Title page for etd-0807106-153337


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URN etd-0807106-153337
Author Yin-hao Chang
Author's Email Address No Public.
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Department Marine Biology
Year 2005
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Period Mechanism of Semilunar Eclosion Rhythm of the Marine Midge Pontomyia oceana
Date of Defense 2006-07-03
Page Count 49
Keyword
  • Pontomyia oceana
  • Eclosion
  • Semilunar
  • Period
  • Abstract 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°C in the laboratory.
    Advisory Committee
  • How-Jing Lee - chair
  • Shyh-Min Hsiao - co-chair
  • Chen-Chih Kao - co-chair
  • Rong-Chi Huang - co-chair
  • Keryea Soong - advisor
  • Files
  • etd-0807106-153337.pdf
  • indicate in-campus access immediately and off_campus access in a year
    Date of Submission 2006-08-07

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