Effects of Multiple Nonnative Fish on an Imperiled Cyprinid, Hornyhead Chub

2019 ◽  
Vol 148 (6) ◽  
pp. 1132-1145 ◽  
Author(s):  
Brian T. Hickerson ◽  
Bryan M. Maitland ◽  
Annika W. Walters
Keyword(s):  
Nonnative Fish

Propagated Fish in Resource Management

2004 ◽  
Keyword(s):  
Colorado River ◽  
Pimephales Promelas ◽  
Initial Study ◽  
Lepomis Cyanellus ◽  
Green River ◽  
Endangered Fish ◽  
Black Bullhead ◽  
Nonnative Fish ◽  
Floodplain Reconnection ◽  
Ictalurus Melas

<em>Abstract.</em>—Floodplains are presumed to be important rearing habitat for the endangered razorback sucker <em>Xyrauchen texanus</em>. In an effort to recover this endemic Colorado River basin species, the Upper Colorado River Endangered Fish Recovery Program developed a floodplain acquisition and enhancement program. A levee removal study was initiated in 1996 as one component of this floodplain restoration program. The goal of the Levee Removal Study was to evaluate the system responses to levee removal and make specific recommendations concerning the value of floodplain reconnection for endangered species (specifically razorback sucker) recovery. However, because there were very few razorback suckers in the Green River, answers to several important questions pertaining to razorback sucker utilization of the floodplain were not answered during this initial study. In an effort to answer some of these questions, age-1 and larval razorback suckers were stocked into depression floodplain wetland habitats along the Middle Green River in northeastern Utah. Age-1 razorback suckers were stocked during the spring of 1999 and 2000 into The Stirrup (river kilometer [Rkm] 444.0), Baeser Bend (Rkm 439.3), and Brennan (Rkm 432.0) wetland sites. Larval razorback suckers were stocked during the spring of 1999 into The Strirrup and into Baeser Bend during 2001. At the time of stocking, each floodplain site was occupied by numerous nonnative fish, including black bullhead catfish <em>Ictalurus melas</em>, fathead minnow <em>Pimephales promelas</em>, green sunfish <em>Lepomis cyanellus</em>, and common carp <em>Cyprinus carpio</em>. The goal of this study was to test if floodplain depressions will aid in the recovery of razorback suckers.

scholarly journals Two Ocean Pass: An Alternative Hypothesis for the Invasion of Yellowstone Lake by Lake Trout, and Implications for Future Invasions

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1629 ◽  
Author(s):  
Todd M. Koel ◽  
Colleen R. Detjens ◽  
Alexander V. Zale
Keyword(s):  
Brook Trout ◽  
National Park ◽  
Lake Trout ◽  
Cutthroat Trout ◽  
Snake River ◽  
Yellowstone Lake ◽  
Yellowstone River ◽  
Continental Divide ◽  
Nonnative Fish ◽  
Yellowstone Cutthroat Trout

Preventing the interbasin transfer of aquatic invasive species is a high priority for natural resource managers. Such transfers can be made by humans or can occur by dispersal through connected waterways. A natural surface water connection between the Atlantic and Pacific drainages in North America exists at Two Ocean Pass south of Yellowstone National Park. Yellowstone cutthroat trout Oncorhynchus clarkii bouvieri used this route to cross the Continental Divide and colonize the Yellowstone River from ancestral sources in the Snake River following glacial recession 14,000 bp. Nonnative lake trout Salvelinus namaycush were stocked into lakes in the Snake River headwaters in 1890 and quickly dispersed downstream. Lake trout were discovered in Yellowstone Lake in 1994 and were assumed to have been illegally introduced. Recently, lake trout have demonstrated their ability to move widely through river systems and invade headwater lakes in Glacier National Park. Our objective was to determine if lake trout and other nonnative fish were present in the connected waters near Two Ocean Pass and could thereby colonize the Yellowstone River basin in the past or future. We used environmental DNA (eDNA), electrofishing, and angling to survey for lake trout and other fishes. Yellowstone cutthroat trout were detected at nearly all sites on both sides of the Continental Divide. Lake trout and invasive brook trout S. fontinalis were detected in Pacific Creek near its confluence with the Snake River. We conclude that invasive movements by lake trout from the Snake River over Two Ocean Pass may have resulted in their colonization of Yellowstone Lake. Moreover, Yellowstone Lake may be vulnerable to additional invasions because several other nonnative fish inhabit the upper Snake River. In the future, eDNA collected across smaller spatial intervals in Pacific Creek during flow conditions more conducive to lake trout movement may provide further insight into the extent of non-native fish invasions in this stream.

