Start Submission Become a Reviewer

Reading: Use of liver histological alterations and erythrocytic nuclear abnormalities of two native f...

Download

A- A+
Alt. Display

Research Articles

Use of liver histological alterations and erythrocytic nuclear abnormalities of two native fishes in Kelani River, Sri Lanka as biomarkers for pollution impact assessments

Authors:

K M S Ruvinda,

University of Kelaniya, Kelaniya, LK
About K M S
Department of Zoology and Environmental Management, Faculty of Science
X close

A Pathiratne

University of Kelaniya, Kelaniya, LK
About A
Department of Zoology and Environmental Management, Faculty of Science
X close

Abstract

Multi-biomarker approach is recognised as a complementary tool for environmental monitoring studies to better appraise how pollutants affect ecosystems. This study examined histological alterations in the liver tissues and nuclear abnormalities in the peripheral erythrocytes of two native fish species inhabiting the Kelani River (Etroplus suratensis and Dawkinsia singhala) as ‘effect biomarkers’ for assessing pollution impacts. Surface water and native fishes were sampled from two polluted sites in the lower reaches (Kaduwela and Mattakkuliya) and a less polluted site in the upper reach (Ruwanwella) of the river covering rainy and dry periods. Physico-chemical analyses of surface water confirmed an increasing trend of pollution towards lower reach of the river. Significantly greater liver histopathologic condition indices and erythrocytic nuclear abnormality frequencies (p < 0.05) were found in the fishes inhabiting lower reaches of the river compared to those in the upper catchment at Ruwanwella. Biomarker responses revealed that the fish populations inhabiting the polluted sites in the river are under stress especially due to hepatic damage and genotoxicity. The results suggest that endemic and nationally threatened fish species in the riverine ecosystem may be at risk due to the contaminant stress under long term exposure. This study supports utility of erythrocyte nuclear abnormality and liver histopathological biomarker responses of native fishes as cost effective tools for identification of potential biological hazards of river pollution.

How to Cite: Ruvinda, K.M.S. and Pathiratne, A., 2020. Use of liver histological alterations and erythrocytic nuclear abnormalities of two native fishes in Kelani River, Sri Lanka as biomarkers for pollution impact assessments. Journal of the National Science Foundation of Sri Lanka, 48(1).
Published on 28 Apr 2020.
Peer Reviewed

Downloads

comments powered by Disqus