| Abstract: | The absorption rates of five halogenated phenols across the gill epithelium of freshwater- and seawater-adapted rainbow trout was measured. At pH6, when the compounds mainly are present in the non-ionized form, the absorption rates in fresh water were higher than in seawater. At pH 9 no differences in absorption rates between the two water qualities were observed for those phenols present in ionized form. It is concluded that adaptation to seawater to some extent reduces the permeability of the gills for the nonionized forms of the compounds. |
