Sumon Kizar Ahmed, Saha Sampa, van den Brink Paul J, Peeters Edwin T H M, Bosma Roel H, Rashid Harunur
a Department of Aquatic Ecology and Water Quality Management , Wageningen University, Wageningen University and Research Centre , Wageningen , The Netherlands.
b Department of Fisheries Management , Bangladesh Agricultural University , Mymensingh , Bangladesh.
J Environ Sci Health B. 2017 Feb;52(2):92-98. doi: 10.1080/03601234.2016.1239979. Epub 2016 Oct 24.
This study elucidated the acute toxicity of chlorpyrifos on the early life stages of banded gourami (Trichogaster fasciata). To determine the acute effects of chlorpyrifos on their survival and development, we exposedthe embryos and two-day-old larvae to six concentrations (0, 0.01, 0.10, 1.0, 10 and 100 µg L) of chlorpyrifos in plastic bowls. Log-logistic regression was used to calculate LC10 and LC50 values. Results showed that embryo mortality significantly increased with increasing chlorpyrifos concentrations. The 24-h LC10 and LC50 values (with 95% confidence limits) of chlorpyrifos for embryos were 0.89 (0.50-1.58) and 11.8 (9.12-15.4) µg L, respectively. Hatching success decreased and mortality of larvae significantly increased with increasing concentrations of chlorpyrifos. The 24-h LC10 and LC50 values (with 95% confidence limits) of chlorpyrifos for larvae were 0.53 (0.27-1.06) and 21.7 (15.9-29.4) µg L, respectively; the 48-h LC10 and LC50 for larvae were 0.04 (0.02-0.09) and 5.47 (3.77-7.94) µg L, respectively. The results of this study suggest that 1 µg L of chlorpyrifos in the aquatic environment may adversely affect the development and the reproduction of banded gourami. Our study also suggests that banded gourami fish can serve as an ideal model species for evaluating developmental toxicity of environmental contaminants.
本研究阐明了毒死蜱对条纹丝足鲈（Trichogaster fasciata）早期生命阶段的急性毒性。为确定毒死蜱对其生存和发育的急性影响，我们将胚胎和两天大的幼鱼置于塑料碗中，暴露于六种浓度（0、0.01、0.10、1.0、10和100微克/升）的毒死蜱环境中。采用对数逻辑回归计算LC10和LC50值。结果表明，随着毒死蜱浓度的增加，胚胎死亡率显著上升。毒死蜱对胚胎的24小时LC10和LC50值（95%置信区间）分别为0.89（0.50 - 1.58）和11.8（9.12 - 15.4）微克/升。随着毒死蜱浓度的增加，孵化成功率降低，幼鱼死亡率显著上升。毒死蜱对幼鱼的24小时LC10和LC50值（95%置信区间）分别为0.53（0.27 - 1.06）和21.7（15.9 - 29.4）微克/升；对幼鱼的48小时LC10和LC50值分别为0.04（0.02 - 0.09）和5.47（3.77 - 7.94）微克/升。本研究结果表明，水环境中毒死蜱浓度达1微克/升可能会对条纹丝足鲈的发育和繁殖产生不利影响。我们的研究还表明，条纹丝足鲈可作为评估环境污染物发育毒性的理想模式物种。
