|Document Type:||Journal Article|
|Title:||Dose/dose-rate responses of shrimp larvae to UV-B radiation|
|Author:||David M. Damkaer, Douglas B. Dey, G. A. Heron|
Previous work indicated dose-rate thresholds in the effects of UV-B on the near-surface larvae of three shrimp species. Additional observations suggest that the total dose response varies with dose-rate. Below 0.002 Wm–2[DNA] irradiance no significant effect is noted in activity, development, or survival. Beyond that dose-rate threshold, shrimp larvae are significantly affected if the total dose exceeds about 85 Jm–2[DNA]. Predictions cannot be made without both the dose-rate and the dose. These dose/dose-rate thresholds are compared to 4-year mean dose/dose-rate solar UV-B irradiances at the experimental site, measured at the surface and calculated for 1-m depth. The probability that the shrimp larvae would receive lethal irradiance is low for the first half of the season of surface occurrence, even with a 44% increase in damaging UV radiation.