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Science Friday: The fate of stranded post-spawn adult steelhead

In Science Friday by Nick Chambers

By John McMillan   One significant way in which steelhead differ from salmon is that O. mykiss have the ability to survive spawning and try to make the journey again. This behavior is referred to as repeat spawning.   Repeat spawner rates are highly variable among populations of steelhead, with rates being higher in coastal streams than among inland populations …

Science Friday: Why are half pounders declining in the Trinity River?

In Science Friday by Nick Chambers

When anglers dream of steelhead, they mostly fantasize about fish that have spent 2-4 years in the ocean and return to freshwater to spawn as full adults, packing four or more pounds and brutish power into their physique. However, one of the most common forms of returning steelhead in some rivers is not the adult, but the so-called half-pounder.   …