Acute Toxicity (96h) of a Herbicide-Paraquat to a Freshwater Fish, Poecilia reticulata (Peters)
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Date
2010
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Publisher
MPUAT, Udaipur
Abstract
In the present study short-term (96 hr) toxicity of paraquat to
juveniles, males and females of a freshwater fish, Poecilia reticulata for
selected levels of pH of the water have been evaluated to find out the LC50's
(median lethal concentrations) for different time intervals of 24, 48, 72 and
96 hrs. On the basis of LC50 values, safe and dischargeable concentrations of
paraquat have also been estimated for better management of fish culture
and/or aquaculture.
The result indicates that paraquat is highly toxic to juveniles, males
and females of Poecilia reticulata as LC50 values were recorded in ppb.
Further, juveniles and males were found more sensitive as compared to
females for paraquat at both pH (5.0 and 7.5) of water.
The presumable safe concentration of paraquat for juveniles, males
and females of Poecilia reticulata were ranged in between 26.15 to 96.14
ppb. for selected levels of pH. Whereas, the range of safe dischargeable
concentration of paraquat to juveniles, males and females of Poecilia were
recorded as 1.08 to 1.22 ppb. These safe dischargeable concentrations of
paraquat may be applicable to any water for better fish culture and / or
aquaculture.
Description
Acute Toxicity (96h) of a Herbicide-Paraquat to a Freshwater Fish, Poecilia reticulata (Peters)
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Citation
Paliwal and Gupta, 2010