Phase shift of the circannual reproductive rhythm in European hamsters by 2 days of long photoperiod. Monecke S, Malan A, Saboureau M, Pévet P. Journal Article 2010; 31(6): 738-742 PubMed PMID: 21196916 Keywords: Animals, Circadian Clocks:physiology, Circadian Rhythm:physiology, Cricetinae, Male, Photoperiod, Reproduction:physiology, Seasons, Time Factors,. Citation OBJECTIVES AND DESIGN: In European hamsters a circannual clock drives the seasonal changes in the reproductive state. Its resetting by pho..... Read abstract Full text PDF