Control of molt in birds: association with prolactin and gonadal regression in starlings

General and Comparative Endocrinology
Alistair Dawson

Abstract

Despite the importance of molt to birds, very little is known about its environmental or physiological control. In starlings Sturnus vulgaris, and other species, under both natural conditions and experimental regimes, gonadal regression coincides with peak prolactin secretion. The prebasic molt starts at the same time. The aim of this series of experiments was to keep starlings on photo-schedules that would challenge the normally close relationship between gonadal regression and molt, to determine how closely the start of molt is associated with gonadal regression and/or associated changes in prolactin concentrations. In one series of experiments, photosensitive starlings were moved from a short photoperiod, 8 h light per day (8L), to 13 or 18L, and from 13 to 18L or 13 to 8L during testicular maturation. Later, photorefractory birds under 13L that had finished molting were moved to 18L. In another series of experiments, photorefractory starlings were moved from 18 to 8L for 7 weeks, 4 weeks, 2 weeks, 1 week, 3 days, 1 day, or 0 days, before being returned to 18L. There was no consistent relationship between photoperiod, or the increase in photoperiod, and the timing of the start of molt. Nor was there a consistent relationship...Continue Reading

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Citations

Dec 3, 2014·General and Comparative Endocrinology·Bethany F NelsonAlistair Dawson
Dec 1, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Alistair Dawson
Dec 14, 2011·General and Comparative Endocrinology·Tony D Williams
Dec 23, 2009·General and Comparative Endocrinology·Ricardo José Garcia PereiraJosé Maurício Barbanti Duarte
Dec 27, 2008·The Journal of Investigative Dermatology·Kerstin FoitzikRalf Paus
Dec 9, 2008·Physiology & Behavior·Aurélie TanvezGérard Leboucher
Jun 14, 2008·General and Comparative Endocrinology·Leonida Fusani
Mar 21, 2007·General and Comparative Endocrinology·Alistair Dawson, Peter J Sharp
Sep 1, 2015·General and Comparative Endocrinology·Kristen M CovinoFrank R Moore
Oct 27, 2011·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Elizabeth A Landeen, Alexander V Badyaev
Sep 1, 2015·Theriogenology·Małgorzata Gumułka, Israel Rozenboim
Jul 22, 2015·Journal of Molecular Biology·Chih-Chiang ChenCheng Ming Chuong
Apr 1, 2008·General and Comparative Endocrinology·Jonathan VerreaultOlivier Chastel
Mar 6, 2018·Biological Reviews of the Cambridge Philosophical Society·Marketa ZimovaL Scott Mills
Jun 22, 2018·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Anand S DixitNamram S Singh
Dec 7, 2017·Global Change Biology·Barbara M TomotaniMarcel E Visser
Mar 22, 2020·Genes, Brain, and Behavior·Kathleen S LynchJulia Shalov
May 18, 2018·Proceedings. Biological Sciences·Roxanne S BeltranGreg A Breed
Jan 1, 2018·The Journal of Poultry Science·Andrzej OchremMarek Gucia
Sep 24, 2014·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Anand S DixitRamita Sougrakpam
Mar 16, 2019·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·William A ButtemerSteffen Hahn
Feb 3, 2012·Molecular Biology Reports·Chenglong LuoXiquan Zhang
Oct 25, 2011·General and Comparative Endocrinology·Glenn T CrossinTony D Williams

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