Minnesota's leading moose researchers have one last chance to get it right.
Next month, for the third time, they will try to put tracking collars on about 50 newborn calves in one of the most comprehensive studies ever conducted to find out why moose are in such perilous decline in Minnesota. But the calves' mothers have abandoned those babies at painfully high rates, creating an ethical dilemma for the researchers and the state's elected leaders.
About a fourth of the 75 newborn calves collared so far have been left behind by their mothers, a rate that has confounded the scientists. Now they say that neither they nor the public can tolerate another spring in which human interference results in too many newborn calves that either starve or wind up in zoos after frantic rescue efforts in the woods. Nor do they want their ambitious scientific study to be as cruel as nature itself — or to be seen by the public as making the moose problems worse.
Gov. Mark Dayton agrees. On Friday his office said that, if humans are now the second-leading cause of death for collared calves, the additional risks to them aren't worth the potential scientific gains. He has told the DNR that this spring's calf collaring with be the last. And researchers say that even this next round will be cut short if calf deaths are too high.
"No abandonments is unrealistic," said Glenn DelGiudice, the lead calf study researcher for the Minnesota Department of Natural Resources (DNR). It's a common problem when humans handle some species of wildlife. The question, he said, is how many are "worth what we are learning?"
Because moose, that beloved symbol of the North Woods, are in big trouble. They've disappeared entirely in the northwest corner of Minnesota, and in the northeast corner of the state their numbers have dropped by more than half in the last decade, down to only 3,450. The state has embarked on a $1.7 million, long-term research project of both adult and newborns to try to figure out why, and what might be done to save them.
Why do calves die?
A major piece of the puzzle is understanding why so few calves in Minnesota make it through the first year of life. Using sophisticated GPS tracking collars on adult females and their calves, scientists want to find out how they fare, and what kills 70 percent of the young ones before they make it to their first winter.
In the first year of their study, however, the researchers were stunned when 11 out of 49 newborns died as a result of the collaring itself — nine of them because they were abandoned by their mothers.