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  1. 1 Folia Biologica

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  1. 1 1992

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  1. 1 Sura P.

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Circadian rhythm in the pineal organ of the yellow-bellied toad, Bombina variegata (L.), under laboratory conditions

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Sura P.
Folia Biologica
|
1992
|
vol. 40
|
issue 3-4
145-149
EN
A circadian morphological rhythm of the pineal organ, as judged by changes in the nuclear volume of the photoreceptor cells, was found in sexually nature male Yellow-bellied toads (Bombina variegata) maintained continuously at 26 ?C and on a 17L/7D illumination cycle. The greatest nuclear volume occurred at the photophase (16.00 h), and the lowest at the end of the scotophase (4.00 h).
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