Dispersant application increases adverse long-term effects of oil on shrimp larvae (Pandalus borealis) after a six hour exposure

Keitel-Gröner, Frederike; Arnberg, Maj; Bechmann, Renée K.; Lyng, Emily; Baussant, Thierry

Dispersant application increases adverse long-term effects of oil on shrimp larvae (Pandalus borealis) after a six hour exposure

2020

Keitel-Gröner, Frederike | Arnberg, Maj | Bechmann, Renée K. | Lyng, Emily | Baussant, Thierry

The application of chemical dispersants is one option of oil spill response (OSR). Here, Northern shrimp (Pandalus borealis) larvae were experimentally exposed for short periods (6 h and 1 h) to a realistic concentration of chemically dispersed oil (CDO) (~10 mg L⁻¹ THC), mechanically dispersed oil (MDO) (~7 mg L⁻¹ THC), and dispersant only (D). A control (C) with seawater served as reference. Short-term effects on survival and feeding were examined right after exposure and longer-term consequences on survival, feeding, growth and development following 30 days of recovery. Both exposure durations provoked long lasting effects on larval fitness, with 1 h exposure leading to minor effects on most of the selected endpoints. The 6 h exposure affected all endpoints with more adverse impacts after exposure to CDO. This study provides important data for assessing the best OSR option relevant to NEBA (Net Environmental Benefit Analysis).

Показать больше [+]