Photoperiodic time measurement in seasonal reproduction of the weaver bird (Ploceus philippinus)
β Scribed by Sushama Pavgi; Asha Chandola
- Book ID
- 113158022
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 558 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0016-6480
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## Abstract Indian weaver birds, __Ploceus philippinus__, are seasonal breeders and breed during June to August. Exposure of the adult male birds to long photoperiod (18Lβ6D) during their nonbreeding period (NovemberβDecember), causes gonadal development and external changes (plumage and bill colou
Seasonal gonadal regression in the photoperiodic weaver finch Ploceus philippinus occurs in the late summer despite the presence of long days. Earlier studies indicated a decline in photosensitivity in late summer, which might explain the failure of birds to respond to long days, resulting in gonada
## Abstract In the present study, we asked the question whether physiological responses to day length of migratory redheaded bunting (__Emberiza bruniceps__) and nonmigratory Indian weaver bird (__Ploceus philippinus__) are mediated by the daily rhythm of melatonin. Melatonin was given either by in