Abstract
Eggs of plaice, at the stage of the first heart beat, have been exposed to the water-soluble fractions (WSF) of Statfjord crude and topped (150° C) oil. The exposure time was 96 hours and the water temperature 5° C. Studies of lethality and of different physiological parameters after sublethal exposure have been done to investigate the effects of these two oil types on the pelagic eggs of plaice. The water fraction of crude oil gave the highest egg mortality and an effect on osmoregulation of the exposed embryo was found.