Not that I know of as most cow hunting was restricted to archery season, some muzzleloader, and limited controlled rifle hunting.
To hunt a bull elk, one simply had to just go buy an over the counter tag. This study was to see the differences in bull mortality in areas that had high access with most roads open, areas with closed roads, and areas with poor vehicle access.
In my mind this study really drove home the point that lots of open roads and unlimited bull tags usually means bulls don't live long.
