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Endocrine dysfunction in seabirds caused by ingested oil

Journal Article · · Environ. Res.; (United States)
In laboratory and field experiments, a single oral dose (0.1 to 1.0 ml) of certain crude oils or aromatic fractions caused elevated plasma corticosterone and thyroxine levels in nestling herring gulls and black guillemots. In gulls, plasma corticosterone levels were elevated within 1 day after dosing; the maximal effect was observed after 4 days and levels returned to control values after 2 weeks. Thyroxine levels did not increase until 6 days after dosing and they remained elevated after 2 weeks. Since only those oils which reduced seabird growth rates affected hormone levels, the data suggest that disruption of endocrine balance is one underlying cause of depressed growth in oil-dosed birds.
OSTI ID:
6537264
Journal Information:
Environ. Res.; (United States), Journal Name: Environ. Res.; (United States) Vol. 24:1; ISSN ENVRA
Country of Publication:
United States
Language:
English