DOSE DEPENDENT EFFECT OF SYNTHETIC HERBICIDE (ATRAZINE) ON THE MORPHOLOGICAL PARAMETERS IN POECILIA SPHENOPS
S. Vasanth*, T. Siva Vijayakumar, G. Bupesh and P. Subramanian
ABSTRACT
Atrazine is one of the most efficient and cheapest herbicides in the world and is subsequently used more commonly than any other herbicide. Atrazine is frequently detected in waters, and has been known to affect reproduction of aquatic flora and fauna, which in turn impacts on the community structure as a whole. In the present study was designed to investigate the effect of atrazine on sex ratio, Gonadosomatic index and Hepatosomatic index in Poecilia sphenops. Fishes were exposed to atrazine (2.5, 1.25, 0.83 ppm) and control also maintained simultaneously for 100days. In our experiments, atrazine exposures lead to a female-biased sex ratio. A reduction of GSI in Poecilia sphenops is observed after exposure to atrazine at all exposure concentrations and all times. Comparative liver weight is increased (dose and duration dependant) in male and female Poecilia sphenops treated with atrazine.
Keywords: Atrazine, Sex ratio, Gonadosomatic Index, Hepatosomatic Index, Poecilia sphenop.
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