دورية
Influence of Photoperiod and Temperature on Serum Melatonin in the Diamondback Water Snake, Nerodia rhombifera
| العنوان: | Influence of Photoperiod and Temperature on Serum Melatonin in the Diamondback Water Snake, Nerodia rhombifera |
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| المؤلفون: | Tilden, Andrea R., Hutchison, Victor H. |
| المصدر: | General and Comparative Endocrinology; December 1993, Vol. 92 Issue: 3 p347-354, 8p |
| مستخلص: | Serum melatonin concentrations in the diamondback water snake, Nerodia rhombifera, were measured with a radioimmunoassay to determine the influence of photoperiod and temperature on melatonin levels. A diel cycle of serum melatonin, with elevated concentrations during scotophase, occurred in snakes acclimatized for 2 weeks to a 12L:12D photoperiod and 25°. This cycle persisted in snakes acclimatized to a reverse photoperiod, with a longer duration of elevated scotophase levels. In snakes acclimatized to a normal 12L:12D photoperiod and 10°, photophase serum melatonin concentrations were lower than at 25°, and there was no increase during scotophase. Snakes acclimatized to a normal 12L:12D photoperiod and 35° had lower serum melatonin levels than those at 25°, but this difference was not statistically significant. Photoperiod and temperature interact to influence serum melatonin in N. rhombifera, with photoperiod affecting the phase and temperature affecting the amplitude of the diel melatonin cycle. Copyright 1993, 1999 Academic Press |
| قاعدة البيانات: | Supplemental Index |
Full Text Finder | تدمد: | 00166480 10956840 |
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| DOI: | 10.1006/gcen.1993.1172 |