caa a22 4500 477082696 CHVBK 20180405111454.0 cr unu---uuuuu 170330e19960701xx s 000 0 eng 10.1007/BF01925577 doi (NATIONALLICENCE)springer-10.1007/BF01925577 Pohl H. Max-Planck-Institut für Verhaltensphysiologie, D-82346, Andechs, (Germany) aut Exogenous melatonin accelerates re-entrainment: Attenuation of the circadian rhythm of metabolic rate in the canary, Serinus canaria [Elektronische Daten] [H. Pohl] Administration of melatonin in the drinking water (200 μg/ml in 1% ethanol) decreased the time of re-entrainment of the circadian rhythm of the metabolic rate (measured as oxygen uptake) of domestic canaries (Serinus canaria) after 10-h delay phase shifts of the light-dark (LD) cycle by 1.3 days on average. Associated with faster re-entrainment, the amplitude of the metabolic rhythm was attenuated by 46% on, average on the first day after the shift as compared with about 25% in the controls. After re-entrainment, the amplitude of the metabolic rhythm during melatonin administration was about 23% lower than in the controls. The minimum resting metabolic rate increased by ca 5% on average during treatment with melatonin. The results are consistent with the hypothesis that constant high plasma levels of melatonin act on higher levels of the circadian oscillatory system rather than by directly affecting peripheral or central photoreceptors. Birkhäuser Verlag, 1996 Melatonin nationallicence circadian rhythms nationallicence metabolic rate nationallicence re-entrainment nationallicence birds nationallicence Experientia Birkhäuser-Verlag 52/7(1996-07-01), 695-701 0014-4754 52:7<695 1996 52 18 https://doi.org/10.1007/BF01925577 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01925577 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Pohl H. Max-Planck-Institut für Verhaltensphysiologie, D-82346, Andechs, (Germany) aut NATIONALLICENCE 773 0- Experientia Birkhäuser-Verlag 52/7(1996-07-01), 695-701 0014-4754 52:7<695 1996 52 18 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer