Ever wonder what happens to all the fish when reservoirs fluctuate up and down? Ethan Bell, Senior Fisheries Ecologist, will present results of fish stranding surveys along Trail Bridge Reservoir (McKenzie River, Oregon) at the 141st annual meeting of the American Fisheries Society taking place this week in Seattle, Washington. With early morning transect counts along the shores of this run-of-the-river, power-peaking reservoir, we found that small depressions, low gradient, and areas with cobble and gravel substrate had the highest incidence of fish stranding. Fish species commonly found in this reservoir include: spring Chinook salmon, bull trout, coastal cutthroat trout, rainbow trout, brook trout, mountain whitefish, and sculpin.
The study, funded by Eugene Water and Electric Board as part of relicensing of the Carmen-Smith Project, provided a scientific basis to develop management goals and criteria for the settlement agreement. Ethan and his co-authors also published these results in the North American Journal of Fisheries Management.
Ethan’s presentation is on Wednesday, September 7 at 11:30am at the Washington State Convention Center, Room 611.
Posted 5 September 2011.