In this week’s Science Friday post, John McMillan is back with a breakdown of a recent study looking at how steelhead, chinook, and coho are re-establshing their populations and diversity, on a pair of Elwha River tributaries between the former dam sites.
Science Friday: What’s up with these kelts?
Another Science Friday looking at the fate and migratory oceanic patterns of steelhead kelts from Alaska’s Situk River.
Science Friday (PART TWO): Disappearing Steelhead – The Fate of Summer Steelhead Seeking Coldwater in the Columbia and Snake Rivers
fish traveling downstream through the hydro system, and discussion of possible management changes to help improve steelhead survival.
Science Friday (PART ONE): Disappearing Steelhead – The Fate of Summer Steelhead Seeking Coldwater in the Columbia and Snake Rivers
In the Columbia and Snake rivers hydropower systems, many migrating summer steelhead overshoot their spawning streams, passing dams multiple times and increasing mortality rates, trying to find cold water refuge. We look at the ramifications on steelhead management for not properly accounting for these overshoot steelhead.
Science Friday: It’s not all about steelhead
We look at a new paper that digs into the factors leading harbor seal to prey on juvenile steelhead and the abundance of both coho and Chinook salmon during the steelhead outmigration window to understand how these pulses of hatchery salmon impact the weekly survival of steelhead moving through Puget Sound.
Science Friday: The shifting baseline of Olympic Peninsula steelhead
Much of the original evolutionary fabric of wild steelhead populations in the Pacific Northwest has been lost to history. But how much, exactly? A new report examining Olympic Peninsula steelhead sheds some light on that.
Science Friday: How dam construction — and removal — changed genetics of O. mykiss in the Elwha River
Have you ever wondered how installing a dam, and later removing it, can influence the genetics of a population of migratory fishes? A new study sheds some light on a possible answer.
Science Friday: Oldie but a goodie on steelhead fry behavior in intermittent streams
This week we review a Master’s Thesis from John David Faudskar, conducted when Faudskar was at Oregon State University in 1980. This study examined how young steelhead behaved during their first summer of life in the Rogue River watershed in Oregon.
Science Friday: Update on the Hood Canal bridge and survival of steelhead smolts
This week’s Science Friday is an update on a topic we have covered before: the effect of the Hood Canal bridge on survival of steelhead smolts passing through Hood Canal.
Science Friday: Juvenile steelhead finding refuge in tributary mouths
Summer is over, but before we put it behind us, it’s worth considering that the summer of 2020 was likely one of the two hottest summers in the northern hemisphere since humans began measuring the temperature of air and water. Hot temperatures directly—and sometimes dramatically—affect steelhead and many other salmonid species. So our Science Friday review this week of a study of steelhead in California’s Eel River is timely.