Vol. 3, Issue 6 (2018)
Impact of Industrial Effluent on the Changes in Behaviour and Bodyweight of a Freshwater fish Tilapia, Oreochromis mossambicus (Peters)
Author(s): Kaveri KR, Dileepkumar TH, Lakshmi A, Akshatha HE, Asiya Nuzhat FB, Rajesh R, Shivaraj Y
Abstract: One must continue to anticipate increasing density of urban population with all the problems of air, water pollution and waste disposal from the local area industrial estate Antharasanahalli Tumakuru, Karnataka, India. Located near Tumakuru town discharge of heavy industrial effluent into aquatic environment from various sources even below permissible levels creates health hazards in aquatic organisms. Short term definitive test by static renewal bioassay method was conducted to determine the acute toxicity (LC50) of industrial effluent and freshwater fish fingerlings were exposed to different concentrations of industrial effluent 15ml/L for 96hrs, 30ml/L for 96hrs, 60ml/L for 96hrs and 120ml/L for 96hrs were selected for acute study on fish Tilapia, Oreochromis mossambicus procured from Fisheries Research and Information Centre (Inland) Hebbal, Bangalore, Karnataka, India. The size of the fish will be (3 ± 0.21 g; 3 ± 0.25 cm) and duration of the study will be 1, 5, 10 & 15 days respectively. The present study shows that behaviour condition of the fishes were varies and symptoms dictated like irregular, erratic and darting swimming movements, hyper excitability, capsizing, attaching to the surface, restlessness, difficulty in breathing, loss of equilibrium and gathering around the ventilation filter and the bodyweight of the fishes also decreases slowly up to 15 days of time period. This present investigation shows that impact of industrial effluent on the changes in behaviour and bodyweight of a freshwater fish, Tilapia, Oreochromis mossambicus. The results of the study evidenced that effluent is toxic and thus, it has led to the altered fish physiology. However the exact mechanism through which this is achieved needs to be studied further.