Suppression of locomotor activity in sparrows by treatment with melatonin

Robert C. Hendel, Fred W. Turek*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


The continuous administration of melatonin via intraperitoneally placed Silastic capsules resulted in a clear reduction in the total amount of perch hopping activity recorded from sparrows maintained on either LD 3:21 or LD 8:16. Removal of the melatonin-filled capsules restored the level of locomotor activity to that seen prior to capsule implantation. These results, in conjunction with a previous study demonstrating that melatonin can alter the circadian rhythm of locomotor activity in sparrows, suggest that the pineal product melatonin plays a role in both the timing and the amount of activity expressed throughout the activity-rest cycle in birds.

Original languageEnglish (US)
Pages (from-to)275-278
Number of pages4
JournalPhysiology and Behavior
Issue number2
StatePublished - Aug 1978


  • House sparrows
  • Locomotor activity
  • Melatonin
  • Photoperiod
  • Pineal

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Behavioral Neuroscience


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