Publications by authors named "Francisco Estevao Carneiro"
Synthetic glucocorticoids are often found in surface waters and can cause harmful effects to aquatic organisms such as amphibians. In this work we evaluated the effects of the drugs prednisone (PD) and prednisolone (PL) on developmental, molecular, blood, biochemical and histological markers. Aquarana catesbeianus tadpoles were exposed for 16 days to environmentally relevant concentrations of 0, 0.
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- The study investigated how temperature (25 and 32 °C) influences the response of bullfrog tadpoles to different concentrations of the atrazine metabolite 2-hydroxyatrazine (2-HA) over 16 days.
- The results showed that 2-HA reduced the activity of the enzyme superoxide dismutase (SOD) at 25 °C and caused liver and kidney damage, particularly affected by higher temperatures.
- Overall, the findings suggest that environmentally relevant levels of 2-HA can impact biomarker responses and organ morphology in tadpoles, with temperature playing a significant role in these alterations.
In this study the effects of environmentally realistic concentrations of the antibiotics sulfamethoxazole (SMX) and oxytetracyclyne (OTC) on Lithobates catesbeianus tadpoles were evaluated, through the analyzes of the frequencies of micronucleus and nuclear abnormalities in erythrocytes, alterations in leucocytes, liver histopathology, and changes in hepatic esterase activities and oxidative stress biomarkers. The animals were exposed for 16 days at concentrations of 0 (control), 20, 90 and 460 ng L. No significant difference was found in the frequencies of micronucleus and nuclear abnormalities.
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