What season is it anyway? Circadian tracking vs. photoperiodic anticipation in insects.

Abstract excerpt

The daily rhythm of 24 h and the annual rhythm of 12 mo constitute the 2 major, highly predictable rhythms of the biosphere. The internal circadian clock enables organisms to track daily changes in their environment; the photoperiodic timer, alone or in concert with a circannual clock, enables organisms to anticipate and prepare in advance for seasonal changes in their environment. The circadian clock entrains to...

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