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<br />256
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<br />Th~ So"lhw~..lern Naturalis/
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<br />
<br />vol. 30, no. 2
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<br />
<br />May 1985
<br />
<br />Rlalk and Rulkley-Crowth Rate 01 Squaw",h
<br />
<br />2:17
<br />
<br />~
<br />Even 105 km downstream below the confluence of the Green and [he
<br />warmer unimpounded Vampa River, mean monthly summer water
<br />temperature in 1964 was only 16.90 C (Bulkley and Pimentel, 1983). Based
<br />on growth oE yearling Colorado squawEish in the laboratory, growth .11 l.So
<br />C would be only 18% and at 200 Conly 54% oE the rate achievabk iE
<br />/t'lIlperature were maintained at 250 C. Hence, new water devrlopmenl and
<br />storage projects in the upper Colorado River drainage should be dl'signnl
<br />10 provide summer water temperature as near 250 C as possible if
<br />preservation of the habitat for yearling Colorado squawhsh IS a
<br />(onsideration.
<br />
<br />We thank Richard Pimerlld (or care of laboratory [ish and assislallH' in conslrunioll of h'",
<br />l hambers. Funds for this project were provided by U.S. Fish and Wildlife Servin' COIl"a" 11-
<br />16-0008-1061-A2. The project was administered by the lItah Cooperative Fishl'lY ReSl',u<il l'nit,
<br />which is jointly sponsored by the Utah Division of \Vildlife Resources, Utah State llni\'lT"il\".
<br />"lid U.S. Fish and Wildlife Service.
<br />
<br />LITERATURE CITED
<br />
<br />IlnINK>, R. J. AND D. E. BENSON. 1980. Endangered and lhrl'atened fish e.' of the "l'l'e,
<br />Colorado Rivet basin. Coop. Ext. Serv., Cohnado Stair Univ., Fort Collin'), CO
<br />Bulletin 503A.
<br />(h.tTINGER, 1: L. AND j. J. l\tAGNUSON. 1979. Growth rates and lempnaLUre sdcnioll o[
<br />bluegill. Lepomis macrochirus. Trans. Am. Fish. Sac 108:378-382.
<br />BU':TTE, R. M. AND G. H. GEEN'. 1980. Growth of underyearling so('ktye salmon (On('or!i\'1l( Illls
<br />nerka) under constant cyclic temperatures in relation 10 live zooplankton ralion
<br />size. Can. J. Fish. Aqua!. Sci. 37:203-210.
<br />HU:TT, .f. R. 1971. Satiation time, appetite, and maximum food int<lkr of so('kr)'r salmon
<br />(Oncorhynchus nerka). J. Fish. Res. Board Can. 28:409-415.
<br />- AND J- E. SHELBOllRN. 1975. Growth rate of young ..,oc-keYf salmon (OncorhYllchus
<br />nerka) in relation to fish size and ration level. J. Fish. Res. Board Can. 32:2103-2110.
<br />11l"l.KLEV, R. v., C. R. BERRY, R. PIMENTEL AND T. BI.ACK. 1981. Tolerann's and prdnl'IHI"
<br />of Colorado River endangered fishes to selened habitat param('te[s. Utah enop. Fi')h.
<br />Res. Unit, Utah State Univ.. Logan, Utah.
<br />AND R. PIMENTEL. 1983. Temperature preference and avoidance by adult razorback
<br />suckers. Trans. Am. Fish Soc. 112:601-607.
<br />Cl)t.'TANT. C. C. 1980. Envir-onmental quality for striped bass. In Marine recreational fi"lwri~'s.
<br />G. H. Clepper, ed. Sport Fi,hing Instilllle, Washington, D.C.
<br />Cox, D. K. AND C. C. COUTANT. 1981. Growth dynamics of juvenile .>lriped bass as l"lll,ioll'
<br />of temperature and ration. Trans. Am. Fish. Sac. 110:226-238.
<br />lllRUNG, J. 1981. Temperature tolerance and the hnal preferendum-rapid methods for Ihe
<br />assessment of optimum growth temperatures. J. Fish. BioI. 19:439-4.';:).
<br />I HtKE, A. E. 1977. Optimum temperature for growth of juvenile bluegill,. Prog. Fi,h.Cult.
<br />39:55-.')7.
<br />\kCORMICK, J. H, AND C. F KLEINER. 1976. Growth and survival 01 youllg-o[-the-year emerald
<br />shiners (NO/TOP is atherinoides) at different temperatull's. ]. Fish. Res. Roard Can.
<br />33:839-842.
<br />\hGNUSON, J. J., 1.. B. CROWDER AND P. 0, MEDRICK. 1979. -It-mperatull' as all e(()lll~il:d
<br />resource. Am. Zoo!. 19:331-343.
<br />\ """:K, C. D. AND R. H. KRAMER. 1969. Life history of the Colorado squawli,h,
<br />P/ychocheilus lucius. and the Colorado chub, Gila robusta, in the Greell Rin'l at
<br />Dinosaur National Monument, 1964-1966. Trans. Am. Fish. So... 98:193-208.
<br />R. H. KRAMER AND D. R. FRANKLIN. 1970. Distribution of (~rt'en River fishes in t'lah
<br />and Colorado following closure of Flaming Gorge Dam. Southwest. Nat. 14:297-315.
<br />
<br />,Idd,('ss of authors: National Fisheries Cen ler , Box 700, Kearney.wille, 11'1' 25130. a7/d L'tail
<br />, ''''',erative Fishery Research U7/il. Utah State U7/iv.-UMC 52. [.ogan, UT 84322.
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