This is a great overview of a new study published this month, showing that boom and bust cycles in wild salmon stocks have been going on for centuries, long before commercial fishing (and salmon farming).

Alaska salmon's Blog

We’re talking about salmon. What were you thinking?

Some neat sciency stuff was published yesterday. That is, researchers at the University of Washington have discovered that salmon stocks have been highly variable for centuries – long before the start of commercial fishing.  And these variations are not just year to year, but can stretch out for decades. Heck, one particular cycle was found to last 200 years!

But how can we know the abundance of salmon without written record, you ask? Read on, we reply.

Yesterday’s U of W release stated that the researchers examined sediment cores collected

from 20 sockeye salmon nursery lakes in southwestern Alaska. The scientists focused in on something that salmon accumulate in the ocean and leave behind in lake sediments when they die: nitrogen. When there was a lot of this specific nitrogen in the sediments, it meant returning runs during that time period were abundant; when there was little, runs had declined.

Interestingly, most…

View original post 133 more words

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3 thoughts on “”

  1. Thanks for posting. The report will be available for free probably later in the year. Just keep doing google searches.

    On a side note…..Kudos to Bob, James and Grant for taking on the anti-fish farming activists regarding the the recent Chilliwack newspaper article on the “boycott”. Thanks for taking on this misinformation head-on.

  2. There is one problem.

    Ordinary readers have to pay a fee to read the original article and understand just what the significance is.

    Pity

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