Fig. 2.
Locomotor activity (top) and body temperature (bottom) records of an individual ofI. iguana (IO 16) showing effects on these rhythms of sham PAR-X and sham PIN-X in constant temperature and darkness. The arrows indicate the days on which the animal was released in DD, sham PAR-X, and sham PIN-X. Estimates of the free-running period for these data sets are reported in Tables 1 and2.