ISSN:
1573-3297
Keywords:
circadian
;
ultradian
;
locomotor activity
;
per locus
;
clock mutants
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Psychology
Notes:
Abstract Using digital techniques for signal analysis—the correlogram and a high-resolution analysis of time series, maximum-entropy spectral analysis (MESA)—we have detected both circadian and ultradian rhythms in the locomotor activity of free-runningper 0 males and in females lacking theper locus (per −; heterozygous for two deficiencies, each of which deletes the gene). Over half theper 0 individuals and half theper − individuals tested were rhythmically active, with dominant periods ranging from 4 to 22 h; most of the significantly rhythmicper 0 andper − flies clearly exhibited multiple periodicities. This novel pattern of rhythmic behavior is thoroughly distinct from the wild-type pattern. One hypothesis suggested by our observations is that theper + gene products mediate the coupling of multiple ultradian oscillators to produce wild-type circadian rhythms.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01066008
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