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Effects of short-term exposure to a pesticide mixture on free-swimming behavior in goldfish, Carassius auratus

2023; Elsevier BV; Volume: 11; Linguagem: Inglês

10.1016/j.hazadv.2023.100350

2772-4166

Esmirna Cantu, Michelle Rivera, Brittney Lacy, Md Saydur Rahman,

Physiological and biochemical adaptations

The prevalence of pesticides in the aquatic environment continues to increase due to anthropogenic activities and poses a threat to aquatic organisms. Notably, the intensive use of pesticides can cause detrimental effects (i.e., chemical stressors) on animal behavior. The aim of this study was to determine the short-term exposure effects (5-day) of an environmentally relevant pesticide mixture (low- and high-dose: metolachlor 2.4 and 12 μg/L; linuron 2.0 and 10 μg/L; isoproturon 1.2 and 6.0 μg/L; tebucanazole 1.2 and 6.0 μg/L; alconifen 0.8 and 4.0 μg/L; atrazine 0.4 and 2.0 μg/L; pendimethalin; 0.4 and 2.0 μg/L; azinphos-methyl 0.8 and 4.0 μg/L) on fish swimming behaviors. Results indicated that a low dose of pesticide mixture decreased the distance swam in goldfish. Spatial behavior use was also altered during short-term pesticide exposure, with increased time spent in the lowest horizontal region in aquariums in both low- and high-dose exposure groups. In vertical spatial use analysis, all exposure groups showed lowered amounts of time spent in the middle region in aquariums, especially in high-dose exposure groups. Collectively, these data indicate that short-term exposure to pesticide mixture significantly alters free-swimming behavior in teleost species.