Literaturdatenbank
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Sengupta, A. S. S., Chaudhuri-Sengupta, S., Ray, P. P., & Maiti, B. R. (2004). Seasonal thyroid cycle of the soft-shelled turtle, lissemys p. punctata (bonnoterre). Biological Rhythm Research, 35(3), 205–212.
Added by: Admin (14 Aug 2008 20:38:55 UTC) |
| Resource type: Journal Article BibTeX citation key: Sengupta2004 View all bibliographic details  |
Categories: General Keywords: Lissemys, Lissemys punctata, Physiologie = physiology, Schildkröten = turtles + tortoises, Trionychidae, Trionyx Creators: Chaudhuri-Sengupta, Maiti, Ray, Sengupta Collection: Biological Rhythm Research |
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| Abstract |
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Trionyx The current study was undertaken to ascertain the seasonal influence of thyroid activity in female soft-shelled turtles, Lissemys p. punctata. Thyroid gland was studied month-wise throughout the year from relative gland weight, histology, epithelial height, glandular peroxidase activity, and RIA of T3 and T4 levels from blood serum and the thyroid gland. The values of all the parameters, except those of T3 and T4, were higher during March through May, decreased from June through August and began to rise thereafter (September through February). Whereas T3 and T4 levels were highest in May, lower during June to November and began to rise thereafter. The difference in the peaks between T3 and T4 levels and other parameters have been explained. The findings suggest that thyroid activity of Lissemys turtles varies seasonally and that seasonal factors like temperature play an important role in influencing thyroid activity in soft-shelled turtles.
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