Acute Toxicity of Paraquat and Glyphosate on embryonic development of Climbing Perch (Anabas testudineus)

Abstract

This study examined the toxicity of paraquat and glyphosate on Anabas testudineus embryos. The embryos were treated with paraquat at 0.01, 0.03 and 0.1 mg/L, and glyphosate at 0.02, 0.05 and 0.2 mg/L. The effects of these substances were examined by monitoring the three endpoints: mortality, hatching rate and heart rate. The results showed that all concentrations of paraquat and glyphosate affected the fish embryos with increased mortality and decreased hatching rate. As compared to the control, there were no significant differences in the head and tail bud stage, somite stage, and heart rate, whereas mortality, and hatching rate showed significant difference (p<0.05). The results revealed that paraquat was more toxic than glyphosate.