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| Titel: |
Circadian rhythm and ultradian oscillations in the motor activity of the lacertid lizard Gallotia galloti in continuous light |
| Auteur: |
Garcia-Diaz, C. Molina-Borja, M. Gonzalez-Gonzalez, J. |
| Verschenen in: |
Biological rhythm research |
| Paginering: | Jaargang 20 (1989) nr. 2 pagina's 97-105 |
| Jaar: |
1989-05 |
| Inhoud: |
Motor activity of lacertid lizards (Gallotia galloti) was continuously recorded through sensitive platforms during some days in LD and later for up to 20 days in LL. Light intensity was 4.6 μE.s-1.m2, both during light period of LD and in LL and temperature was maintained constant (28°C ±0.5). The circadian periods, calculated through periodogram analysis, were less than 24 h except in two lizards (out of 8) having a period somewhat longer than 24 h. Ultradian frequencies, obtained by means of a Fast Fourier Transform, were calculated for two consecutive segments of 64 data points ("morning”; and “afternoon”;, respectively) of each lizard and day. The ultradian peaks mainly fell into two bands: 9-36 c/day (= 160-40 min. period range) and 45-90 c/day (32-16 min). In most of the animals, the mean power of the first band was significantly greater (p < 0.05) than that of the second one, both in “morning”; and “afternoon”; segments, but for two lizards the mean power of the second band was significantly greater also in both data segments. These results are compared with those obtained in previous analyses of ultradian bands in LD. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 3 van 8 gevonden artikelen
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