Toxicity of Selenomethionine-and Seleno-Contaminated Sediment to the Amphipod Corophium sp.

摘要

The acute toxicity of four chemical species of selenium to juvenile amphipods (Corophium sp.) was assessed in water-only tests. The seleno-amino acid compounds seleno-L-methionine and seleno-DL-cystine were found to be more toxic (96-h LC_(50) values of 1.5 and 12.7 μg Se/L) than the inorganic selenite and selenate (96-h NOEC values of 58 and 116μg Se/L). New marine sediment testing procedures were developed using juvenile and adult Corophium sp. Both life stages were highly sensitive to seleno-L-methionine-spiked sediment. The juveniles were ap- proximately five times more sensitive, with a 10-day LC_(50) of 1.6 μg Se/g (dry weight) compared to 7.6 μg Se/g (dry weight) for the adults.