Journal of Environmental Biology

Genotoxic evaluation of lambda-cyhalothrin in Mystus gulio

 

B. Velmurugan, T. Ambrose and M. Selvanayagam

P.G. and Research Department of Zoology, Loyola College, Chennai - 600 034, India

 

(Received: 15 May, 2004 ; Accepted: 25 May, 2005)

 

 

Abstract: Genotoxic potential of pyrethroid pesticide lambda cyhalothrin (Karate) on Mystus gulio was studied using chromosomal aberration test in the gill cells. Fishes exposed in vivo to 6.4 ppb (10% 96hr LC₅₀) concentration of compound and sacrificed at four different sampling times 24, 48, 72, and 96 hr against the parallel-untreated tap water control. The different types of aberrations observed were chromatid breaks, centromeric fusion, acentric fragments, chromosomal gaps, sticky plates, aneuploidy and ring chromosomes. Chromosomal aberrations were found to be significantly increased in number than in control, and are statistically significant at (p<0.05) level.

 

Key words: Mystus gulio, Lambda-cyhalothrin, Gill cells, Chromosomal aberrations, Genotoxicity.

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