Integrated population models

Skagit River steelhead

I developed a Bayesian IPM for a population of steelhead from the Skagit River to help biologists from the Skagit River System Cooperative and the Washington Department of Fish & Wildlife examine the effects of hatchery releases and instream flows on steelhead production. You can find a detailed description of the methods here.

Snake River Chinook

Eric Buhle, Jim Thorson, and I have developed an R package to fit a Bayesian IPM to multiple populations of Pacific salmon. Our model also includes broodstock removals for hatchery operations and the effects of hatchery-origin fish spawning in the wild. We are using the model to conduct population viability assessments and evaluate possible effects of various harvest control rules.

Read our latest publication here.