A model based on oscillatory threshold and build-up of a developmental substance explains gating of adult emergence in Drosophila melanogaster.

Abstract excerpt

Adult emergence (eclosion) of fruit flies Drosophila melanogaster under constant laboratory conditions follows a circadian pattern with bouts of eclosion recurring at approximately 24 h intervals. Under periodic light:dark (LD) cycles, adults emerge only during a specific time of the day followed by little or no emergence for the rest of the day. This phenomenon is therefore equated to a gate of emergence that,...

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