Category Archive: Science Friday

eDNA and O. mykiss, part II

Natalie Stauffer-Olsen   Two weeks ago we looked at the use of eDNA in monitoring for the presence or absence of aquatic species. While our post was not a comprehensive review of this subject, we did include some of the most promising aspects — and some of the challenges — associated with using this new … Continued

Science Friday: The value of new technology: eDNA and O. mykiss

By Natalie Stauffer-Olsen   It is always exciting when new technology becomes available that can help us understand, manage and protect wild steelhead, the mavericks of the Pacific salmonids.   Steelhead and rainbow trout populations can be difficult to predict, model and understand because of their very plastic (scientific term for highly variable) life histories, … Continued

Science Friday: What happens when you cram the big’uns in with the small’ins?

We sure do love this beautiful weather! It’s almost the first day of June. Summer is officially within sight.   This week’s Science Friday goes back in time over 20-years to 1997.  We review a study conducted by Brett Harvey and Rodney Nakamoto. We have reviewed some of their work previously, which focused on habitat … Continued

Science Friday: Successful habitat restoration on the Washougal River

Welcome to another Science Friday post from Wild Steelheaders United. In this space we usually review scientific studies that have implications for wild steelhead conservation and management. But we take a slightly different path this week. I was born and raised on the banks of the Washougal River in SW Washington. The poor Washougal has … Continued

Science Friday: Why is your lateral line different than mine?

Most of us working on behalf of wild steelhead love our jobs. Still, after a long week we are ready to hit the water — and share some more Science Friday steelhead knowledge.   This week we touch on a study conducted by Andrew Brown at the University of Washington, along with several co-authors. The … Continued

Science Friday: When fish grow and die in California

Soquel Creek is a small stream flowing into Monterey Bay about 70 miles south of San Francisco and is home to a population of winter steelhead. A group of scientists published a paper in 2009 that looked into seasonal patterns of growth, survival and movement of age-0 and age-1+ juvenile steelhead within this small California … Continued

Science Friday: Predictions for Columbia/Snake River summer steelhead and a new study on ocean distribution

Winter steelhead season is winding down, if not over in some rivers. Time to regroup and prepare for summer runs!   This Friday we have a science two-pack for you.   First, a bit of cautious optimism. More steelhead are predicted to return to the Columbia River basin this year than in the past two … Continued

Science Friday: Can innovative methods for a wild broodstock hatchery rebuild a depleted wild population

This week we send you off with a review of a recent before-and-after study on hatchery steelhead published by Barry Berejikian and Donald Van Doornick (find the study here).  The goal of this long-term study, conducted in a handful of rivers in Hood Canal, Washington, was to determine if a well-designed hatchery program could help … Continued

The Maury Povich Steelhead Show: You are all the father

Took a short break from our Science Friday posts to do some actual science (on Olympic Peninsula winter steelhead) and to weigh in on some important policy issues. But now, like anglers looking for fresh winter chrome: we’re b-a-a-a-c-k.   As you know, in the Science Friday forum we discuss a wide range of topics … Continued

Can a Wild Coho Salmon Population Recover Following Closure of a Hatchery Program

Today’s post is the conclusion of our two part guest series on the recovery of Coho in Oregon’s Salmon River. (Click here for last weeks post) Lately we have shared several studies on Pink and Coho salmon, which provide important lessons for salmonid recovery efforts across a range of species and watersheds. Perhaps the most … Continued