The trend appears unmistakable: A smaller percentage of people in Minnesota, the United States and elsewhere are participating in outdoor recreation such as hunting, fishing, camping and visiting parks.
The reason: People -- especially kids -- may be spending more leisure time with computers, televisions and other electronics.
"We are seeing a fundamental shift away from people's interest in nature," researchers Oliver Pergams and Patricia Zardica wrote in a study published last week in the Proceedings of the National Academy of Sciences.
It was funded by the Nature Conservancy, a national conservation group.
Their study looked at camping, backpacking, fishing, hiking, hunting and visits to national and state parks and forests. Besides the United States, it also included data from Japan and Spain.
They found that beginning in the 1980s, there was a striking decline in per-capita nature recreation, with a total drop of 18 to 25 percent from 1981 to 1991.
That finding supports other recent figures by the U.S. Fish and Wildlife Service and the Minnesota Department of Natural Resources showing declines in the percentage of the population that hunts, fishes, camps and partakes in other outdoor activities.
In Minnesota, while actual numbers of hunters, anglers, campers and park visitors have remained mostly steady, their numbers as a percentage of the population have fallen. From 1996 to 2006, per capita angling was down 16 percent, hunting was down 9 percent and park visitation was down 10 percent.