alt Hacker NewsThe temperature is cooler? That can't possibly be the only reason to explain such a dramatic change in survival rates. We definitely need more research on this topic.
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margalabargala • yesterday at 8:53 PM
If you do even a moment of reading about salmon, you will find that they are extremely sensitive to warm temperatures. Even a couple degrees F above their "normal" will allow disease to run rampant.
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There's more food, less energy wasted fighting excessively strong current, and more places to hide from predators. Water quality goes up downstream of a beaver(-ish) dam.