Acute Toxicity Assessment of Diazinon on Nile Tilapia Juveniles and Freshwater Prawns
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Abstract
The application of pesticides in agricultural practices, particularly in rice cultivation, has significant impacts on freshwater ecosystems and poses risks to the survival of various aquatic organisms. This study aimed to evaluate the acute toxicity of the pesticide diazinon on juvenile Nile tilapia (Oreochromis niloticus) and freshwater prawns (Macrobrachium lanchesteri). A static bioassay was conducted to determine the concentration causing 50% mortality within 96 hours (96hr-LC50), and the data were analyzed using probit analysis. The results revealed that the 96hr-LC50 values for juvenile Nile tilapia and freshwater prawns were 14.67 and 1.39 ppm, respectively. These findings can be utilized to establish safe concentration thresholds of diazinon in natural water bodies, providing essential data for ecological risk assessment and supporting the formulation of environmentally sustainable pesticide management strategies in agriculture.
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สถาบันวิจัยและพัฒนาประมงน้ำจืดแห่งชาติ. 2530. เกณฑ์คุณภาพน้ำเพื่อคุ้มครองทรัพยากรสัตว์น้ำจืด. เอกสารวิชาการ ฉบับที่ 75/2530. กรุงเทพฯ : กรมประมง, กระทรวงเกษตรและสหกรณ์.
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