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%20%20%20%20Influence%20of%20Elemental%20Iodine%20and%20Thiourea%20on%20Metamorphosis%20of%20Philautus%20sp
Research article
  

Influence of Elemental Iodine and Thiourea on Metamorphosis of Philautus sp.


Krishnapriya M. V., Arulvasu C., Sheeba P., Sujitha C. S., Neethu P. G.

1Department of Zoology, University of Madras, Guindy Campus, Chennai, India
2Department of Zoology, Vimala College, Thrissur, Kerala, India


Corresponding author :

Krishnapriya M. V.
Email:

Received: July 5, 2014,   Accepted: July 29, 2014,   Published:


Abstract:

The developmental stages of frog species are usually influenced by the presence or absence of naturally occurring acceleratory or inhibitory agents. The embryonic development of Philautus sp. has been studied in its natural habitat, followed by laboratory observation. The study concentrates on the determination of the influence of thyroid related hormones on the metamorphosis of Phlilautus sp., especially the acceleratory action of iodine and inhibitory action of thiourea. The series of iodine concentrations as 0.5, 1.0, 1.5 and 2.0 ppm and thiourea concentrations as 5.0 and 10.0 ppm were maintained with a control. The rate of metamorphosis was found to show a gradual increase from its lower to higher concentration in case of iodine. The highest 2.0 ppm iodine culture tadpoles, completed metamorphosis on the 24th day, while controls metamorphosed completely on 46th day, since iodine feeding. On the other, in the case of thiourea, there was a gradual inhibition of the metamorphosis rate from its lower to higher concentrations.


Keywords: Phlilautus, Iodine, Thiourea, Metamorphosis


Citation:

Krishnapriya M. V., et al (2014). Influence of Elemental Iodine and Thiourea on Metamorphosis of Philautus sp.. J. of Advanced Botany and Zoology, V1I4. DOI: 10.15297/JABZ.V1I4.06


Copyright:

© 2014 Krishnapriya M. V. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


      
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      Journal of Advanced Botany and Zoology