Abstract
This study assesses the effects of sequential applications of the insecticides Bassa 50EC (fenobucarb-F) and Vitashield 40EC (chlorpyrifos ethyl-CPF), sprayed at concentrations used by rice farmers in the Mekong Delta, on the brain acetylcholinesterase (AChE) in climbing perch fingerlings. After spraying the pesticides on the rice fields, the water concentrations of both insecticides decreased below the detection levels within 3 days. The sequential applications caused significant inhibition on the brain AChE activity in the exposed fish. The inhibition by F was quicker, but less prolonged, than for CPF. The inhibition levels caused by the sequential applications were lower than those caused by only CPF and by a mixture of CPF and F. The results indicate that sequential applications of pesticides could have a negative impact on aquatic organisms and fish yields, with implication for the aquatic biodiversity, local people’s livelihood and the aquaculture industry in the Mekong Delta.
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Acknowledgments
This study was made with financial support from Swedish International Development Cooperation Agency (Sida) (Ref. No. AKT2010-010) through the Partner Driven Cooperation (PDC) project “Managing Ecosystem Services for Sustainable Aquaculture Development. The study also funded by the Ministry of Education and Training of Vietnam (Ref. No. 4069/QĐ-BGDĐT). The manuscript was improved by the help of one anonymous reviewer.
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Tam, N.T., Berg, H., Laureus, J. et al. Effects of Sequential Applications of Bassa 50EC (Fenobucarb) and Vitashield 40EC (Chlorpyrifos ethyl) on Acetylcholinesterase Activity in Climbing Perch (Anabas testudineus) Cultured in Rice Fields in the Mekong Delta, Vietnam. Bull Environ Contam Toxicol 97, 98–104 (2016). https://doi.org/10.1007/s00128-016-1796-5
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DOI: https://doi.org/10.1007/s00128-016-1796-5