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| | *[http://www.azcentral.com/video/2180647858001 '''Video Link- AZ Central_ National Park Service attempts to undo trout damage at Grand Canyon'''] | | *[http://www.azcentral.com/video/2180647858001 '''Video Link- AZ Central_ National Park Service attempts to undo trout damage at Grand Canyon'''] |
| | *[[Media:130701 USFW LT monitoring of an endangered fish- Dynamics 082012-JFWM-071.PDF |130701_USFWS_ Long-Term Monitoring of an Endangered Desert Fish and Factors Influencing Population Dynamics]] | | *[[Media:130701 USFW LT monitoring of an endangered fish- Dynamics 082012-JFWM-071.PDF |130701_USFWS_ Long-Term Monitoring of an Endangered Desert Fish and Factors Influencing Population Dynamics]] |
| − | * | + | *[http://pubs.usgs.gov/tm/tm2a12/ USGS- '''Standardized Methods for Grand Canyon Fisheries Research 2012'''] |
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GROUP MEMBERS
No Ad-Hoc Group currently assigned
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News
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Quick Facts
Work in progress
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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
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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
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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
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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
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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.
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- NON-NATIVE FISH HISTORY Non-native fish species present in Grand Canyon were mostly established as a result of intentional stocking to develop sport fisheries in the Colorado River and its trivutaries during the late 1800s and early 1900s. Impacts of these actions was not fully understood until later in the 20th Cetury when a shift to native species conservation management occurred in the NPS. Negative impacts of non-native fish and altered habitats on native fish species has been well-documented throughtout the world. Over 20non-native fish species have been documented in GCNP; However, the more common, large-bodied, species of management concern include rainbow and brown trout, common carp, channel catfish, and bullhead species, striped and smallmouth bass. These species are known predators on native fish or native fish eggs or compete with native fish species.(NPS CFMP-EA_Pg 62)
- The fish community throughout Marble Canyon, downstream of the Glen Canyon Reach is GCNP, is dominated by non-native rainbow trout. The fish community changes near the LCR inflow near RM 60 where native species begin to occur. (NPS CFMP-EA_Pg 63)
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INFORMATION
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Reports and Links
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Other Stuff
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LINK: usbr/amp/amwg/mtgs/13feb20/Attach_07b|||
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