Journal of Environmental Biology

Impact of industrial effluents on the biochemical composition of fresh water fish Labeo rohita

 

D.V. Muley*,? D.M. Karanjkar and S.V. Maske

Department of Zoology, Shivaji University, Kolhapur-416 004, India

(Received: Decemebr 16, 2004 ; Revised received: May 10, 2005 ; Accepted: June 16, 2005)

Abstract: In acute toxicity (96 hr.) experiment the fingerlings of freshwater fish Labeo rohita was exposed to tannery, electroplating and textile mill effluents. The LC₀ and LC₅₀ concentrations were 15% and 20% for tannery effluents, 3% and 6% for electroplating effluents and 18% and 22% for textile mill effluents respectively. It was found that, electroplating effluent was more toxic than tannery and textile mill wastes. After acute toxicity experiments for different industrial effluents, various tissues viz. gill, liver, muscle and kidney were obtained separately from control, LC₀ and LC₅₀ groups. These tissues were used for biochemical estimations. The glycogen content in all the tissues decreased considerably upon acute toxicity of three industrial effluents except muscle in LC₅₀ group of tannery effluent and kidney in LC₅₀ group of textile mill effluent, when compared to control group. The total protein content decreased in all tissues in three effluents except gills in LC₅₀ group of tannery effluent, kidney in LC₅₀ group of electroplating effluent and kidney in LC₀ group of textile mill effluent. In general total lipid content decreased in all tissues after acute exposure when compared to control group. The results obtained in the present study showed that, the industrial effluents from tannery, electroplating and textile mills caused marked depletion in biochemical composition in various tissues of the fish Labeo rohita after acute exposure.

Key words: ?Labeo rohita, Acute toxicity, Industrial effluents, Biochemical composition

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