Dietary absorption efficiencies and elimination rates of polycyclic aromatic hydrocarbons (PAHs) in rainbow trout (salmo gairdneri)

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Abstract
Dietary absorption efficiencies and elimination rates of acenaphthylene, 1‐phenyl naphthalene, 2‐methyl anthracene, 9‐methyl anthracene, triphenylene, perylene, benzo[b]fluorene, dibenzo[a,h]anthracene, benzo [ghi]perylene and coronene were examined in rainbow trout. Subadult fish were exposed to 10 mg of each chemical over 5 d and polycyclic aromatic hydrocarbon (PAH) levels were monitored during the following 25 d. The results indicated that PAHs were not accumulated by trout through dietary exposure because of the combined effects of poor absorption efficiencies and rapid elimination rates. Phenyl naphthalene was more persistent than the other PAHs examined, with a half‐life of 25 d.