| Title | Fish ladder installation across a historical barrier asymmetrically increased conspecific introgressive hybridization between wild winter and summer run steelhead salmon in the Siletz River, Oregon |
| Publication Type | Journal Article |
| Year of Publication | 2018 |
| Authors | Hemstrong, William, Stan van de Wetering, and Michael A. Banks |
| Secondary Title | Canadian Journal of Fisheries and Aquatic Sciences |
| Volume | 75 |
| Number | 9 |
| Pagination | p.1383-1392 |
| Date Published | 2018, Sep. |
| Call Number | OSU Libraries: Electronic Subscription |
| Keywords | Siletz River, Siletz Falls, Steelhead trout = Oncorhynchus mykiss, depleted populations, genetics, hatchery salmonids, hatcheries, wild salmonids |
| Notes | For eons, a waterfall on the Siletz River effectively separated the summer and winter steelhead runs, allowing each group of steelhead trout to evolve for maximum fitness in different environmental conditions. Then, in the early 1950s a fish ladder was constructed, which allowed for the two groups to hybridize. The ladder was maintained until 1994. The resulting progeny would be more genetically diverse, but might not be the most fit to succeed in their environment. This article examines the extent of hybridization in the summer and winter steelhead runs on the Siletz, as well as their interactions with hatchery populations. “These trends suggest that the risks of outbreeding and inbreeding depression need to be carefully balanced to successfully manage this and other similar populations” (p.1384). |
| DOI | 10.1139/cjfas-2016-0411 |
| Series Title | Canadian Journal of Fisheries and Aquatic Sciences |
