Biolife, Volume 3, Issue 3, 2015
Mystus vittatus, an indigenous fish species of West-Bengal are economically important due to its delicious taste. The ovarian histo-
morphology and its annual changes and the spawning periodicity of this catfish were studied collected monthly in one year period of
November, 2012 to October, 2013. The fecundity, gonado-somatic index, different stages of ovarian development (nucleus changes,
oocyte diameter and formation of yolk vesicles, yolk granules and lipid droplets through histological observation) of M. vittatus were also
observed in this article. By gross morphology and its seasonal changes of ovary especially on the changes in cell structure of this species,
five maturity stages were distinguished to categorize the developing ovary: immature, mature, early ripening, ripe and spent. Our
investigation has revealed that gonado-somatic index (GSI) in M. vittatus began to increase in March and peaked in July then declined
sharply in September-October. This cat fish attained sexual maturity at 10-11 cm in length, 10-12 g in weight which was confirmed at
the peaks of gonado-somatic index (GSI) and fecundity. The fecundity of Mystus vittatus has shown highly significant correlation with
body length, body weight and ovary weight.
Keywords- Mystus vittatus, gonado-somatic index, fecundity.
Published online 8 July, 2015
© 2015 Published by Global Science Publishing Group, USA
How to Cite this Article:
Arnab Basu, Sheela Roy, Indrani Sarkar, Kishore Dhara and Siddhartha Datta. (2015). Seasonal changes in ovarian
maturation of an Asian Cat fish, Mystus vittatus (Bloch, 1797) in captivity. Biolife, 3(3), pp 620-628.
Link to this article: http://biolifejournal.com/10.17812_blj.2015.338.html