, Volume 39, Issue 10, pp 1101–1102 | Cite as

Photoperiodicity in the male rosefinch

  • V. Kumar
  • P. D. Tewary
  • P. M. Tripathi
Short Communications Physiology, Pathophysiology


In male rosefinches (Carpodacus erythrinus) 12 h non-stimulatory photoperiods (12L∶12D) were as effective in stimulating testicular recrudescence, as were long photoperiods (18L∶6D) when presented as several intermittent symmetrical photoperiods. The results are discussed with regard to the hypothesis that photoperiodic effects in birds are mediated by circadian rhythms.


Circadian Rhythm Photoperiodic Effect Testicular Recrudescence Carpodacus Erythrinus 
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Copyright information

© Birkhäuser Verlag 1983

Authors and Affiliations

  • V. Kumar
    • 1
  • P. D. Tewary
    • 1
  • P. M. Tripathi
    • 1
  1. 1.Department of ZoologyBanaras Hindu UniversityVaranasi(India)

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