Gila trout are one of the rarest trout species in the United States, making them a focus of Trout Unlimited’s restoration work on native, southwestern trout. They are only found in Arizona and New Mexico, earning them a spot on the federal Endangered Species List in 1967.
But they were re-classified as threatened in 2006 thanks to successful conservation work. Today, Gila trout conservation is guided by the Gila Trout Recovery Plan and the Gila Trout Recovery Team led by professionals from the New Mexico Department of Game and Fish, U.S. Forest Service, U.S. Fish and Wildlife Service (USFWS), the University of New Mexico, and the Arizona Game and Fish Department (AZGFD).
Gila trout fry are earning a successful recovery
Recovery efforts started in earnest after a wildfire ripped through Mt. Graham near Safford, Ariz., in 2017, scorching 50,000 acres and the well-established Gila trout fishery on Ash and Frye creeks. Recovery teams salvaged what remained of the Gila trout populations just before monsoon season hit and toxic ash flowed down both creeks. Since then, agencies and organizations have partnered to create a plan to reintroduce the Gila trout to its native streams.
By early April 2019, Frye Creek recovered enough to receive its first supplemental stocking of 20,000 fertilized Gila trout eggs. The process required building a red on the outside of a plunge pool and injecting the eggs a few inches below the gravel’s surface. Just days later, the trout hatched, securing refuge in the slower current of the pool. This is a new technique for Gila trout, originating in New Mexico and exhibiting an 8- to 10-percent success rate from egg to fry. Grapevine Creek in Arizona also successfully received this same treatment, displaying similar results.
Injecting fertilized eggs on a redd
Gila trout eggs on a redd
Another effort to reach the Gila Trout Recovery Plan conservation goal happened in November 2019. Trout Unlimited, AZGFD, and USFWS crews backpacked 250 Gila trout fry into the headwaters of Frye Creek, roughly 3 miles above the Frye Mesa Reservoir. This helped expand their range and ensured the cold waters in the headwaters could help them endure threats from climate change.
