Publications by authors named "Jian Hong Qu"
Tilapia were exposed to sub-lethal concentrations of 0, 0.2, 2, 20 or 200 μg/L for 30 days, then transferred to methomyl-free water for 18 days. E , T, 11-KTand VTG in serum were examined.
View Article and Find Full Text PDFTilapia were exposed to sublethal methomyl concentrations of 0, 0.2, 2, 20 or 200 μg/L for 30 days, and then transferred to methomyl-free water for 18 days. The sexual steroid hormones 17β-estradiol (E2), testosterone (T), and 11-ketotestosterone (11-KT) in tilapia testes were examined at 0, 6, 12, 18, 24 and 30 days after methomyl exposure, and at 18 days after fish were transferred to methomyl-free water.
View Article and Find Full Text PDFArticle Synopsis
- At low concentrations (0.2 and 2 μg/L), there were no significant changes in gene expression linked to their endocrine system, while higher concentrations (20 and 200 μg/L) caused notable disruptions in hormone-related genes, leading to reproductive issues.
- Recovery tests indicated that the harmful effects from 20 μg/L of methomyl were reversible, but those from 200 μg/L resulted in irreversible endocrine disruption in male tilapia.
Article Synopsis
- The study researched how the antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT) in Nile tilapia respond to exposure to different concentrations of the pesticide methomyl over 30 days.
- Results indicated that SOD and CAT activities were significantly impacted at higher methomyl concentrations (2, 20, and 200 μg/L), while the lowest concentration (0.2 μg/L) did not show a significant effect, suggesting it might be a safe level.
- After transferring the fish to methomyl-free water, SOD recovery was only observed at the lower concentration (2 μg/L), while CAT effects were reversible across all tested concentrations, indicating that CAT is more resilient to
Tilapia were exposed to sublethal concentrations of 0, 0.2, 2, 20, or 200 μg/L for 30 days, and then transferred to methomyl-free water for 18 days. GST, GPx, GR, GSH, and GSSG in tilapia serum were examined at 0, 6, 12, 18, 24, and 30 days after methomyl exposure and at 18 days after transferring to methomyl-free water.
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