Alterações morfológicas em prole de peixes Poecilia reticulata Peters1859 (Cyprinodontiformes, Poeciliidae) expostos a glifosato no período de reprodução

Abstract

The most sold pesticides worldwide are glyphosate-based, with emphasis on the commercial product ROUNDUP® WG. Its high demand in agriculture must be due to its wide spectrum of action. Although this compound is known to be of low harm to mammals, the effects on aquatic organisms are still little known. Therefore, the present study evaluated the use of glyphosate in the cultivation of ornamental fish (Poecilia reticulata) and its effects on the profile. The experimental design consisted of two phases. In phase I, 108 copies of the species were used, housed in 6 experimental units with a useful volume of 10 L each, with 3 control treatments and 3 test treatments (Roundup 1 mg.L-1) with a density of 18 fish per experimental unit. At this stage, the cultivation and reproduction of the specimens was carried out. In phase II, a profile resulting from the reproduction of phase I was maintained for 30 days in a glyphosate-free environment, and the continuous effects of the previous phase on the development of juveniles were observed, using as markers the morphological effects on gill, liver, intestine and kidney. When analyzing the results obtained, no changes were identified in the gills, liver and intestine of the offspring, resulting from the, but were observed in the profile kidney, represented by tubular degeneration, necrosis and the presence of cellular material inside the renal tubules. Theresults indicate that the exposure of parental fish to glyphosate during the stages of gonadal maturation, reproduction and embryonic development caused interference in thedevelopment of the profile, meaning that the presence of the compound may have moldological and functional effects on this species over generations.