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Bioaccumulation in fish: The bioconcentration study investigated the possible bioconcentration of FR-720 in Carp exposed to two different concentrations (Level 1: 15 µg/L; Level 2: 1.5 µg/L) or a period of 28 days in a flow through system.

Comparison of the results (BCF Level 1: 3.4 -43; Level 2: 17 -130) at the two concentrations tested showes that FR-720 has only a slight potency for bioconcentration in fish.

Bioaccumulation in earthworm: there was no evidance of substance absorbance into the earthworm's tissue.Therefore, no bioaccumulation was evident.