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<br />• C. S. Thaeler, Jr; R. J. Raitt, Jr.; J. W. Atma}•; and J. A. Ludwig .for supervis-
<br />~~.. ~...
<br />ing the research ana stvrewmg drafts of the manuscript. Drs. D. M. Armstrong
<br />and J. S. Findley have also contributed materially to the expression of this work;
<br />their suggestions have beery most valuable. R. K. Delson provided statistical con-
<br />sultation, and D. J. LaBar expressed patience and encouragement throughout..
<br />Funding for this project has been generously supplied by the Dept. Biol. and
<br />the Comp. Cent., New Mexico State Univ., and by the Dept. Game and Fish,
<br />Santa Fe. This work was submitted in partial fulfillment of the requirements of
<br />the M.S, degree in Biology at N.M.S.U.
<br />LITERATURE CITED
<br />BAILEY, V. 1931. Mammals of New Mexico. N. Am. Fauna 53:1-412.
<br />BROWN, J. H. 1971. Mammals on mountaintops: non-equilibrium insular bio-
<br />geography. atm. Nat. 105:467}78.
<br />ERICSOIV, D. B., M. SWING, end G. WOLLIN. 1964. The Pleistocene epoch
<br />in deep-sea sediments. Science 146:723-732.
<br />FINDLEY, J. S. 1969. Biogeography of Southwestern boreal and desert mam-
<br />mals. Pp. 113-128, in Contributions in Mammalogy (J. K. Jones, Jr•., ed.), Misc.
<br />Publ., Univ. Kans. Mus. Nat. Hist. 51:1-428.
<br />FINDLEY, J. S., A. H. HARRIS, D. E. WILSON, and C. JONES. 1975. Mam-
<br />mals of New Mexico. Univ. New Mexico Press, Albuquerque, 360 pp.
<br />GROSS, F. A. 1976. Primeval vegetation types of New Mexico (1880). Unpub.
<br />Wrap, Ne~v Mexico State [lniv., Las Cruces.
<br />LANCE, G. N., and Vl'. T. WILLIAMS. 1967. A general theory of classifica-
<br />torv sorting stralegie~. 1. Hierurchic+d systems. Comput. J. 9:373-380.
<br />AIacARTNUR, R. Il., and I?. U. WILSON. 1967. 1'hc thror}• of island bio-
<br />geography. Princeton University Press, Princeton, 203 pp.
<br />141ETCALF, A. L. 1977. Some Quaternary molluscan faunas from the northern
<br />Chihuahuan Desert and their paleoecological implications. Pp. 53-66, in Trans-
<br />actions of the Symposium on the Biological Resow-ces of the Chihuahuan Desert
<br />(R. H. Wauer and D. H. Riskind, eds.), Proc. Trans. Ser., Nat. Park Serv. 3:1-658.
<br />PLA'TNICK, N. L, and G. NELSON. 1978. A method of analysis for historical
<br />biogeography. Syst. 'Cool. 27:1-16.
<br />SMILLIE, K. W. 1969. STATPACK2: an APL statistical package. Publ., Dept.
<br />Computer Sci., Univ. Alberta, Edmonton 17:1-67.
<br />SNEA'TH, P. H. A., and R. R. SOKAL. 1973. Numerical taxonomy. W. H.
<br />hrecnran and Co., San Francisco, 573 pp.
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<br />
<br />THE SOUTHWESTERN NATURALIST 2rj (1) :4,1-rj0 .TAN. 30, 1980 ~ "~
<br />-- --
<br />DISTRIBUTION OF FISHES ' IN THE
<br />SAN RAFAEL RIVER SYSTEM- OF` THE
<br />UPPER COLORADO RIVER BASIN
<br />~, ~ ~-
<br />CHARLES W. MCADAt, CHARLES R. BERRY, JRy AND ,~
<br />CHARLES E. PHILLIPSZ -~
<br />..
<br />Utah Cooperative Fishery Research Unit, Utah State University, Logan, UT 84322 ''"
<br />ABSTRACT. The San Rafael River and lower reaches df four major tributaries,
<br />Cottonwood, Huntington, Perron, and Rock Canyon creeks, were sampled for fish
<br />acrd water quality in March-April, June, and October, 1977. Native species of
<br />Gsh included speckled dace (Rhinichihys osculus), ilannelmouth suckers (Cato-
<br />stomus latipinnis), bldehead suckers (C. discobolus), and roundtail chubs (Gila
<br />robusta). Red shiners (Notropis lutrensis), fathead minnows (Pimephales prom-
<br />elas), black bullheads .(Ictalurus melas), and channel catfish (I. punctatus) were
<br />recorded introduced species. A single young-of-the-year Colorado squawfish
<br />(Ptychocheilus Lucius) was caught in the lower Sen Rafael River in October.
<br />This is the first documented record of Colorado squawfish in the San Rafael River.
<br />Native fish were dominant at seven stations in the tributary streams and middle
<br />section of the San Rafael River and introduced fish dominated the fauna near
<br />the mouth of the river.
<br />The future extraction of coal in the Upper Colorado ,River Basin
<br />has aroused concern about impacts of this development on native
<br />fish and wildlife. The fish fauna of the basin constitutes one of the
<br />least understood groups of fishes native to a major North American
<br />river (Holden and Stalnaker 1975). The San Rafael River Basin is
<br />a major sub-basin in the system, and large coal deposits occur within
<br />its boundaries. Before the present survey, only the cold, headwater
<br />streams of the San Rafael River on the Wasatch Plateau (Manti-La
<br />Sal National Forest) had been adequately surveyed (unpublished
<br />data, Utah Division of Wildlife Resources)..The fish of the lower
<br />river, where it flows through the arid Colorado Plateau, are relatively
<br />unknown. The objective of this -study was to gather information on
<br />the species composition, distribution, and relative abundance of
<br />tPresent address: U.S. Fish and Wildlife Service, ] 311 Federal:. $uilding, Salt
<br />Lake City, UT 84138.
<br />a Present address: Washington Department of Game;: Burlington, WA 98231.
<br />41
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