Publications by authors named "Daiane Bitschinski"
Exposure to pesticides used in rice farming (bentazone, chlorantraniliprole and tebuconazole) affects biochemical biomarkers and hepatic histopathological parameters of hammertoad tadpoles (Boana faber).
Comp Biochem Physiol C Toxicol Pharmacol
September 2024
Article Synopsis
- Pesticides from rice farming can harm non-target organisms, impacting biodiversity, leading researchers to study their presence in river water and their effects on Boana faber tadpoles.
- The study found no major developmental issues in tadpoles but noted increased malondialdehyde (MDA) levels indicating oxidative stress after pesticide exposure, particularly with herbicide BTZ and fungicide TBZ.
- Histological examinations revealed significant changes in the tadpoles, such as inflammation and liver enzyme activity alterations, highlighting the negative impact of rice pesticides on local aquatic ecosystems and biodiversity.
Prednisone and prednisolone effects on development, blood, biochemical and histopathological markers of Aquarana catesbeianus tadpoles.
Aquat Toxicol
March 2024
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.
View Article and Find Full Text PDFIntegrating pollutant levels and biochemical biomarkers in oysters (Crassostrea rhizophorae and Crassostrea gasar) indicates anthropic impacts on marine environments along the coast of Santa Catarina state, Brazil.
Mar Environ Res
February 2024
This study aimed to carry out a general diagnosis of the contamination of the coastal marine environment of the Santa Catarina state (SC, Brazil) by different classes of environmental pollutants, as well as to evaluate possible adverse effects of the contaminants on biochemical biomarkers of oysters, Crassostrea gasar and Crassostrea rhizophorae. 107 chemicals were evaluated in water, sediment and oyster samples from nine sites along the coastline of SC. We also examined various biochemical biomarkers in the oysters' gills and digestive glands to assess potential effects of contaminants.
View Article and Find Full Text PDFTebuconazole (TBZ) and azoxystrobin (AZX) are fungicides frequently used in rice cultivation. Despite protecting crops against fungal diseases, these compounds can contaminate the natural environments close to the crops, exerting negative effects on non-target organisms, the present study aimed to characterize the contamination by fungicides of a river that flows in an area dominated by rice cultivation in the north of the state of Santa Catarina, SC, Brazil. Concentrations of TBZ and AZX found in the field were used to evaluate their negative effects on development, biochemical biomarkers and histopatology of the liver of a native tadpole species, the hammerfrog (Boana faber).
View Article and Find Full Text PDFArticle Synopsis
- 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.
Thyroid hormones (TH) are essential for the metamorphosis of amphibians and their production can be influenced by environmental stressors, such as temperature fluctuations, and exposure to aquatic pollutants, such as herbicides. In the present study we evaluated the influence of different temperatures (25 and 32 °C) on the effects of the herbicide ametryn (AMT, 0 - control, 10, 50 and 200 ng.L) for 16 days on thyroidogenesis of bullfrog tadpoles.
View Article and Find Full Text PDFArticle Synopsis
- The study investigates the impact of the herbicide ametryn (AMT) on bullfrog tadpoles, focusing on how different temperature levels (25 and 32 °C) influence biochemical responses to AMT exposure over 16 days.
- At 32 °C, the tadpoles showed decreased activity of important antioxidant and biotransformation enzymes, particularly at the highest concentrations of AMT (200 ng.L).
- While some enzymatic activities were affected, others, including genotoxic markers, remained unchanged; the research suggests that higher temperatures and AMT levels collectively amplify negative effects on tadpoles.
The influence of temperature (25 and 32 °C) on the negative effects of the herbicide tebuthiuron (TBU, 0, 10, 50 and 200 ng.L-1, 16 days) on thyroid function and metamorphosis of Lithobates catesbeianus tadpoles was evaluated. Metamorphosis was accelerated by TBU exposure at 25 ºC, but delayed at 32 ºC with considerable losses of body mass.
View Article and Find Full Text PDFArticle Synopsis
- Tebuthiuron (TBU) is a widely used herbicide in sugarcane fields that poses risks to aquatic life, particularly bullfrog tadpoles, due to its slow degradation and water solubility.
- The study examined how varying temperatures (25 and 32 °C) affected the harmful impacts of TBU on bullfrog tadpoles, with increases in TBU concentration (0, 10, 50, and 200 ng/L) leading to significant changes in enzyme and gene activity related to metabolism and antioxidant defense.
- The findings revealed that both TBU exposure and elevated temperature disrupted the tadpoles' metabolic balance, resulting in altered biomarker responses and liver damage, specifically at higher TBU concentrations