We studied the eclosion rhythm of the marine midge Pontomyia oceana in southern Taiwan. The lunar/semilunr rhythm is known to be endogenous since it persists under continous light or dark conditions. In this study, we discovered that the period of the eclosion rhythm is about 15 days, although the midges have to spend an additional 15 days in the beginning of their lives before entering the eclosion rhythm. The period of the semilunrar eclosion rhythm is controlled by counting cycles of endogenous circadian rhythms which in term was entrainable by external light-dark (LD) cycles. We demonstrated this by modifying the period of LD cycles in different parts of their life histories with or without the entraining factor and then observing the ecolsion times in the laboratory. Night light can entrain the semilunar eclosion rhythm; we discovered that the cue and the eclosion are in the same phase of the semilunar rhythm but with a full cycle of shift. Temperature compensation in period control is demonstrated in this species. Q10 values close to 1 is found between 24 to 30¢XC in the laboratory.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0807106-153337 |
| Date | 07 August 2006 |
| Creators | Chang, Yin-hao |
| Contributors | How-Jing Lee, Chen-Chih Kao, Rong-Chi Huang, Shyh-Min Hsiao, Keryea Soong |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0807106-153337 |
| Rights | off_campus_withheld, Copyright information available at source archive |
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