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conductance, and color. <br />5. Determine selected chemical parameters at each collecting site: total dissolved solids, <br />dissolved Na and K, total hardness, sulfates, alkalinity, chlorides, dissolved oxygen, total <br />dissolved nitrogen, total soluble phosphorus, and soluble reactive phosphorus (i.e., <br />orthophosphate). <br />6. Develop multivariate index functions for fish, macroinvertebrates, and environmental <br />parameters using canonical correspondence analysis (ter Braak 1986, 1987). From this, a <br />macroinvertebrate and fish-based Index of Biotic Integrity will be developed. The <br />validity of using the Thienemann net technique alone as well as the collections of <br />Ephemeroptera, Plecoptera, and Trichoptera will be assessed for New Mexico waters. <br />7. Prepare an illustrated atlas of chironomid pupal exuviae similar to the format used in <br />Langton (1984). Prepare a checklist of taxa and dichotomous keys to the Plecoptera, <br />Ephemeroptera, and Trichoptera. <br />8. Prepare performance report. <br />RESULTS AND DISCUSSION <br />Over the past seven years, sampling has been conducted at 154 aquatic sites representing the <br />major river basins in New Mexico, including the San Juan, Zuni, San Francisco, Gila, Mimbres, <br />Rio Grande, Tularosa, Salt, Pecos, and Canadian/Arkansas basins. Results and discussions of <br />analyses of the data from these collections are presented in numeric order by job objective. <br />Objectives 1 and 2. <br />Benthic macroinvertebrates have been identified from 136 sample sites. These represent <br />collections from the Canadian (including Dry Cimarron), RioGrande, Gila (including San <br />Francisco), and San Juan (including Zuni) drainages. The 18 samples that remain to be identified <br />are from Gulf Coast drainages. Larval Chironomidae, Trichoptera, Ephemeroptera, Plecoptera <br />and other taxa from the 18 aforementioned samples have yet to be enumerated and identified, <br />respectively. All of the remaining in-hand Thienemann (15), UV-night light (17), and sweep-net <br />macrobenthos samples have been sorted. Some 3727 midge exuvial slides, 1023 midge adult <br />slides, 828 midge larva slides, and 76 midge pharate-adult slides have been prepared and <br />delivered to Dr. Sublette for identification. New record sheets for samples examined during this <br />segment of the project together with the corrected sheets are given in Appendix 4. <br />In addition, the manuscript Mayfly fauna of New Mexico by W. P. McCafferty, C. Lugo-Ortiz, <br />and G. Z. Jacobi was published in the Great Basin Naturalist. Most of the mayfly location <br />records cited after 1991 are acknowledged to the IBI project and support from the Federal Aid <br />Grant F-59-R <br />I