Lake trout ‘a canary in a coal mine’ for climate change: researcher

Aug. 15, CBC News:

A new study out of the University of Manitoba shows some lake predators are changing their behaviour due to climate change, which may have a wide-ranging effect on aquatic ecosystems.

Researchers watched the feeding habits of lake trout at the IISD Experimental Lakes Area in northwestern Ontario over an 11-year span and found the fish can quickly adapt their behaviour — moving to deeper and cooler parts of the lake to feed — as water temperatures rise.

Matthew Guzzo, a PhD candidate in the U of M’s department of biological sciences and lead author of the study published in the proceedings of National Academy of Sciences, said as temperatures rise, lake trout move from shallow, more productive waters to the deep part of the lake where water is cooler but food is of a lower quality. Read more.

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