Michigan State is trying to reintroduce Grayling back into a few streams. Perhaps Alberta can learn from Michigan's attempts at reintroduction. Here's a link with some information and initiatives https://www.migrayling.org/
Below is from the web page
The Department of Natural Resources, in partnership with the Little River Band of Ottawa Indians, announced a proposed initiative in June 2016 that aims to bring back an extirpated species to the state – Arctic grayling. The Michigan Arctic Grayling Initiative seeks to establish self-sustaining populations of this species throughout its historical range in Michigan. The initiative has more than 45 partners collaborating on the reintroduction.
The next steps include identifying interest and abilities of partners, collecting baseline data, initiating the building of broodstock and stocking efforts. The Manistee River watershed, once known as a premier grayling river, will be the first location for reintroduction.
The DNR will work closely with partners as the proposed Michigan Arctic Grayling Initiative moves forward. The Little River Band, located in Manistee County, has been engaged in extensive research for potential grayling reintroduction for several years.