Anadromous Steelhead and resident Rainbow Trout interactions

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Detailed Description

This video captures both the resident and anadromous forms of (Oncorhyncus mykiss) Rainbow Trout in a small tributary in the upper Cowlitz River Basin, Washington during spawning season. The male Rainbow Trout exhibits a courting behavior as it quivers against the side of the larger female (HOR) hatchery origin steelhead. The female steelhead carries our implanted radio transmitter which can be seen as the white antenna exiting from her mouth.


Date Taken:

Length: 00:05:40

Location Taken: Crystal Cr., Cowlitz River basin, WA, US


In 2017, USGS researchers from the Columbia River Research Laboratory implanted radio tags into 72 adult winter steelhead and monitored their behavior and movements in the upper Cowlitz River Basin, Washington.
Both hatchery origin (HOR) and natural origin (NOR) steelhead were monitored in this study.  This video documents interactions of a radio-tagged HOR female steelhead and a NOR Rainbow Trout on the spawning grounds.