MINNEAPOLIS (WCCO) — Scientists are trying to figure out why the moose population in Minnesota has gone down as much as 65 percent.

The answers aren’t good news.

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The Minnesota DNR captured 49 moose calves and fitted them with GPS transmitter collars. Days after finishing their work, 22 of the newborn moose had already died.

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The DNR said most were killed by bears and wolves.

A University of Minnesota Duluth researcher said the moose population can thrive with only 40 percent of calves surviving.

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But moose calf survival has dropped below 30 percent in recent years.