Abstract
Sediments of Pryor Creek, Oklahoma, USA, are polluted with polychlorinated biphenyls (PCBs) from an industrial source. PCBs enter the stream as rainfall erodes a mixture of clay and paper pulp containing PCBs. Concentrations of PCBs in the sediments ranged from 0·23 to 7·20 μg/g, but no PCBs have been detected in the water. No correlation was found between PCB concentrations in sediments and downstream distance. PCB levels in sediments were significantly greater (0·05 < p < 0·01) at areas of increased sediment deposition. Concentrations of PCBs in fish fillets were significantly greater (0·05 < p < 0·01) in detritivores than in either omnivores or predators. No significant difference was found between omnivores and predators. PCB concentrations in fillets from two species were found to be significantly correlated with either body weight, lipid content, or both. Concentration factors for fish fillets ranged from 0·319 for white crappie (Pomoxis annularis) up to 10·319 for river carpsucker (Carpiodes carpio).
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