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<br /> <br />50272 -101 <br />'REPORT DOCUMENTATION <br />PAGE <br /> <br /> <br />2. <br /> <br />.. Title and Subtitle <br />Habitat suitability index models and instream flow suitability <br />curves: White sucker <br /> <br />7. Author(s) <br />Kathleen A. Twomey, Kathryn L. <br /> <br />Williamson, and Patrick C. Nelson <br /> <br />Western Energy and Land Use Team <br />U.S. Fish and Wildlife Service <br />Drake Creekside Building One <br />2627 Redwing Road <br />Fort Collins, CO 80526-2899 <br /> <br />9. Performing Organization Name and Address <br /> <br />wyoming Cooperative Fishery <br />Research Unit and <br />University of Wyoming <br />Laramie, WY 80271 <br /> <br />12. Sponsoring Organization Name and Address <br /> <br />Western Energy and Land-Use Team <br />Division of Biological Services <br />Research and Development <br />Fish and Wildlife Service <br />u.S. De artment of the Interior <br />Washington, DC 20240 <br /> <br />15. Supplementary Notes <br /> <br />.It. Abstract (Limit: 200 words) <br /> <br />3. Recipient's Accession No. <br /> <br />5. Report Date <br />September 1984 <br /> <br />t. <br /> <br />8. Performing Organization Rept. No. <br /> <br />10. Project/Task/Work Unit No. <br /> <br />11. Contract(C) or Grant(G) No. <br /> <br />(C) <br /> <br />(G) <br /> <br />13. Type of Report & Period Covered <br /> <br />14. <br /> <br />The habitat suitability index (HSI models presented in this publication aid in <br />identifying important habitat variables for the white sucker (Catostomus commersoni), <br />a freshwater species found in lacustrine and riverine environments. Information <br />obtained from the research literature and expert reviews are synthesized into models <br />which present hypotheses of species/habitat relationships. <br /> <br />A brief discussion of suitability index (SI) curves as used in the Instream Flow <br />Incremental Methodology (IFIM), and a discussion of SI curves available for the IFIM <br />analysis of white sucker habitat are also included. <br /> <br />17. Document Analysis a. Descriptors <br /> <br />Fishes <br />Habitability <br />Mathematical models <br />Aquatic biology <br /> <br />b. Identlfiers/Open.Ended Terms <br />White sucker <br />Catostomus commersoni <br />Habitat suitability <br />Instream Flow Incremental Methodology <br /> <br />c. COSATI FIeld/Group <br />IL Availability Statement <br /> <br />21. No. of Pages <br /> <br />Release unlimited <br /> <br />19. Security Class (This Report) <br />Unclassified <br />20. Secvrity Class ('thj$. PalJe) <br />unClaSS1Tlea <br /> <br />22. Price <br /> <br />(See ANSI-Z39.18l See Instructions on Reverse <br /> <br /><(( U.s. GOVERNMENT PRINTING OFFICE: 1987-n6-721165.252 REGION NO. 8 <br /> <br />56 <br /> <br />OPTIONAL FORM 272 (4-771 <br />(Formerly NTI5-35) <br />Department of Commerce <br />