Cireadian clocks are ubiquitous and are found in organisms ranging from bacteria to mammals. This ubiquity of occurrence implies adaptive significance, but to date there has been no rigorous empirical evidence to support ...

The fruit fly (Drosophila melanogaster) offers an extremely useful system to study circadian clock function at the behavioral, molecular, cellular, and organismal levels. We reared wild type (Oregon R+) and mutant flies – ...

Previously we have reported that selection for faster pre-adult development in fruit flies speeded-up development by similar to 29-h and shortened the clock period (tau) by similar to 0.5 h, which suggests that development ...

The objective of this study was to assess whether melatonin accelerates the reentrainment of locomotor activity after 6 h of advance and delay phase shifts following exposure to LD 12:12 cycle (simulating jet-lag/shift ...

In D. melanogaster, the observation of greater pupation height under constant darkness than under constant light has been explained by the hypothesis that light has an inhibitory effect on larval wandering behaviour, ...

Circadian clocks regulate physiological and behavioral processes in a wide variety of organisms, and any malfunction in these clocks can cause significant health problems. In this paper, we report the results of our study ...

Significant progress has been made in our understanding of the neurogenetics of circadian clocks in fruit flies Drosophila melanogaster. Several pacemaker neurons and clock genes have now been identified and their roles ...

The ventral lateral neurons ( LNvs) of adult Drosophila brain express oscillating clock proteins and regulate circadian behavior. Whole cell current-clamp recordings of large LNvs in freshly dissected Drosophila whole brain ...

Insects including the fruit fly Drosophila melanogaster are under intense pressure to develop rapidly because they inhabit ephemeral habitats. We have previously shown that when selection for faster development was ...

The sensitivity of the circadian pacemaker of the field mouse Mus booduga to diffuse daylight pulses of 15 min duration and 1000 lux intensity was measured in a series of experiments and a phase response curve (PRC) ...