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Hepatic mixed-function oxidases in California flatfishes are increased in contaminated environments and by oil and PCB ingestion

Hepatic mixed-function oxidases (MFOs) were measured in the bothid flatfish Citharicthys sordidus and C. stigmaeus from relatively uncontaminated and from polluted coastal populations of California, USA, at various times of the year during 1979-1980 and in individuals fed crude oil and polychlorinat...

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Bibliographic Details
Published in:Marine biology 1982-01, Vol.70 (2), p.117-127
Main Authors: Spies, R.B, Felton, J.S, Dillard, L
Format: Article
Language:English
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Summary:Hepatic mixed-function oxidases (MFOs) were measured in the bothid flatfish Citharicthys sordidus and C. stigmaeus from relatively uncontaminated and from polluted coastal populations of California, USA, at various times of the year during 1979-1980 and in individuals fed crude oil and polychlorinated biphenyl-augmented food in the laboratory. For C. sordidus , aryl hydrocarbon hydroxylase (AHH) specific activity was generally highest around the Los Angeles County sewage outfall on the Palos Verdes Shelf, intermediate near the 7-mile Hyperion sewage outfall in Santa Monica Bay around a petroleum seep in Santa Barbara Channel, and lowest in relatively unpolluted Monterey Bay. For C. stigmaeus , which had about ten times less specific activity than the foregoing species, specimens from the Santa Barbara petroleum seep had significantly greater AHH specific activity than those from Monterey Bay. Fishes from contaminated environments also showed increased of microsomal proteins with molecular weights of 56, 54, 57 and 46 x 10 super(3); moreover, the content of cytochrome P-450 was elevated in specimens of C. sordidus) from such environments.
ISSN:0025-3162
1432-1793
DOI:10.1007/BF00397675