from Florence, mainland Italy. 3. Heating ra tes of similarly-sized individuals of the two subspecies did not diffe r.