Evidence for a circadian component in the photoperiodic mechanism of the blackheaded bunting, Emberiza melanocephala
β Scribed by Tewary, P.D.; Kumar, Vinod
- Book ID
- 122911414
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 556 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0378-4320
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Three experimental protocols were employed to clarify whether the circadian system is involved in photoperiodic time-measurement in the blackheaded bunting, Emberiza melanocephala. In a single-pulse paradigm, one 8-h light pulse was delivered at different times to groups of birds across three days o
## Abstract The present study was designed to investigate the photoperiodic responses of blackheaded buntings to various Tβphotocycles [T =the period length of light:dark (LD) cycle]. Two series of experiments were performed. In series I, groups of buntings (n =8β12) were exposed to LD cycles of 22