Variation in thyroid activity with respect to annual seasonal cycle of reproduction in turtle Melanochelys trijuga.

Chandavar, V. R. and Naik, P. R. (2012) Variation in thyroid activity with respect to annual seasonal cycle of reproduction in turtle Melanochelys trijuga. International Journal of Life Science and Pharma Research, 2 (3, Cop). pp. 126-134. ISSN 2250-0480

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Abstract

We detd. the relationship between annual cycle of reprodn. and thyroid activity in Melanochelyz trijuga. The animals were studied in the annual seasonal cycle of reprodn. which is distinguished into 3 sep. periods: regenerative, reproductive, and recrudescent. Thyroid is an unpaired, oval shaped gland. Paraffin-embedded thyroid sections were studied by bromophenol blue method for thyroglobulin. Liver sections were localized for glycogen. Plasma glucose was estd. in different periods of reproductive cycle. Thyroid showed seasonal variation in its activity. The present investigation demonstrates increased thyroid activity from regenerative to reproductive period which decreased to min. in recrudescent period. The active thyroids appeared spongy and translucent with max. wt. and size. Wt. of the gland is pos. correlated with wt. of the animal. Liver glycogen and abdominal fat was utilized during winter months of recrudescent period to maintain basal metabolic rate. Environmental temp. appeared to play effective role on thyroid activity. Cyclic changes in the thyroid may have indirect effect on reproductive cycle and sexual behavior as well as in gonad maturation. [on SciFinder(R)]

Item Type: Article
Additional Information: Unmapped bibliographic data: PY - 2012/// [EPrints field already has value set] JA - Int. J. Life Sci. Pharma Res. [Field not mapped to EPrints]
Uncontrolled Keywords: thyroid gland turtle reprodn cycle
Subjects: Agriculture Biological Sciences > Zoology
University of Mysore > PG Campuses > Manasagangotri, Mysore > Agriculture Biological Sciences > Zoology
Divisions: Constituent Colleges > Yuvaraja's College Mysore
Depositing User: Kodandarama
Date Deposited: 25 Jun 2013 04:40
Last Modified: 25 Jun 2013 04:40
URI: http://eprints.uni-mysore.ac.in/id/eprint/13021

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