International Journal of Environmental Sciences

Volume 2 Issue 3 2012           Pages: 1239- 1244

Annual Changes in the Ovary of Xenentodon Cancila (Ham.)

Author Information:

Zahida Bano- Department of Zoology and Applied Aquaculture Barkatullah University Bhopal

Susan Manohar - Department of Zoology and Applied Aquaculture Barkatullah University Bhopal

Chauhan.R - Department of Zoology, MLB College Bhopal

Najeeb A. Bhat -Department of Environmental Sciences and Limnology, Barkatullah University Bhopal

Qureshi.T.A -Department of Zoology and Applied Aquaculture Barkatullah University Bhopal

ABSTRACT
The gonads of Xenentodon cancila show well marked changes in their morphological (shape, size and volume) and histological features during different months of the reproductive cycle. On the basis of these changes, the reproductive cycle is divided into spawning (May to September), post-spawning (October to December) and pre-spawning periods (January to April). In the present study ten cytological stages in the development of oocytes have been observed in the ovary which are early and late chromatin-nucleolus stages, early and late peri-nucleolus stages, early and late yolk-vesicle stages, early and late yolk stages, pre-maturation stage and the mature stage. Besides these different oogenetic stages, Corpora atretica and post-ovulatory follicles are also present in the ovaries. The quantitative study of reproductive cycle of Xenentodon cancila has been made in respect of gono-somatic index during different months of the year. Although this study, regarding the gono-somatic index, is approximate, yet it is quite significant in understanding the gonadal cycle and seasonal changes in the gonads.

Keywords : Seasonal change, Ovary, reproductive cycle, Xenentodon Cancila.

DOI: 10.6088/ijes.00202030010


© 2012 Copyright Zahida Bano et al, licensee IPA.This is an open access article distributed under the Creative Commons Attribution License (2.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The electronic version of the article can be downloaded below.

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