My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
9553
CWCB
>
UCREFRP
>
Copyright
>
9553
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
7/14/2009 5:01:47 PM
Creation date
5/20/2009 1:36:51 PM
Metadata
Fields
Template:
UCREFRP
UCREFRP Catalog Number
9553
Author
Valdez, R. A. and R. T. Muth
Title
Ecology and Conservation of Native Fishes in the Upper Colorado River Basin
USFW Year
2005
USFW - Doc Type
American Fisheries Society Symposium
Copyright Material
YES
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
48
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
Show annotations
View images
View plain text
<br />ECOLOGY AND CONSERVATION OF NATIVE FISHES IN THE UPPER COLORADO RivER BASIN <br /> <br />185 <br /> <br />underway in the San Juan River since 1998 and <br />are showing signs of success. Some species, such as <br />channel catfish, striped bass, walleye, and common <br />carp are being removed by raft-mounted electro- <br />fishing, whereas control of other species, such as <br />red shiner, is being attempted through restoration <br />of natural flow regimes and river habitat. The <br />SJRIP continues to work with the Navajo Nation <br />and the state of New Mexico to translocate chan- <br />nel catfish from the river to area lakes to enhance <br />recreational fishing opportunities. Totals of 12,660 <br />channel catfish and 10,016 common carp were <br />removed during 1995-1997 (Brooks et al. 2000; <br />Ryden 2000), and over 9,000 channel catfish were <br />translocated during 1998-2004. A shift toward <br />smaller channel catfish was noted by 1997 and was <br />attributed to more efficient capture of large fish <br />by electrofishing (Propst and Hobbes 2000). Re- <br />sults indicate that those efforts have successfully <br />reduced river-wide abundance of channel catfish <br />to the lowest level ever observed, changing the size <br />structure of the channel catfish population to one <br />now dominated by juvenile fish, thereby lessening <br />the potential for channel catfish reproduction and <br />predation on large native fish. <br />Another nonnative fish control strategy imple- <br />mented in the San Juan River in 1992 was release <br />of high flows from Navajo Dam to reduce num- <br />bers of red shiner, channel catfish, and other non- <br />native fish species. Nonnative fish species are ill- <br />adapted to flooding characteristics of southwest- <br />ern streams where native species evolved (Meffe <br />and Minckley 1987; Minckley and Meffe 1987). <br />Declines in red shiner, sand shiner, and fathead <br />minnow were reported in the upper basin follow- <br />ing high flows of 1983-1985 (McAda and <br />Kaeding 1989; Osmundson and Kaeding 1989; <br />Valdez 1990; Muth and Nesler 1993; Lentsch et <br />al. 1996; McAda and Ryel 1999). Propst and <br />Hobbes (2000) noted reduced red shiner num- <br />bers in secondary channels of the San Juan River <br />in years when a summer flood event occurred. <br />Monitoring and data management.-Monitor- <br />ing is necessary to evaluate status and trends of en- <br />dangered fishes as well as other native and nonna- <br />tive fish species to assure the SJRIP's overall suc- <br />cess in achieving recovery. A long-term monitor- <br /> <br />ing plan provides for native fish assemblage moni- <br />toring, including larvae, young, and adults; physi- <br />cal-feature monitoring related to key habitat main- <br />tenance; and continued evaluation of flow recom- <br />mendations. The monitoring plan defines baseline <br />monitoring approaches for fish and habitat, espe- <br />cially those related to flow recommendations. The <br />SJRIP has developed an electronic database of all <br />data and reports. <br /> <br />Kendall Warm Springs Dace Biological <br />Management Program <br /> <br />The USFWS and USFS are responsible for manage- <br />ment and conservation of the endangered Kendall <br />Warm Springs dace. The USFWS is responsible for <br />species conservation under the ESA, and the USFS is <br />responsible for integrating management, protection, <br />and conservation of federally listed species into the <br />Forest Planning Process (36 CFR 219.19 and <br />219.20). Management practices are prohibited that <br />may cause detrimental changes in water temperature <br />or composition, water course blockage, or sediment <br />deposits within 30 m of perennial streams, lakes, or <br />other water bodies (36CFR219.27(e)). The Kendall <br />Warm Springs dace recovery plan (U.S. Fish and <br />Wildlife Service 1982b) contains the following re- <br />covery efforts and recovery objectives: <br /> <br />1. Maintain the existing population and <br />habitat by monitoring population levels <br />and maintaining biological and physical in- <br />tegrity of stream habitat; <br />2. Determine the taxonomic status of the <br />Kendall Warm Springs dace; and <br />3. Complete additional research needs. <br /> <br />In the past, Kendall Warm Springs was subject <br />to human activities within the Bridger-Teton National <br />Forest. Cattle grazed and trampled plant life in and <br />around the spring area. Passage was blocked by rock <br />dams built to create small pools for bathing and wash- <br />ing clothes, and soaps and detergents in the water <br />harmed aquatic organisms. A road built across the <br />spring in 1934 includes a 7.5-m section of culverts <br />that may have prevented the Kendall Warm Springs <br />dace from moving upstream and isolated the upper <br />half of the population. The species was used as bait <br />by anglers for many years and "take" was not regu- <br />
The URL can be used to link to this page
Your browser does not support the video tag.