Facts Summary: The Humpback Chub (Gila cypha) is a species of concern belonging in the species group "fishes" and found in the following area(s): Arizona, Colorado, Utah, Wyoming. Officials are also noticing more of the chub appearing downstream from the Little Colorado River. It has existed in the Colorado River for approximately 3-5 million years. Before 2007, surveyors would only catch 1 to 3 humpback chubs below Diamond Creek. The humpback chub is named for the fleshy hump behind its head, an adaptation to the turbulent waters it typically inhabits, Chart said. The humpback chub likes rocky waterways with swift currents, but it also needs warm and muddy water to spawn. Description. It has a very distinctive hump on its head that is believed to act as a means to prevent predation by making the fish harder to swallow. Humpback Chub Facts: One of the 6 remaining native fish in the Colorado River in Grand Canyon; it is endemic to this region. The humpback chub has been making a comeback with its population now stabilized at around 12,000 fish. Today, you can catch hundreds of chubs in the area. By | 2011-02-02T00:00:00-05:00 February 2nd, 2011 | Just the Facts Radio | Comments Off on Humpback Chub swims back strong. Humpback Chubs are freshwater fish that have inhabited the Grand Canyon and Colorado River for millions of years. The humpback chub, Gila cypha, is a large chub, between 12 and 15 in (30-38 cm) in length, with a prominent dorsal hump behind the head.It has a flat, fleshy snout, and small eyes. Related story: Feds say tiny snail in Utah, Arizona can no longer be listed as endangered. It is olive or brown on the back and silvery on the sides and belly. Once populous throughout the Colorado River and Grand Canyon, a fish known as the humpback chub began declining in numbers throughout the 1990’s. The U.S. FWS's Threatened & Endangered Species System track information about listed species in the United States The humpback chub is huge for a minnow, sometimes attaining 20 inches in length. The humpback chub, a fish native to the Colorado River and considered endangered since 1967, has turned a corner. The Humpback Chub, or Gila cypha, is a minnow that was once abundant throughout the entire Colorado River Basin and parts of Wyoming and Arizona.
In a recent analysis, scientists at the U.S. Scientists think that its population decline was likely caused by changes in the river due to the construction of the Glen Canyon Dam, as well as the introduction of nonnative fish like rainbow trout. The fish can live up to 30 years and grows, on average, to 15 inches in length. Humpback Chub is a large freshwater fish that only lives in the Colorado River basin. Adaptations to swift, silty flow include compressed skull, small eyes, a lateral line that senses vibrations of insect prey, large fins, forked tail, narrow caudal peduncle and a dorsal hump that acts as a stabilizer.
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