Bulletin of Pure and Applied Sciences Section-A-Zoology is devoted to the international advancement of organized knowledge on all aspects of Zoology. It publishes original research papers, reviews and short communications within the whole field of zoology. Scope of the journal includes: Animal behaviour, biochemistry and physiology, developmental biology, ecology, genetics, morphology and ultrastructure, parasitology and pathology, and systematics and evolution. It provides a forum for comments by publishing original research contributions, scientific survey, case studies, book review and letter to the Editor-in-Chief. Bulletin of Pure and Applied Sciences Section-A-Zoology is issued six monthly, i.e. June and December of every year. The Editor-in-Chief/Managing Editor/Editorial Board etc. assumes no responsibility for the statements and opinions advanced by the contributors. The editorial staff in its work of examining papers, received for possible publication is assisted, in an honorary capacity, by a large number of distinguished scientists working in various parts of the world. Bulletin of Pure and Applied Sciences Section-A-Zoology is copy-righted. Manuscripts published in the Bulletin should not be reproduced without the written permission of the Editor-in-Chief.