Abstract
activity. Others have previously noted variable activity patterns in response to changing temperatures. Ernst (1976) found that the mean daily time of activity became progressively earlier as the season advanced and temperatures increased, and in laboratory experiments the mean preferred temperature exhibited by C. guttata increased with photoperiod (Graham and Hutchison, 1979). In addition, Nemuras (1966) found that even nearby populations display slightly modified activity cycles in response to different habitats.
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