69 research outputs found
Arrhythmic perch hopping and rhythmic feeding of starlings in constant light: Separate circadian oscillators?
Get PDFPerch hopping activity and food intake were recorded in starlings in different intensities of continuous illumination (LL), varying from 0.1 to 1000 lux. Circadian rhythmicity in perch hopping disappeared in 10 lux and all higher intensities. In contrast, freerunning circadian rhythms in feeding were always present. In low light intensities, the perch hopping rhythm usually phase leads feeding, increasingly so with shorter circadian period. Locomotor activity may reflect motivational states unrelated to feeding.
Jahresperiodik der Gonadengröße und der Mauser beim Star (Sturnus vulgaris) unter Photoperiode-Zyklen unterschiedlicher Periode
No full textTesticular development of European Starlings in early spring: Response to short or increasing daylength?
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Differential effects of testosterone on the circadian rhythms of locomotor activity and feeding in the European starling
No full textEine Methode zur quantitativen Isolierung von dĂĽnnschichtchromatographisch aufgetrennten Substanzen
No full textVerteilung und Stoffwechsel von 14C -markiertem Tetracain nach intravenöser Injektion beim Meerschweinchen
No full textExpériences faites avec le densitomètre TLD 1001) en vue de l'évaluation quantitative de chromatogrammes sur couche mince
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