Chronic toxic effects of the organophosphorus insecticide chlorpyrifos (dursban) on the spawning, reproductive behavior, and early life stages of the cichlid fish tilapia

Document Type : Original Article

Author

Department of plant protection, faculty of agriculture, University of Ain shams, Egypt

10.21608/jpces.1990.460680

Abstract

The fish Tilapia zillii was exposed to sublethal concentrations of the organophosphorus insecticide chlorpyrifos (Dursban) using the continuous flow-through system to evaluate its chronic toxic effects on spawning, reproductive behavior, and early life stages of the fish. Chlorpyrifos affected spawning and reproductive behavior at concentrations as small as 3.6 ug/1. Also, survival of early life stages of T. zillii was reduced significantly at the concentration of 3.6 ug/L than at 1.7 ug/L of the control. The maximum acceptable toxicant concentration (MATC), or "no effect" level, was estimated to be between 1.7 and 3.6 ug/L and the application factor (AF) was in the range of 0.007 and 0.015, and the chronic value was 2.474 ug/1.
Journal of Pest Control and Environmental Sciences
Volume 2, Issue 1
1990
Pages 103-109

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