Nature Environment and Pollution Technology

Open Access Open Access  Restricted Access Subscription Access

Effects of Sublethal Level of a Pesticide, Monocrotophos, on Haematology of Cyprinus carpio during the Exposure and Recovery Periods


Affiliations
1 Department of Zoology and Wild Life Biology, A. V. C. College, Mayiladuthurai, Tamil Nadu, India
2 Department of Zoology, Nehru Memorial College, Puthinampatti, Trichy, Tamil Nadu, India
 

The acute toxicity of monocrotophos on the common edible freshwater fish, Cyprinus carpio has been studied. The fish were procured and their sublethal, median lethal and lethal doses for 120 hours were assessed as 100 ppm, 156.92ppm and 250 ppm respectively. From the 24 hours LC50 and 48 hours LC50 values, the presumable harmless concentration was calculated as 53.46 ppm to which the fish were introduced. Haematological studies were carried out with reference to Hb, PCV, TEC, TLC, and other absolute values such as MCV, MCH and MCHC. During the exposure period, a reduction in haemoglobin content, packed cell volume and total erythrocyte count was observed. During recovery period, the fish overcame the stress induced by the toxicant by the continuous detoxification process, as a result of which the Hb, PCV and TEC increased and TLC decreased progressively to attain the normal level.
User
Notifications
Font Size


Abstract Views: 131

PDF Views: 1




  • Effects of Sublethal Level of a Pesticide, Monocrotophos, on Haematology of Cyprinus carpio during the Exposure and Recovery Periods

Abstract Views: 131  |  PDF Views: 1

Authors

G. Thomas Nithiyanandam
Department of Zoology and Wild Life Biology, A. V. C. College, Mayiladuthurai, Tamil Nadu, India
C. Maruthanayagam
Department of Zoology, Nehru Memorial College, Puthinampatti, Trichy, Tamil Nadu, India
P. Visvanathan
Department of Zoology and Wild Life Biology, A. V. C. College, Mayiladuthurai, Tamil Nadu, India

Abstract


The acute toxicity of monocrotophos on the common edible freshwater fish, Cyprinus carpio has been studied. The fish were procured and their sublethal, median lethal and lethal doses for 120 hours were assessed as 100 ppm, 156.92ppm and 250 ppm respectively. From the 24 hours LC50 and 48 hours LC50 values, the presumable harmless concentration was calculated as 53.46 ppm to which the fish were introduced. Haematological studies were carried out with reference to Hb, PCV, TEC, TLC, and other absolute values such as MCV, MCH and MCHC. During the exposure period, a reduction in haemoglobin content, packed cell volume and total erythrocyte count was observed. During recovery period, the fish overcame the stress induced by the toxicant by the continuous detoxification process, as a result of which the Hb, PCV and TEC increased and TLC decreased progressively to attain the normal level.