We investigated the relationship between rhythms occurring at different time-scales, namely circadian and ultradian rhythms. Furthermore, we examined the potential role of the period (per) gene, a known clock gene initially isolated in Drosophila, for regulating these rhythms in the wild-type cricket, Teleogryllus oceanicus . Here we report a positive correlation between circadian and ultradian rhythms in crickets. Thus, crickets with a slow endogenous circadian rhythm also have a slow ultradian rhythm, and conversely, animals with a fast endogenous circadian rhythm have a fast ultradian rhythm. In addition to this correlation, we observed PER-like immunoreactivity in the regions of the cricket nervous system involved in regulating these rhythms, namely the brain, in particular the optic lobes, and the meso- and metathoracic ganglia. We thus conclude that different time-scale rhythms may be regulated by a common setting element, a role potentially played by the per gene.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.20583 |
| Date | January 1998 |
| Creators | Lupien, Mathieu. |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Biology.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001641735, proquestno: MQ44212, Theses scanned by UMI/ProQuest. |
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