Category Archive: Science Friday

Science Friday: How do steelhead survive in intermittent streams?

It’s the first Friday in October — officially, “Septober” for us steelheaders.   Unfortunately, steelhead runs across much of the West Coast have been down this year, and now there is another blob of warm water in the North Pacific. Things don’t look good right now, but wild steelhead have withstood these types of conditions … Continued

The Choice for Hatchery Residual Steelhead

Do you know that not all hatchery steelhead smolts actually migrate to the ocean? Some remain in freshwater. Either way, these O. mykiss face a future that could be heroic (survive long enough to mate with a wild steelhead adult female) — or not-so-heroic (survive the summer in freshwater but perish during the difficult conditions … Continued

A Genetic Basis for Summer and Winter Steelhead – a follow up

By Charlie Schneider   We’re going to bring things full circle this week, with a look at how emerging science can meld with policy and restoration efforts to help reach our ultimate goal of improving steelhead runs.   A previous SF post (http://www.wildsteelheaders.org/much-at-stake-in-listing-decision-on-northern-california-summer-steelhead/ ) highlighted the petition to list summer steelhead on the Eel River … Continued

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