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Acta Biologica Hungarica

, Volume 58, Issue 1, pp 11–19 | Cite as

Thyroid Responses to Altered Photoperiod in the Soft-Shelled Turtle Lissemys punctata punctata Bonnoterre

  • Supriti Sarkar
  • Amita Sengupta
  • Santasri Chaudhuri-Sengupta
  • B. R. MaitiEmail author
Article

Abstract

The aim of the current investigation was to investigate the effect of photoperiod on thyroid activity in soft-shelled turtles (Lissemys punctata punctata). Thirty days exposure of short photoperiod with 2L : 22D increased relative weight, follicular epithelial height and peroxidase activity of the thyroid gland; whereas exposure of long photoperiod with 22L : 2D for 30 days showed reversed changes to those of the short photoperiod in adult female turtles. These findings indicate that short photoperiod stimulates thyroid activity and long photoperiod inhibits its activity in soft-shelled turtles. It is suggested that photoperiod exerts its action on thyroid activity presumably via gonads and/or pineal-gonadal axis in turtles.

Keywords

photoperiod thyroid histology peroxidase turtle 

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© Akadémiai Kiadó, Budapest 2007

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Supriti Sarkar
    • 1
  • Amita Sengupta
    • 1
  • Santasri Chaudhuri-Sengupta
    • 1
  • B. R. Maiti
    • 1
    Email author
  1. 1.Histophysiology Laboratory, Department of ZoologyUniversity of CalcuttaCalcuttaIndia

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