, Volume 35, Issue 11, pp 1529–1530 | Cite as

Photoperiodic effects in the Djungarian hamster: one minute of light during darktime mimics influence of long photoperiods on testicular recrudescence, body weight and pelage colour

  • K. Hoffmann


In male Djungarian hamsters (Phodopus sungorus) short photoperiods (L/D 8/16) with additional 1- or 5-min light-pulses 8 h after light-off were as effective as long photoperiods (L/D 16/8) in stimulating testicular recrudescence, increase in body weight and moult into summer pelage. The results are discussed with regard to the hypothesis that the pattern of melatonin release from the pineal gland is important in mediating photoperiodic effects in mammals.


Colour Body Weight Melatonin Pineal Gland Short Photoperiod 
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Copyright information

© Birkhäuser Verlag 1979

Authors and Affiliations

  • K. Hoffmann
    • 1
  1. 1.Abt. AschoffMax-Planck-Institut für VerhaltensphysiologieAndechs(Federal Republic of Germany)

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