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¹ University of Agriculture, Pathology, Faisalabad, Pakistan
² Department of University College of Veterinary and Animal Sciences, The Islamia University of Bahawalpur, Pakistan
³ The Islamia University of Bahawalpur, Department of Life Sciences (Zoology), and University College of Veterinary and Animal Sciences,- 63100, Pakistan, Bahawalpur, Pakistan
⁴ University of Karachi, Center of Excellence in Marine Biology, 75270, Karachi, Pakistan DOI : 10.4194/1303-2712-v16_2_09 Viewed : 5141 - Downloaded : 5149 This study was conducted to assess hemato-biochemical and different protoplasmic changes, which are indicators of genotoxicity in erythrocytes of Labeo rohita exposed to arsenic and urea. For this purpose, 20 fish were kept in glass aquaria for acclimatization (5 days), randomly divided into five equal groups: A (control) and exposed to arsenic (in mg/L) + urea (in g/L) B (8+0.2), C (10+0.4), D (12+0.6) and E (15+0.8), respectively for 9 days. Blood samples with anticoagulant were collected at 3rd, 6th and 9th experiment days for hematology. Serum was separated from blood samples collected without anticoagulants for biochemical studies. Results showed that exposure with arsenic and urea in higher concentrations (groups D and E) significantly decreased (P<0.05) erythrocyte counts, hemoglobin concentration, packed cell volume, mean corpuscular hemoglobin concentration, lymphocyte, and monocyte counts, accompanied by significant increase in mean corpuscular volume and leucocyte counts than those in control group (A). Alanine and aspartate amino transaminase activities at 6th and 9th days in high dose (groups D and E) were significantly increased whereas glucose and total protein decreased (P<0.05). It is concluded that arsenic has hemato-biochemical and genotoxic effects even at the low dose rate in the presence of nitrogenous chemicals in aquatic ecosystem. Keywords : Arsenic, Urea, Hemato-biochemical changes, Nuclear changes