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Assessment of River Water Quality in an Agricultural Region of Brazil Using Biomarkers in a Native Neotropical Fish, Astyanax spp. (Characidae)

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Abstract

Intensive agricultural and livestock activities demand high pesticide use and, consequently, contaminants reach aquatic ecosystems. In the lower Jacuí River, southern Brazil, there is a lack of knowledge about pesticide residues in water samples and the biochemical responses in native fish species. Thus, this study aimed to estimate the influence of pesticide residues and water parameters to biomarker responses in the native fish Astyanax spp. We performed seasonal biomonitoring in 2017 with water samples and fish collections. Biomarkers of oxidative stress, antioxidants, biotransformation, and neurotoxicity were analyzed in fish tissues. Fourteen pesticide residues were detected; they presented correlations with detoxification enzyme and oxidative stress biomarkers. These data indicate that most of variations can be related to the pesticide presence in water indicating high aquatic pollution in this place.

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Acknowledgement

This work was partially supported by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brazil (CAPES) – Finance Code 001. Vania Lucia Loro received a research fellowship from CNPq (National Research Council), Process Number: 309314/2017-8. Aline Teixeira Marins received a doctoral fellowship from CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior). The authors would like to thank Pedro Henrique Pinto Leão, Rudy Beskow, and Renata Teixeira Marins for technical support. Special thanks to the citizens of the Cachoeira do Sul city.

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Correspondence to Vania Lucia Loro.

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Marins, A.T., Severo, E.S., Leitemperger, J.W. et al. Assessment of River Water Quality in an Agricultural Region of Brazil Using Biomarkers in a Native Neotropical Fish, Astyanax spp. (Characidae). Bull Environ Contam Toxicol 104, 575–581 (2020). https://doi.org/10.1007/s00128-020-02821-0

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  • DOI: https://doi.org/10.1007/s00128-020-02821-0

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