How do you count the grizzly bears in Yellowstone National Park? The grizzly bear likes to scratch his back on the rough bark of the pine tree. Rangers wrap trees with braided wire to snag the hair of the bear as he indulges his wish to scratch. The hair is then used for a DNA analysis which (bears) the special signature of the individual. No duplication in the count is possible and one therefore obtains an accurate census. And so, high tech science meets a rather pedestrian need of the naturalist.
No comments:
Post a Comment