Abstract
Zinc is an essential trace element for the normal development and metabolism of living organisms. Mrigal (Cirrhinus mrigala) was exposed to sub-lethal concentrations 9.3, 13.2, 18.6 and 31 mg/l of zinc sulphate for 30 days and ultrastructural alterations were observed in the gills. The gill epithelium of the untreated group showed a normal architecture while zinc- treated groups showed certain marked changes in gill tissues such as fusion of secondary lamellae, edema, disruption of gill epithelium, hypertrophy, hyperplasia, broken and swollen microridges, broken tips and upliftment of gill rakers, heavy exudation of mucous and disorganization of secondary lamellae. These changes demonstrate the morphological responses of the fish when exposed to zinc sulphate. The present study clearly shows that gills are an important target organ for zinc toxicity in C. mrigala.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
