Releasing YY-male brook trout in Arizona

Matt Rustin (left) and Zac Jackson (right) releasing YY-male brook trout in Thompson Creek, Arizona, in support of the long-term Apache trout recovery project to eradicate brook trout from Apache trout recovery habitat. Over time, YY-male (male brook trout with two Y chromosomes) will eradicate nonnative Brook Trout because the population eventually becomes all male, leading to the extirpation of the target population while leaving Apache trout unharmed. Photo courtesy of Joshua Duplechian with Trout Unlimited.