Not true.  While some groups of Alaska native people are responsible, many groups and individuals have a long history of wasting resources and wiping out fish and game populations.  Very little preservation was practiced, the only reason some populations of animals survived was because the people lacked the technology to kill more of the wildlife.  You see this every year when the wildlife managers try to preserve fish populations and the native groups want to go out and catch every fish they can, not recognizing that they are not leaving enough to spawn for future generations.  The groups were nomadic, moving to a new area when populations were wiped out.  I support their subsistence lifestyle, but they have to recognize that when populations are down, they can't harvest as much or else there won't be any left for the next year.