Laserfiche WebLink
<br />be solved as concurrent control methods are implemented that are <br />dependent on the target nonnative fish species. <br /> <br />SUMMARY AND CONCLUSION <br /> <br />Seventeen (]7) "problematic" nonnative fish species would likely benefit, <br />directly or indirectly, from enhancement or restoration of floodplain <br />habitats. Twenty-five other nonnative fishes do not pose a high threat of <br />predation or competition with the endangered fishes. Although various options <br />have been identified for resolving the problem, we believe that application of <br />an adaptive management approach should be used through carefully designed <br />field experiments that will evaluate methods to aid in the survival of <br />razorback sucker during the early life stages and, at the same time, partially <br />control nonnative fishes that may prey upon or compete with the razorback <br />sucker. The razorback sucker is a long-lived species with a rather high <br />fecundity that probably exhibited strong year classes when environmental <br />conditions were suitable. Recovery of this species may be possible if <br />successful recruitment can be achieved in lout of 10 years. <br /> <br />REFERENCES <br /> <br />Bates, B., T. Chart, and M. Moretti. 1993. Colorado squawfish Interagency <br />Standardized Monitorin9 Pro9ram, 1986-90: 10wer Green and Co1orado rivers. <br />Utah Division of Wildlife Resources, Publication 93-]]. <br /> <br />Bayley, P.B. ]gg]. The flood pulse advantage and the restoration of river- <br />floodplain systems. Regulated Rivers: Research and Management 6: 75-86. <br /> <br />Beyers, D.W., R.T. Muth, and M.S. Farmer. ]993. Competitive interactions between <br />larvae of Colorado squawfish and fathead minnow. Unpublished manuscript. <br />Larval Fish Laboratory, Colorado State University, Fort Collins. 36 pp. <br /> <br />Burdick, B.D. ]995, Ichthyofaunal survey of the Gunnison River, 1992-1993. <br />Colorado River Fishery Project, U.S. Department of the Interior, Fish and <br />Wildlife Service, Grand Junction, Colorado. (Draft) <br /> <br />Cranney, J.S. ]990, Interagency Standardized Monitoring Program, ]986-89: upper <br />Green River and lower White River, Utah. Draft Report. Utah Oivision of <br />Wildlife Resources, Vernal. <br /> <br />Crowl, T. ]994. Personal communication. Department of Fishery and Wildlife <br />Science, Utah State University, Logan. <br /> <br />Dunsmoor, L. ]993. Laboratory studies of fathead minnow predation on catostomid <br />larvae. Natural Resources Department, The Klamath Tribes, Chiloquin, <br />Oregon. Research Report KT-93-0]. ]6 pp. <br /> <br />Grabowski, S.J. and S.D. Hiebert. ]989. Some aspects of tropic interactionsin <br />selected backwaters and the main channel of the Green River, Utah: ]987- <br />1988. U.S, Bureau of Reclamation, Research and Laboratory Services <br />Division, Environmental Sciences Section, Denver, Colorado. 130 pp. + an <br />appendix of 155 pp. <br /> <br />6 <br />