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Title: Toxicity of cypermethrin to the juveniles of freshwater fish <i style="">Poecilia</i><i style=""> reticulata </i>(Peters) in relation to selected environmental variables
Authors: Gautam, P P
Gupta, A K
Keywords: Toxicity
Fresh water fish
<i>Poecilia</i><i> </i><i style="">reticulata</i>
Environmental variables
Issue Date: Aug-2008
Publisher: CSIR
Series/Report no.: <b style="">Int. cl.<sup>8</sup>- </b>A01K 61/00, A01K 63/04, A01N 25/00
Abstract: Toxicity of cypermethrin, a synthetic pyrethroid insecticide, was evaluated for the juveniles (8.5± 1.5 mm) of a freshwater fish, <i>Poecilia</i><i> reticulata</i> (Peters) in relation to selected environmental variables such as temperature, hardness, <i style="">p</i>H and salinity. The LC<sub>50</sub>’s were found to change significantly with the change in temperature, hardness, <i style="">p</i>H and salinity of water. The juveniles were found more susceptible to cypermethrin at low water hardness (270±1 mg/l) and low water pH (5.4) as compared to other variables. Based on LC<sub>50</sub>’s the order of toxicity of cypermethrin to juveniles of <i>Poecilia</i><i> </i>was observed as: <i style="">p</i>H <salinity <hardness < temperature. The range of safe dischargeable concentrations of cypermethrin<b style=""> </b>(1.04-1.09 ppb) was too low as compared to harmless or safe concentrations (45.18-75.25 ppb) for the juveniles at selected environmental variables
Description: 314-319
ISSN: 0975-1092 (Online); 0972-592X (Print)
Appears in Collections:NPR Vol.7(4) [July-August 2008]

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