Science Friday! Another chance to dive into the weeds and define some of the jargon used when discussing, studying and evaluating hatchery steelhead. This week we focus on acronyms commonly used in hatchery management plans. Anyone who has read through a Hatchery Scientific Review Group plan or review, or most any resource management plan for that matter, has probably …
Steelhead 101: Defining types of steelhead hatcheries
Every steelhead angler is probably somewhat familiar with hatcheries. As we discussed last week, deciphering the jargon associated with hatcheries is important, but can also be difficult. This week’s terminology is more common-place, and many of you may be familiar with it already. But, just in case, let’s look at the terms used to broadly classify hatchery programs: segregated and …
Steelhead 101: Using snorkel surveys to estimate adult steelhead escapement
Another week, another post on how scientists and fisheries managers measure steelhead escapement. Last week, we described redd counts and why they are an important tool. This week, we review snorkel surveys. Snorkel surveys entail divers swimming in the river and visually counting adult steelhead. Like redd counts, snorkel surveys do not cover an entire river, but rather break …
How many steelhead can you fit into a school?
It depends on how old and big they are. Over the past year we have talked extensively about the value of life history diversity in steelhead, and in particular, that a broader range in spawn timing – which results in a broader range of emergence for juveniles – can help ameliorate density-related impacts by spreading steelhead of various ages …
What happened to our Columbia River steelhead?
By now, you have probably heard steelhead returns to the Columbia are well below the most recent ten-year average. As a result, places like the Methow River will not be open to steelhead angling this fall. In short, that is a bummer. There has been much speculation about the causes for the decline and potential fear that changes …
Juvenile steelhead doing what it takes to become a smolt: You grow in summer, I’ll grow in winter
Another Friday, another blog post on the science of steelhead. We love this day of the week! Our topic this week is the growth of juvenile steelhead. Did you know that the growth rate of steelhead can vary depending on the season of the year? This variation in growth rate can be considerable. There are a number of reasons that …
Steelhead biology for anglers
One thing you will notice about anglers who have spent a lot of time on the water, and I mean a potentially unhealthy amount of time on the water, is they catch fish. This can be frustrating to new anglers who are just learning to steelhead fish and spend many fishless days casting. There is no substitute for time …
Rivers of Resilience – Asotin Creek
Asotin Creek is a tributary that drains into the Snake River near the town of Asotin in eastern Washington. With a drainage area of 250 square miles, Asotin Creek is slightly larger than the Wind River, but also much smaller than the Yakima River watershed. Like the Yakima, the basin is located in a semi-arid environment. Most of the watershed …
Rivers of Resilience – Wind
The Wind River, a tributary to the Columbia River just above Bonneville Dam, is, at only 224 square miles, a substantially smaller drainage than the Yakima. It receives more precipitation and thus is dominated by forests and industrial timberlands. The Wind River has had some habitat restoration but nowhere near the extent of the Yakima, but that is also because …
Rivers of Resilience – Yakima
It can be hard to maintain faith in the steelhead world. As noted in the recent article by Bill Herzog, it seems like we are losing wild summer runs faster than we can recover them. I would hedge that many, if not most, anglers feel the same. Steelhead are not disappearing for lack of effort though. Frankly, it’s amazing …
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