Less than 10 years ago, the Deacon Rockfish (Sebastes diaconus) was distinguished as a separate species from the Blue Rockfish (Sebastes mystinus). Given that little is known about this recently described species, we investigated the population structure of fish sampled off the Oregon coast. We found that genetic differentiation was small and suggesting there is a single stock of Deacon Rockfish. You can read more about it here (PDF).
Adult steelhead (Oncorhynchus mykiss) return from the ocean to spawn in two phases: a summer run and a winter run. In the Rogue River, juveniles also briefly return to freshwater as “half-pounders.” We used genetic tools to demonstrate that Rogue half-pounders contribute to both summer and winter runs as adults.
Klamath Basin Genetic Studies
We are gathering baseline genetic data on Oncorhynchus mykiss(e.g. Steelhead, Rainbow Trout, and Redband Trout) in the Klamath Basin prior to the largest dam removal project in global history. This baseline will be used to monitor native Redband Trout populations and their interactions with recolonizing Steelhead post-dam removal.
Rogue River Chinook Salmon Studies
Chinook salmon (Oncorhynchus tshawytscha) return to freshwater in the spring and fall, providing important recreational and subsistence fisheries on their way upstream. We use genetic markers to distinguish between spring and fall run Chinook salmon and document where these two seasonal run types spawn in the Rogue River.
O’Malley KG, Van Dyke D, Samarin PA, Bohn S, Clements S (2020) An evaluation of “early” and “late” run alleles in Rogue River Chinook salmon (Oncorhynchus tshawytscha) Information Report 2020-06 Oregon Department of Fish and Wildlife, Salem. 24 pp. (PDF)