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| Titel: |
Circadian rhythm in the locomotor behavior in a population of paramecium multimicronucleatum |
| Auteur: |
Hasegawa, Kenji Katakura, Takashi Tanakadate, Akihiro |
| Verschenen in: |
Biological rhythm research |
| Paginering: | Jaargang 15 (1984) nr. 1 pagina's 45-56 |
| Jaar: |
1984-03 |
| Inhoud: |
The circadian behavioral rhythm in a population of Paramecium multimicronucleatum was examined by means of a computer/video system. A parameter, “traverse frequency”;, was introduced to index a locomotor activity of the specimens. The frequency is the average number of paramecia images per hour which individually traversed underneath photo-cells placed on the CRT-screen of the TV monitor. The traverse frequency was entrained and phase-shifted by light-dark (LD) cycles. It was highest at about 4 h after the beginning of the dark period and lowest at about 4 h after the beginning of the light period in LD 12:12 (20°C). Its rhythm free-ran in DD and LL with about a 24 h period, the LL rhythm being relatively less stable than the DD rhythm. The free-running period of DD rhythm was temperature-compensated for 15-25°C. The circadian rhythmicity in the traverse frequency implies that the daily locomotor behavior of Paramecium is controlled by its circadian pacemaker. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 2 van 10 gevonden artikelen
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