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MATERNAL TRANSFER OF BIOACTIVE POLYCHLORINATED AROMATIC HYDROCARBONS IN SPAWNING CHINOOK SALMON (ONCORHYNCHUS TSCHAWYTSCHA)
Citation:
Ankley, G., D. Tillit, AND J. Geisy. MATERNAL TRANSFER OF BIOACTIVE POLYCHLORINATED AROMATIC HYDROCARBONS IN SPAWNING CHINOOK SALMON (ONCORHYNCHUS TSCHAWYTSCHA). U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-89/483 (NTIS PB91117556).
Description:
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. CDD-equivalents in flesh and egg samples ranged from 0 to 115.8 pg/g, and were approximately 5-fold greater in eggs than in flesh. hese results suggest that the maternal transfer of PCHs may play a role in determining the reproductive success of Lake Michigan chinook salmon.