Scanning electron microscopic evaluation of effect of cortisol on chloride cells of tilapia, <i>Oreochromis mossambicus</i>

Abstract

The effect of exogenous administration of cortisol (0.2 μg/g<i> </i>body weight) for 24, 48 and 72 hr on the gill epithelium of Tilapia has been studied. The results clearly revealed that out of the three sub-types of chloride cells viz., shallow basin, wavy convex and deep hole, the shallow basin ones are the most abundant in number. <i>In vivo </i>administration of cortisol conspicuously increased the number of the shallow basin chloride cells and caused noticeable changes in the microridges of pavement cells right from 24 hr treatment onwards. The present study confirms heterogeneity of chloride cells in teleosts.