Research Product

Mysids (Mysidopsis bahia) of three ages (<= 1-, 5-, and 10-d-old at test initiation) were confined within the same aquaria and exposed to measured concentrations of malathion, tetrabromobisphenol-A, and tributyltin chloride in separate 96-hr acute toxicity tests. Sensitivities of the three age groups were similar. Ninety-six hour LC50 values ranged from 2.6 to 3.1 µg/L for malathion and from 1.1 to 2.2 µg/L for tributyltin chloride. The 96-hr LC50 for <= 1-d-old mysids exposed to tetrabromobisphenol-A was 860 µg/L, and approximately 50% of the 5- and 10-d-old mysids died at 1150 µg/L.