Fig. 6: Exposure durations.
From: Oil droplets are severely overlooked in risk assessments
Left: Exposure durations for accumulated droplet mass (yellow) and droplet oil (orange) for a given exposure duration of dissolved oil, showing that droplet exposure duration increases when considering accumulation. Eggs considered when calculating the durations are those in the highest exposed half of all exposed eggs, obtained by applying the medians in Fig. 5 as exposure thresholds. Eggs are categorized into bins of 0.5 days according to their dissolved exposure duration, with the mean and standard deviation calculated for each of these bins. The dashed line shows an exposure duration equal to that of dissolved oil. Right: Histogram of exposure durations for accumulated droplet mass when considering the highest exposed half, showing that the most common duration is 10 days. Note that the exposure duration for accumulated mass is the time from the mass surpasses the threshold of 6.3 µg (median in Fig. 5) and until hatching.
