This idea of needing to "study" moose and other big game by chasing them with planes or choppers and tranquilizing them is a bunch of bs.
The feds and MN DNR did that a couple years ago in NE MN. Tranquilized, put in a big net and flew them back to their "base" of operations, did their tests, then flew them back to where they got them. They had several adult moose die, because they were so stressed. Who knows how many calves the cow lost for the same reason.
They were "studying" why moose population has remained pretty constant of the past decades. Simple their are packs of big predators that roam the same woods as the moose, deer, etc., that eat them!

"The most uncommon thing you'll find these days is common sense."