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Last modified
7/14/2009 5:02:35 PM
Creation date
5/22/2009 4:53:39 PM
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UCREFRP
UCREFRP Catalog Number
9378
Author
Nesler, T. P.
Title
Recovery of the Colorado River Endangered Fishes
USFW Year
2000.
USFW - Doc Type
Biological recovery goals and criteria for Colorado pikeminnow, Humpback chub, Razorback sucker & Bonytail.
Copyright Material
NO
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<br />--~~-~~~---~----~-- <br /> <br />Required <br />Populations <br />distribution <br /> <br />Green <br />River <br />Including: <br />Yampa <br />L. Snake <br />White <br />Price <br />Duchesne <br /> <br />Colorado <br />River <br />Including: <br />Gunnison <br />Dolores <br /> <br />San Juan <br />River <br /> <br />Abundance Annual natural recruitment per Adult population length frequency <br />Abundance trend river, *5-yr rolling average distribution, 5-yr rolling average <br /> <br />. 3,100 adult fish <br />minimum <br />. ~350 mm <br />. Lower estimate of <br />95% C.r. for each <br />annual estimate <br />~1550 <br /> <br />. 1,600 adult fish <br />minimum <br />. ~350 mm <br />. Lower estimate of <br />95% C.r. for each <br />annual estimate <br />>800 <br /> <br />. 1,200 adult fish <br />minimum <br />. ~350 mm <br />. Lower estimate of <br />95% C.r. for each <br />annual estimate <br />~600 <br /> <br />Regression slope of <br />7 estimates spanning <br />12 years ~O at <br />p~0.1 0 for Green, <br />Yampa, White, <br />Colorado, and San <br />Juan rivers <br /> <br />And <br /> <br />Regression slope not <br />a progressive decline <br />over 7 estimates <br />spanning 12 years <br /> <br />Size cateaorv (mm) <br /> <br />Green R: *5-15% @ 351-400 mm Green R <br />4/12 yrs 2:15% <br /> <br />~350: <br />351-600: <br />2:601 <br />~500: <br />501-700: <br />2: 701: <br />~450: <br />451-650: <br />>651 <br /> <br />20-30% <br />65-75% <br />5-15% <br />5-15% <br />75-85% <br />5-15% <br />5-15% <br />65-75% <br />10-20% <br /> <br />Yampa R.: *5-10% @ 401-500 mm Yampa R. <br />4/12 yrs 2:10% <br /> <br />White R: *5-10% @ 351-450 mm White R <br />4/12 yrs 2:10% <br /> <br />Colorado R.: "'5-15% @ 351-450 mm Colorado R <br />4/12 yrs 2:15% <br /> <br />Size cateaorv (mm) <br />~350: 5-15% <br />351-600: 65-75% <br />2:601 25-35% <br /> <br />San Juan R:"'5-10% @ 351-450 mm San Juan R <br />4/12 yrs 2:10% <br /> <br />Size cateaorv (mm) <br />~450: 5-15% <br />451-650: 65-75% <br />2:651 10-20% <br /> <br />23 <br />
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