• BINDULEKHA D S

Abstract— Population growth and industrial development are the major causes of contamination of water resources. In developing countries, pollution of water resources has become a serious problem which leads to ecological disorders and causes many physiological as well as biological changes in aquatic animals. Detergents and other cleansing agents have been around for a quite long time. Wide spread use of detergents cause excess frothing and growth of floating aquatic weeds (eutrophication) on the water surface, affecting aeration and quality of fresh water. Anabas testudineus, a common fresh water fish in Kerala was selected in the present study to determine the effect of detergent pollution on the oxygen consumption capacity of the fish in four different concentrations of a popular brand of detergent (sunlight). The amount of dissolved oxygen consumed by fishes was determined using Winkler’s method. It is evident from the present study that the samples treated with 50 ppm, 100 ppm, 500 ppm, 1000 ppm of detergent for a time period of 1 hour, the dissolved oxygen content showed a decreasing trend with higher concentration of detergent. Further it demonstrated that dissolved oxygen consumption in Anabas testudineus increases with an increase in the concentration of detergent. All these results clearly indicate a severe impact of detergents on the aquatic ecosystem.

Detergents, Dissolved Oxygen, Fish, Pollution, Anabas

"Effect of different concentrations of detergent on dissolved oxygen consumption in freshwater fish Anabas testudineus ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 4, page no.669-672, April-2018, Available :http://www.jetir.org/papers/JETIR1804134.pdf

"Effect of different concentrations of detergent on dissolved oxygen consumption in freshwater fish Anabas testudineus ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 4, page no. pp669-672, April-2018, Available at : http://www.jetir.org/papers/JETIR1804134.pdf