Entrainment analysis of the circadian locomotor activity rhythm in specimens of the crayfish, Faxonella clypeata, having activity peaks at different times of the solar day.

Abstract excerpt

Locomotor activity rhythms in the crayfish, Faxonella clypeata, were recorded under conditions of controlled light and temperature. In LD 12:12, dark active rhythms with a major activity onset at lights-off, and bimodally active rhythms with onsets at both lights-on and lights-off were recorded. In DD, most of the LD dark active rhythms retained the lights-off activity onset. However, among the majority of the LD...

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