Difference between revisions of "FISH"

• AZ Daily News_ Razorback Sucker turns up in Grand Canyon after 20 years
  • The last one recorded had been caught in 1990.
  • Caught October 9th, lower part of Grand Canyon believed to have traveled upstream some 50 miles from Lake Mead.
• Whirling Disease Page

Associated Ad-Hoc Group

TBD

Not completed yet

Quick Facts

• Rainbow Trout are less piscivorous than Brown Trout, but there are more RBT than BRT
• Rainbow and Brown Trout disporpotionately prey on native fish
• Warming increases the growth rates of Humpback Chubs

Work in progress

• • Fish

• What type of fish are found in Lake Powell?
• 1.Endangered

◦ Four types of fish that frequent the Colorado River and Lake Powell are officially endangered because of the construction of dams and introduction of non-native species: the razorback sucker, Colorado pikeminnow, humpback chub and bonytail.

Native

◦ In addition to the above, Lake Powell is naturally home to the bluehead sucker, flannelmouth sucker, roundtail chub and speckled dace.

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Non-Native Bass

◦ The National Park Service introduced three types of bass specifically for fishing purposes: the smallmouth bass, largemouth bass and striped bass.

Other Non-Natives For Fishing

◦ Other non-native species have been introduced into Lake Powell with the intent of challenging fisherman. These include walleye, rainbow trout, channel catfish, bluegill and black crappie.

Problematic Non-Native

◦ Though almost all non-natives are damaging to native ecosystems, the gizzard shad is causing many problems to the native and non-native fish populations because of its large size. The fish has spread throughout the lake and have no natural predators.

• GCDAMP POAHG- Historical Native Fishes of Glen and Grand Canyon
• Bonytail Page

• NPS Comprehensive Fish Management PlanBiological Assessment
• NPS Fish Link
• Video Link- AZ Central_ National Park Service attempts to undo trout damage at Grand Canyon

• NPS Fish Species found in the Grand Canyon
• NPS Grand Canyon Vertebrate Species List
• NPS Grand Canyon Treatened & Endangered Species List
• NPS Endangered Fish Learning