Influence of the organophosphorus insecticide phosphamidon on lentic water.

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dc.contributor.authorDhar, Gopalen_US
dc.contributor.authorBarat, Sudipen_US
dc.contributor.authorDhar, Kakali Mitraen_US
dc.date.accessioned2004-07-26en_US
dc.date.accessioned2009-06-02T04:05:25Z
dc.date.available2004-07-26en_US
dc.date.available2009-06-02T04:05:25Z
dc.date.issued2004-07-26en_US
dc.description.abstractThe inland freshwater resources are being increasingly subjected to heavy stress as a result of indiscriminate dumping of industrial wastes, domestic sewage and agricultural run-off causing deterioration of the water quality and adverse impact on aquatic biota. Pesticides drained to the aquatic environment are primarily of agricultural origin. Phosphamidon (widely used organophosphate pesticide in paddy field) significantly reduced dissolved oxygen (DO) at 1.8 mg/l exposure and reduced alkalinity at 0.9 and 1.8 mg/l. Hardness also reduced gradually but not significantly. Free carbondioxide was increased significantly at 1.8 mg/l of the insecticide compared to control. The insecticide had no influence on pH and temperature. There was maximum reduction of phytoplankton and zooplankton population at 1.8 mg/l of phosphamidon. Though gradual reduction of plankton community was also noticed at different lower concentrations of pesticides but in case of phytoplankton an abrupt reduction (about 50% of the control) was observed. The normal behaviour and feeding rate of air breathing teleost, Channa punctatus was also hampered. Therefore, phosphamidon even at low concentrations may create disorders in the aquatic ecosystem.en_US
dc.description.affiliationAquaculture and Limnology Laboratory, Department of Zoology, University of North Bengal-734 430, District Darjeeling, India.en_US
dc.identifier.citationDhar G, Barat S, Dhar KM. Influence of the organophosphorus insecticide phosphamidon on lentic water. Journal of Environmental Biology. 2004 Jul; 25(3): 359-63en_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/113525
dc.language.isoengen_US
dc.source.urihttps://www.geocities.com/j_environ_biol/en_US
dc.subject.meshAnimalsen_US
dc.subject.meshDose-Response Relationship, Drugen_US
dc.subject.meshEcosystemen_US
dc.subject.meshEnvironmental Monitoringen_US
dc.subject.meshFresh Water --chemistryen_US
dc.subject.meshHydrogen-Ion Concentrationen_US
dc.subject.meshIndustrial Wasteen_US
dc.subject.meshInsecticides --toxicityen_US
dc.subject.meshOrganophosphorus Compounds --toxicityen_US
dc.subject.meshOxygen --metabolismen_US
dc.subject.meshPhosphamidon --toxicityen_US
dc.subject.meshPhytoplankton --drug effectsen_US
dc.subject.meshSewage --chemistryen_US
dc.subject.meshTemperatureen_US
dc.subject.meshWater Pollutants, Chemical --toxicityen_US
dc.subject.meshZooplankton --drug effectsen_US
dc.titleInfluence of the organophosphorus insecticide phosphamidon on lentic water.en_US
dc.typeJournal Articleen_US
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