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Journal of Environmental BiologypISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP |
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Abstract - Issue Mar 2009, 29 (2) BackDevicyprin induced gonadal impairment in a freshwater food fish, Channa punctatus (Bloch) Rajesh K. Srivastava, Kamlesh K. Yadav and Sunil P. Trivedi* Environmental Toxicology Laboratory, Department of
Zoology, (Received: June 12, 2006
; Revised received: October 25, 2006 ; Accepted: November 13, 2006) Abstract: Synthetic pyrethroids are the recent major class of broad spectrum, photostable, organic insecticides used in agricultural,
domestic and veterinary applications and now account for more than 30% of
global insecticide use. Cypermethrin is metabolized
and eliminated significantly more slowly by fish than by mammals or birds,
which may explain this compound’s high toxicity in fish compared to other
organisms. The present communication deals with histoanatomical
alterations in the gonads of a local fresh water food fish, Channa
punctatus exposed to 0.033 ppm
(96 hr LC50 X 1/10) concentration of a synthetic pyrethroid, devicyprin (cypermethrin 25%) in aquatic medium of aged tap water for
15, 30 and 45 days respectively. In testis, exposure dependent histological
damage has been observed in terms of vacuolization, condensation of spermatogonic cells, distortion of tubular epithelium,
shrinkage of interstitial cells and general inflammatory responses. Longest
exposure of 45 days has resulted in peculiar starry-sky appearance of the
testicular tissue. Gross histo-anatomy of ovarian
tissue reveals epithelial lesions, inflammatory responses, stromal
hemorrhage, increased interstitium and shrinkage of
yolk vesicles towards periphery. These findings are quite suggestive of
reproductive impairments leading to delayed gonadal
maturity and adversely affecting processes of sperm production and ovulation
and thus, the fish production. Key words: Pyrethroids,
Cypermethrin, Gonadal
impairment, Channa punctatus PDF of full length paper is available with author (sunil060523@rediffmail.com) Copyright
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