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11-08-2010, 03:12 PM #1
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Maternal transfer of bioactive polychlorinated aromatic hydrocarbons in spawning chin
By Gerald T. Ankley, Donald E. Tillitt, John P. Giesy
Marine Environmental Research, Volume 28, Issues 1-4, Responses of Marine Organisms to Pollutants, 1989, Pages 231-234, ISSN 0141-1136, DOI: 10.1016/0141-1136(89)90235-3.
The biological potency (relative to 2,3,7,8-tetrachlorodibenzo-p-dioxin. TCDD) of planar polychlorinated aromatic hydrocarbons (PCHs) in extracts of eggs and flesh from spawning female chinook salmon (Oncorhynchus tschawytscha) from Lake Michigan was determined by measuring the induction of 7-ethoxyresorufin O-deethylase activity in H-4-II-E rat hepatoma cells. TCDD-equivalents in flesh and egg samples ranged from 0 to 115[middle dot]8 pg/g, and were approximately 5-fold greater in eggs than in flesh. These results suggest that the maternal transfer of PCHs may play a role in determining the reproductive success of Lake Michigan chinook salmon.