Yellowstone cutthroat trout hybridization

Rainbow trout (Oncorhynchus mykiss) have been widely introduced across the world, and in some locations hybridize with native trout. LIz Mandeville along with Annika Walters, Katie Wagner (University of Wyoming) and Jason Burckhardt (Wyoming Game and Fish) are conducting a study of hybridization between native Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri) and rainbow trout in the North Fork Shoshone River drainage near Cody, Wyoming.

Juvenile trout were sampled from 26 tributaries of the North Fork in fall 2016 creating a large genomic dataset. The goals with this work are to

  1. Identify extent of hybridization between Yellowstone cutthroat and rainbow trout in the North Fork Shoshone River
  2. Characterize variation in hybridization among tributaries
  3. Identify potential mechanisms that maintain reproductive isolation

Results of this work will inform conservation of native trout, and will also provide an important perspective on how consistent evolutionary processes that maintain reproductive isolation are across replicate instances of secondary contact between closely related species.shoshone trout stream

Contact

Liz Mandeville , Postdoc
Wyoming Cooperative Fish & Wildlife Research Unit
Dept. 3166, 1000 E. University Avenue
Laramie, WY 82070

emandevi@uwyo.edu

 

Annika Walters, Assistant Unit Leader
Fisheries / Assistant Professor
Wyoming Cooperative Fish & Wildlife Research Unit
Dept. 3166, 1000 E. University Avenue
Laramie, WY 82070
annika.walters@uwyo.edu
office: (307) 766 5473

Funding & Partners

Wyoming Game and Fish Department

U.S. Forest Service

Wyoming INBRE

University of Wyoming