This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by STEEL, E. Articles by HINDE, R. A. Search for Related Content PubMed Articles by STEEL, E. Articles by HINDE, R. A.

INFLUENCE OF PHOTOPERIOD ON PMSG-INDUCED NEST-BUILDING IN CANARIES

Summary.: Intact female canaries were either treated with PMSG and kept on long (20 hr light/4 hr dark) or short (about 10 hr light/14 hr dark) photoperiods from 1st March or were untreated and exposed to natural day lengths (Cambridge, England). Of the PMSG-treated birds, 65% laid after about 10 days, the latency being unaffected by the day length. Untreated birds laid over a month later.

Of the PMSG-treated birds which produced eggs, those kept on long photoperiods built nests much more on Days 5 to 2 before egg-laying than did those on short photoperiods. The difference is unlikely to be due merely to the longer time available for building, and suggests that the light regimen has a non-PMSG-mediated effect on building.