Risk assessment of malathion on health indicators of catfish: Food and water security prospective research
Mahboob, Z. Ahmad, H.F. Alkahem Al-Balawi, K.A. Al-Ghanim, F. Al-Misned, S. . 2020
Specimens of Heteropneustes fossilis were treated with various levels of malathion and its 96 h LC50 value
was determined. The effects of sub-lethal concentrations of insecticide on hematological and biochemical
profile of Heteropneustes fossilis were also registered. The 96 h LC50 value obtained was 8.81 mg/l.
Exposure of sub-lethal doses (0.44, 0.88 and 1.76 mg/l which are 5, 10 and 20% of the LC50) of malathion
to Heteropneustes fossilis for 3 weeks demonstrated that the toxicant had a detrimental effect on the blood
profile of fish. Blood cell (Erythrocyte and leucocytes) counts (from 1.66 to 1.44 cell 106 mm3 and
37.93 to 30.24 cell 103 mm3; respectively), haemoglobin (Hb) level (from 6.21 to 3.54 g/dl) and
haematocrit (Ht) estimates (from 34.26 to 30.52%) were reduced in the fishes exposed to malathion.
Elevated level (from 46.25 to 92.45 mg/100 ml) of glucose and decreased quantity (29.95 to 24.25 g/
dl) of protein in plasma was registered. Glycogen content in muscle and liver was also decreased. The
activity of enzymes glutamic-oxaloacetic transaminase (GOT) and glutamic-pyruvic transaminase
(GPT) were high in the fish treated with pesticide. The possible causes for variations in the different
parameters were identified and discussed
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Specimens of Heteropneustes fossilis were treated with various levels of malathion and its 96 h LC50 value
was determined. The effects of sub-lethal concentrations of insecticide on…