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Pineal melatonin content in photoperiodically responsive and non-responsive phenotypes of deer mice
J L Blank1, R J Nelson, M K Vaughan
1Department of Biological Sciences, Kent State University, OH 44242.
Abstract:
1. The pineal melatonin content of photoperiod responsive and photoperiod non-responsive male deer mice was assessed. 2. Pineal melatonin content did not differ between short-day mice with regressed testes or those that maintained their reproductive systems. 3. These data suggest that differential phasing of melatonin release or post-pineal mechanisms are responsible for the differential responsiveness to day length among deer mice.