Effects of sublethal and realistic concentrations of the commercial herbicide atrazine in Pacu (Piaractus mesopotamicus ): Long-term exposure and recovery assays

Veterinary World
Mariana Cruz DelcorsoSarah Arana

Abstract

The commercial formulations of the herbicide atrazine (cATZ) are widely employed in Brazilian agriculture, and, as a consequence, ATZ has been found at levels above that established by law in the river basins in Brazil. Although the toxicity of ATZ in fish is well documented, there are few studies on the recovery capacity after cATZ exposure. This work aimed to evaluate, using several biomarkers, the toxic effects of long-term exposure to the sublethal (3.57 mg/L) and nonlethal realistic (3.00 µg/L) cATZ concentrations followed by a recovery assay, in fingerlings of a Brazilian teleost, the Piaractus mesopotamicus (pacu). Pacu fingerlings were housed in glass tanks and divided into the following experimental groups (two tanks/group): Exposure control = EC, recovery control = RC, the sublethal groups exposed to 3.57 mg/L of cATZ, (sublethal exposure group = SLE and sublethal recovery group = SLR) and the nonlethal groups treated with 3.00 µg/L of cATZ (nonlethal exposure group = NLE and nonlethal recovery group = NLR). The exposure assay was semi-static with a duration of 30 days and the recovery assay (after cATZ withdrawal) lasted 14 days. Several biomarkers were evaluated in fingerlings from all groups: The swimming behavior,...Continue Reading

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Citations

May 6, 2021·Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology·Anderson K S MacêdoRalph G Thomé
Jun 3, 2021·Animals : an Open Access Journal From MDPI·Abdel-Wahab A Abdel-WarithMahmoud A O Dawood

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Methods Mentioned

BETA
electron microscopy
Light microscopy

Software Mentioned

Image Pro - Plus
GraphPad Prism
GraphPad

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