Investigation of acute toxicity of chlorpyrifos-methyl on guppy Poecilia reticulata |
| |
Authors: | Selvi Mahmut Sarikaya Rabia Erkoç Figen Koçak Oner |
| |
Institution: | Department of Biology Education, Gazi University, Teknikokullar, 06500 Ankara, Turkey. |
| |
Abstract: | Static bioassays were made to determine acute toxicity of chlorpyrifos-methyl, a wide spectrum organophosphorus insecticide and potential toxic pollutant of aquatic ecosystem, Guppy fish (Poecilia reticulata). Bioassays were made at a regulated temperature of 22+/-1 degrees C and were repeated three times. Lethal doses of the insecticides were determined using LC50 software programme of U.S. EPA based on Finney's Probit Analysis statistical method. The 96 h LC50 value and 95% confidence limit of chlorpyrifos-methyl for Guppy was estimated as 1.79 (1.47-2.10) mg/l. The fish exposed to chlorpyrifos-methyl exhibited behavioral changes in the form of neurotoxin toxicity: less general activity than control group, loss of equilibrium, erratic swimming and staying motionless at a certain location generally at mid-water level for prolonged periods. The 1 mg/l (lowest) concentration had similar behavior (NOEC) with the control group. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|