Effect of Corexit alone and in Combination with DWH Mousse Upon Zebrafish Embryo Mortality: Direct Contact and Non-Contact Exposures to Mousse

The purpose of this dataset was to examine: 1) if Corexit alone in the water at 0.0, 0.3, 3.0 and 100 mg/l concentrations elicits toxicity; 2) if direct contact to mousse or non-contact with mousse with water as the intermediate interface with embryos influences toxicity to the mousse and 3) to determine if Corexit concentration influences the mortality for either exposure modality. Mortality was not significantly increased by increasing concentrations of Corexit from 0.0 to 100 mg / l. Mortality was much higher for the direct contact exposures than the non-contact exposures during the 192 hour observation interval. This relates to a greater toxicity of direct contact exposures. Corexit did not alter the low 192 hr mortality incidence for non-contact exposures but was altered at the highest Corexit concentration of 100mg/ l.

本数据集旨在探究以下三项科学问题：1）水体中单独存在的科里克斯（Corexit），在0.0、0.3、3.0及100 mg/L浓度下是否会引发毒性效应；2）胚胎直接接触油泡沫（mousse），或以水作为胚胎与油泡沫之间的中间界面的非直接接触方式，是否会对油泡沫产生毒性影响；3）明确科里克斯浓度是否会对两种暴露方式下的受试个体死亡率产生影响。实验结果显示：当科里克斯浓度从0.0提升至100 mg/L时，受试个体死亡率未出现显著升高。在192小时的观测周期内，直接接触暴露组的死亡率远高于非接触暴露组，这提示直接接触暴露的毒性更强。科里克斯并未改变非接触暴露组的192小时低死亡率水平，但在最高浓度100 mg/L时，该死亡率水平出现了变化。