Most steelhead anglers know that the family of fishes called salmonidae (trout, char, salmon and whitefish) are highly sensitive to water temperature and quality. These fishes require cold, clean water to thrive. But what happens to them when water temps become unfavorable? As you might expect, they seek out places in the river that regain cool water — now often …
2017 – a Bad Year or Part of a Trend?
Ocean conditions are vitally important for wild steelhead runs — probably every steelhead angler knows this. But what does that phrase really mean? The ocean is a massive and incredibly complex system, and there are many factors out in the big blue that can influence steelhead in any given year. That is why it is so difficult to parse out …
Science Friday: More on summer and winter steelhead genetics
By John McMillan Two weeks ago we reviewed a study by Prince et al. that discovered a single gene differentiated steelhead which return immature (referred to as pre-mature in the study) to freshwater (i.e., summer steelhead) and those that return in a mature or relatively mature state (i.e., winter steelhead). Anglers have long known there is something inherently different about …
Rise of the Phoenix: wild summer steelhead in the Elwha River
By John McMillan, science director, Trout Unlimited Wild Steelhead Initiative A few years back, while working on the Elwha dam removal project, I donned a wetsuit for one of many snorkel surveys I conducted that summer. I had been snorkeling the main-stem Elwha, but that day – a crisp cool day in mid-October – I found myself drawn to …
Science Friday: How summer steelhead are genetically different than winters
Many anglers over the years have no doubt wondered why some steelhead return to freshwater during the hottest and driest part of the year. The reasons why are both simple and complex. The most obvious difference between summer steelhead and their winter run brethren is that they enter freshwater streams in summer and fall, not winter. Duh. But that …
Science Friday: Warm water’s influence on the speed of upstream migrating steelhead
The dog days of summer are fully upon us. The predicted forecast for adult summer steelhead returning to the Columbia and Snake River basins is now, unfortunately, shaping up to be worse than expected (and it was already very low). However, it can be difficult to determine how accurate this forecast actually is because at this point in time the …
Science Friday: Steelhead in hot water, and what it means for catch-and-release
As predicted for summer steelhead in the Columbia River and many other watersheds in Washington and Oregon, something has happened to the fish. There are precious few of them this season. But it’s important to remember that ebb and flow in population size is part-and-parcel with these fish — and for all salmon in general. We likely pay more …
Science Friday: Turn up the A/C
Summer-time is here. That means hot weather and hot water, two things that don’t mix well with a cold-water fish like steelhead. As we suffer through the largest heat wave of the summer, we wanted to review a piece of research that looked at how adult steelhead alter their behavior and use micro-habitats to cope with warm weather and …
Science Friday: Ephemeral Streams Provide Key Steelhead Habitat
Previously we wrote about the importance of ephemeral streams to steelhead. These are smaller waters, typically in headwaters and tributary drainages, segments of which dry back in summer or that flow intermittently. Today we pick up the topic again because of recent developments on the federal policy front that threaten these important habitat areas. On July 27, …
Science Friday: Hitch-Hiking Smolts
Last week we talked about the importance of spill for out-migrating kelts and smolts in the Columbia Basin. Increasing spill is only one method employed to enhance downstream survival of smolts. As early as the mid-1950s smolts were loaded onto barges and moved downstream past the dams through the lock system. While fisheries managers experimented with this tactic early on …