Table of Contents
Journal of Histology
Volume 2015 (2015), Article ID 307439, 8 pages
http://dx.doi.org/10.1155/2015/307439
Research Article

Interspecific Variations in Duration of Tail Regression in Two Tropical Anurans

1Cell and Developmental Biology Laboratory, Department of Zoology, Utkal University, Bhubaneswar, Odisha 751 004, India
2Department of Zoology, Khallikote Autonomous College, Berhampur, Odisha 760 001, India

Received 28 August 2015; Revised 9 November 2015; Accepted 11 November 2015

Academic Editor: Victor H. Casco

Copyright © 2015 Cuckoo Mahapatra and Pravati Kumari Mahapatra. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Anurans breed in an array of habitats and hence employ a variety of evolutionary strategies to adapt to the variable conditions. Particularly, since they undergo a larval phase they develop mechanisms to overcome unfavourable conditions like desiccation, extreme temperatures, and so forth. The anurans, Polypedates maculatus and Duttaphrynus melanostictus, show noticeable variation in the duration of larval period and tadpole tail regression. D. melanostictus breeds throughout the year and hence is subjected to different environmental conditions as compared to P. maculatus which breeds only during the rainy season. Thus, the tadpoles of D. melanostictus have selected to undergo a shorter larval period and duration of tail regression to suit their breeding habits. The present study correlates the interspecific difference in the duration of tail regression with the morphological variations in the tails of the two species. D. melanostictus shortens the duration of larval tail regression by having comparatively larger and more number of melanocytes and a thinner notochord than P. maculatus.