Photoperiodic synchronization of circannual rhythms in the European starling (Sturnus vulgaris).
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Biomedical subjects
E Gwinner
Publications and source records attributed to E Gwinner.
Testosterone induces "splitting" of circadian locomotor activity rhythms in birds.
Under the influence of testosterone, the free-running circadian rhythm of locomotor activity of the starling, Sturnus vulgaris, tends to "split" into two components which temporarily run with different circadian frequencies: "splitting" occurred in intact birds whose testes grew, and in castrated birds that were injected with testosterone. Since "splitting" most probably reflects the temporal separation of two (or two groups of) circadian oscillators, these results suggest that testosterone affects the mutual coupling of circadian oscillators controlling locomotor activity.
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Endogenous temporal control of migratory restlessness in warblers.
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Circannual rhythms in birds: their interaction with circadian rhythms and environmental photoperiod.
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[Circadian periodicity of mice and flight disturbance regarding a bird].
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[On several kinetic plays of the common raven (Corvus corax L.)].
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