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NPR Vol.7(4) [July-August 2008] >


Title: Toxicity of cypermethrin to the juveniles of freshwater fish Poecilia reticulata (Peters) in relation to selected environmental variables
Authors: Gautam, P P
Gupta, A K
Keywords: Toxicity
Cypermethrin
Fresh water fish
Poecilia reticulata
Environmental variables
Issue Date: Aug-2008
Publisher: CSIR
IPC CodeInt. cl.8- 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, Poecilia reticulata (Peters) in relation to selected environmental variables such as temperature, hardness, pH and salinity. The LC50’s were found to change significantly with the change in temperature, hardness, pH 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 LC50’s the order of toxicity of cypermethrin to juveniles of Poecilia was observed as: pH (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
Page(s): 314-319
ISSN: 0975-1092 (Online); 0972-592X (Print)
Source:NPR Vol.7(4) [July-August 2008]

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