Responses of Ambystoma gracile to the Removal of Introduced Nonnative Fish from a Mountain Lake

2004 ◽  
Vol 38 (4) ◽  
pp. 578-585 ◽  
Author(s):  
Robert L. Hoffman ◽  
Gary L. Larson ◽  
Barbara Samora
Keyword(s):  
Mountain Lake ◽  
Nonnative Fish

Spread of nonnative fish mirrors human commerce

Science News ◽  
2009 ◽  
Vol 173 (6) ◽  
pp. 85-85
Author(s):  
Patrick Barry
Keyword(s):  
Nonnative Fish

Factors associated with the success of native and nonnative species in an unfragmented arid-land riverscape

2014 ◽  
Vol 71 (8) ◽  
pp. 1134-1145 ◽  
Author(s):  
James E. Whitney ◽  
Keith B. Gido ◽  
David L. Propst
Keyword(s):  
New Mexico ◽  
Native Fish ◽  
Nonnative Species ◽  
Pylodictis Olivaris ◽  
Biotic Factors ◽  
Gila River ◽  
Factors Associated ◽  
Common Carp Cyprinus Carpio ◽  
Nonnative Fish ◽  
Native Fishes

Native fish persistence is threatened by the establishment and spread of nonnatives. Identifying environmental and biotic factors associated with the success of co-occurring native fishes and nonnative taxa is central to identifying mechanisms responsible for native declines and nonnative expansion. We related physicochemical variables, food resources, and community composition to the success (secondary production) of native and nonnative fishes, tadpoles, and crayfish across six sites in three reaches (tributary, canyon, and valley) during 2008–2011 in the Gila River, New Mexico. Native fish success was greater than nonnative success across a range of physicochemical conditions, basal resource supply rates, and nonnative communities, although nonnative fish, tadpole, and crayfish success could approach or exceed that of native fishes in canyon habitats, a warm-water tributary, or in downstream valley sites, respectively. Native fish success was lowest in canyon reaches, when flathead catfish (Pylodictis olivaris) and common carp (Cyprinus carpio) were highly productive. These results demonstrate the potential for native fish persistence in the presence of nonnatives in physically unmodified streams, highlighting the importance of habitat preservation for native conservation.

Historical Changes in Large River Fish Assemblages of the Americas

2005 ◽  
Keyword(s):  
New Mexico ◽  
Native Species ◽  
Colorado River ◽  
Fish Assemblages ◽  
Large River ◽  
Main Stem ◽  
Past Century ◽  
The West ◽  
Gila River ◽  
Nonnative Fish

<em>Abstract.</em>—The Gila River originates in southwestern New Mexico and courses its way for over 700 km to the west before emptying into the main-stem Colorado River near Yuma, Arizona. Historically, this river was a major watercourse across the Sonora Desert of Arizona. At present, main-stem dams and numerous diversions have markedly altered the historic hydrology of the river. Seventeen native species once occupied the main stem of this large southwest desert river. More than twice that number (40) of nonnative fish species have been introduced into the waters of the Gila over the past century. Currently, less than half of the native fauna is present in the main stem and then primarily in the upper three reaches of the river. The majority of the species (70%) are federally listed as threatened, endangered, or sensitive. The combination of hydrological alteration and accompanying introductions of nonnative, principally sport fishes has basically extirpated the native fauna in all but the uppermost reaches of the Gila River main stem.

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