Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 1117
Title: Copper-induced olafactory toxicity in salmon and steelhead: extrapolation across species and rearing environments
Author: D. H. Baldwin, C. P. Tatara, N. L. Scholz
Publication Year: 2011
Journal: Aquatic Toxicology
Volume: 101
Issue: 1
Pages: 295-297

Recent research has shown that hatchery coho salmon (Oncorhynchus kisutch) are vulnerable to the olfactory neurotoxicity caused by copper from urban runoff, pesticide use, and mining activities.  To explore the broader application of this data to salmonids living in the wild, we exposed naturally reared steelhead (O. mykiss) to copper (5 and 20 µg/L; 3 h) and measured losses in olfactory function via electro-olfactogram (EOG) recordings.  Copper exposure disrupted the olfactory responsiveness of steelhead to an amino acid (L-serine) in a dose-dependent manner that was equivalent to previously published data for hatchery coho.  Our findings support extrapolation of copper toxicity data across species and from fish raised in hatcheries to fish in the wild.

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