|
<br />532
<br />
<br />The Southwestern Naturalist
<br />
<br />vol. 53, no, 4
<br />
<br />as red shiner (~vt}rinella lutrensis that are not
<br />considered traditional piscivores, also have been
<br />implicated in decline of native fishes in the
<br />Colorado River Basin (Ruppert et a!., 1993;
<br />Bestgen et a!., 2(06). The Iowa darter might be
<br />particularly problematic if populations expand
<br />in backwaters of the Green River because they
<br />may compete for food resources or prey upon
<br />larvae of the endangered Colorado pikeminnow
<br />Plychocheilus luGius or razorback sucker Xymuchen
<br />texanus. It seems likely that introduction of the
<br />Iowa darter to the Yampa River was from a bait-
<br />bucket release, in spite of state regulations
<br />prohibiting use of live bait there since 1986.
<br />More stringent regulations and deteo-ents may
<br />be needed to prevent further illicit introductions
<br />of nonnative fishes and subsequent negative
<br />effects on native and endangered fishes in the
<br />Colorado River Basin.
<br />
<br />This study was funded by the Recovery Implementa-
<br />tion Program for Endangered Fish Species in the
<br />Upper Colorado River Basin, The Recovery Program is
<br />a joint effort of the United States Fish and Wildlife
<br />Service, United States Bureau of Reclamation, Western
<br />Area Power Administration, states of Colorado, Utah,
<br />and Wyoming, Upper Basin water users, emironmental
<br />organizations, Colorado River Energy Distributors
<br />Association, and the National Park Service. Funding
<br />for this research was administered by the United States
<br />Bureau of Reclamation under cooperative agreements
<br />with Colorado State University and the Larval Fish
<br />Laboratory. Administration was facilitated by T. Chart,
<br />D, Spea~, V. Romero, M. Olivas, J. Frantz, A. Nielsen,
<br />and C. Morales. Field assistance was provided by R.
<br />Compton, G, DeKleva, G. Fox, M, Gruszczynski, A. Hill,
<br />C. McNerney, M. Sullivan, T. Sorensen, R. Streater, K
<br />Terry, C, Wilcox, G. B. l'Iaines, and others who have
<br />escaped memory but also deserve thanks, Identification
<br />of specimens was provided by D. E. Snyder and S. Seal.
<br />Collecting permits were provided by the state of
<br />Colorado and the United States Fish and Wildlife
<br />Service. Reviews byJ. Hawkins, A. Hill, and anonymous
<br />reviewers are appreciated. This is contribution 151 of
<br />the Larval Fish Laboratory.
<br />
<br />LITERATURE CITED
<br />
<br />AVER, N. A. (editor). 1982, Identification oflanml fishes
<br />of the Great Lakes Basin with emphasis on the Lake
<br />Michigan Drainage. Great Lakes Fishery Commis-
<br />sion, Ann Arbor, Michigan, Special Publication 82-
<br />3:1-744.
<br />BAXTER, G. T., AND J. R. SIMON, 1970. Wyoming fishes.
<br />Wyoming Game and Fish Department Bulletin 4:
<br />1-168.
<br />
<br />BECKE;R, G. C. 1983. Fishes of Wisconsin. University of
<br />Wisconsin Press, Madison.
<br />BECKMAN, W. C. 1974. A guide to the fishes of Colorado.
<br />University of Colorado, Boulder, Museum Leaflet
<br />11:1-110.
<br />BESTGEN, K R. 1989, Distribution and notes on the
<br />biology of Phoxinus eos (Cyprinidae) in Colorado.
<br />Southwestern Naturalist 34:225-23l.
<br />BESTGEN, K R., D. W. BElliR.~, G. B, HAINES, ,"'-''1D]. A. RICE.
<br />2006. Factors affecting recruitment of young Color-
<br />ado pikeminnow: s}~lthesis of predation experi-
<br />ments, field studies, and individual-based modeling.
<br />Transactions of the American Fisheries Society 135:
<br />1722-1742.
<br />CARLSON, C. A., Ac'lD R. T. Mum. 1989. The Colorado
<br />River: lifeline of the American Southwest. Canadian
<br />Special Publication of Fisheries and Aquatic Scienc-
<br />es 106:220-239.
<br />ELLIS, M, M. 1914, Fishes of Colorado. University of
<br />Colorado, Boulder.
<br />HENDRlCI(S, L.]. 1950. TIle fishes of Boulder County,
<br />Colorado. M.S. thesis, University of Colorado,
<br />Boulder.
<br />HOLDEN, P. B., Ac'lD C. B. STALNAKER, 1975. Distribution
<br />of fishes in the Dolores and Yampa river systems of
<br />the upper Colorado River Basin. Southwestern
<br />Naturalist 19:403-412.
<br />JAFFA, B. B. 1917. Notes on the breeding and incubation
<br />periods of the Iowa darter, Etheostorna iOlVae Jordan
<br />and Meek. Copeia 1917:71-72.
<br />JOHNSON, J. H., AND D. S. DROPKIN, 1992. Predation on
<br />recently released larval American shad in the
<br />Susquehanna River Basin. North American Joumal
<br />of FisheIies Management 12:504-,508.
<br />LEE, D. S., AND C. R. GILBERT. 1978. Etheos{.orna exile
<br />(Girard), Iowa darter. Page 646 in Atlas of North
<br />American freshwater fishes (D. S. Lee, C, R. Gilbert,
<br />C, H. Hocutt, R. E.Jenkins, D. E. McAllister, and].
<br />R. Stauffer, Jr., editors). North Carolina State
<br />Museum of Natural History, Raleigh.
<br />LI, H, W. 1968. Fishes of the South Platte River Basin.
<br />M.S. thesis, Colorado State University, Fort Collins.
<br />OLDEN, J. D., N, 1. POFF, AND K R. BESTGEN. 2006. Life-
<br />history strategies predict fish invasions and extirpa-
<br />tions in the Colorado River Basin. Ecological
<br />Monographs 76:25-40.
<br />PROPST, D. 1. 1982. Warmwater fishes of the Platte River
<br />System. Colorado; distribution, ecology, and com-
<br />munity d}~lamics. Ph.D. dissertation, Colorado
<br />State University, Fort Collins.
<br />PROPST, D. 1., AND C. A. CARLSON. 1986. The distribution
<br />and status of warmvvater fishes in the Platte River
<br />drainage, Colorado. Southwestem NaUlralist 31:
<br />149-167,
<br />RUPPERT, J. B" R T. Mum, A'lD T. P. NESLER, 1993.
<br />Predation on fish larvae by adult red shiner, Yampa
<br />and Green rivers, Colorado. Southwestern Natural-
<br />ist 38:397-399.
<br />
|