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Atrazine levels in the Jaboticabal water stream (São Paulo State, Brazil) and its toxicological effects on the pacu fish Piaractus mesopotamicus / Razine atrazina u vodotoku Jaboticabal (São Paulo, Brazil) i njihovi toksikološki učinci na ribu Piaractus mesopotamicus Cover

Atrazine levels in the Jaboticabal water stream (São Paulo State, Brazil) and its toxicological effects on the pacu fish Piaractus mesopotamicus / Razine atrazina u vodotoku Jaboticabal (São Paulo, Brazil) i njihovi toksikološki učinci na ribu Piaractus mesopotamicus

Open Access
|Mar 2015

Abstract

The aim of this study was to determine the environmental concentration of atrazine (ATZ) in five streams located in the north of São Paulo state (Brazil) and evaluate its toxicological impact on young specimens of the pacu fish Piaractus mesopotamicus. Samples of water were collected on three occasions between 2010 and 2011, corresponding to periods signifying the beginning, middle, and end of rain season. ATZ levels were estimated by a high-performance liquid chromatography coupled with a mass spectrometry (HPLC-MS/MS) triple quadrupole. Later, the quotient of environmental risk (QR) was determined based on the medium lethal concentration (LC50 48 h), non-observable effect concentration (NOEC), and the estimated environmental concentration (EEC) of ATZ detected in the environment. Histological changes in gills and liver were also studied, along with the brain activity of the enzyme acetylcholinesterase (AChE). The highest concentration of ATZ measured was 10.4 μg L-1. The ATZ LC50 (48 h) for young P. mesopotamicus was 24.46 mg L-1 and the QR was classified as “safe”. Although the QR indicated that ATZ could be safe for the tested species, it caused many histological alterations in the liver and gills of the exposed specimens, and an increase in the AChE levels.

DOI: https://doi.org/10.1515/aiht-2015-66-257 | Journal eISSN: 1848-6312 | Journal ISSN: 0004-1254
Language: English, Croatian, Slovenian
Page range: 73 - 82
Submitted on: Sep 1, 2014
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Accepted on: Mar 1, 2015
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Published on: Mar 27, 2015
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2015 Edson Aparecido dos Santos, Claudinei da Cruz, Silvia Patrícia Carraschi, José Roberto Marques Silva, Rafael Grossi Botelho, Edivaldo Domingues Velini, Robinson Antonio Pitelli, published by Institute for Medical Research and Occupational Health
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.