This second translocation will augment the number of humpback chub remaining in Shinumo Creek following the 2009 translocation; and in the future, possibly provide an opportunity for rearing humpback chub in a natural environment outside of the Little Colorado River.
300 Humpback Chub Translocated into Shinumo Creek
- 6 minutes, 8 seconds
On June 23, 2010, 300 juvenile humpback chub were translocated to Shinumo Creek as part of a multi-year conservation experiment to establish a second spawning aggregation of this endangered fish in Grand Canyon National Park.
Prior to the translocation, a 13-person crew led by GRCA fisheries biologist Brian Healy spent six days surveying the translocation reaches of Shinumo Creek to get population estimates of humpback chub and other native fish (bluehead suckers and speckled dace), and removing nonnative rainbow trout. A number of humpback chub from the 2009 translocation were captured during monitoring, and population estimates are pending. A crew returned to Shinumo Creek in September for additional monitoring.
A new aspect of this project in Shinumo Creek for 2010 is estimating populations of bluehead suckers and speckled dace by marking individual fish with fin clips or PIT tags, which are small microchips that uniquely identify each fish, that are emplaced in the abdomen of the fish that were caught during surveying.
Bluehead suckers have declined in portions of their range, and aspects of this project, such as nonnative trout removal, may benefit the species over the long-term.
Healy said, "Monitoring populations of native and nonnative fish in Shinumo Creek over time will allow us to assess the effects of our experimental native fish restoration efforts, and adapt them to achieve success."
The National Park Service is directing the Shinumo Creek humpback chub translocation experiment, in conjunction with the Bureau of Reclamation, the U.S. Fish and Wildlife Service, and the Arizona Game and Fish Department.
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2009 Humpback Chub Translocation
Arizona Game & Fish website
Last updated: February 2, 2018