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from either: (a) water only - the
predominant route of exchange during acute exposures, or (b) water and food
jointly - characteristic of chronic exposures.
FGETS calculates time to reach the chemical's lethal activity by assuming the
chemical elicits its pharmacological response through a narcotic mode of action.
FGETS considers both the biological attributes of the fish and the physico-
chemical properties of the chemical that determine diffusive exchange across
gill membranes and intestinal mucosa.
Important biological characteristics
addressed by model are the fish's gill and intestinal morphometry, the body
weight of the fish, and fractional aqueous, lipid, and structural organic
composition.
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