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Last modified
7/14/2009 5:02:30 PM
Creation date
5/17/2009 11:11:23 PM
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UCREFRP
UCREFRP Catalog Number
7332
Author
Valdez, R. A., et al.
Title
Final Report Habitat Suitability Index Curves for Endangered Fishes of the Upper Colorado River Basin.
USFW Year
1987.
USFW - Doc Type
\
Copyright Material
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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />FWS (Table A-I), as well as records from the.working database (Table A-2) are <br />presented in Appendix A. <br /> <br />Results <br /> <br />The database was defined as all of the available data collected in the <br />UCRB that either qualitatively or quantitatively describe the habitat used by <br />the Colorado squawfish, humpback chub, and razorback sucker. The data <br />assimilated by BIO/WEST spanned a period of 23 years, from 1964 through 1986, <br />and included the collections of 17 principal investigators. Many of the <br />reports and publications resulting from these investigations have been <br />summarized in an annotated bibliography by Wydoski et al. (1980), and in an <br />evaluation of the status, life history, and habi tat requi rements of the <br />endangered fishes by Joseph et al. (1977). <br /> <br />The data provided for this project included collections by FWS, BOR, CDOW, <br />UIMR, utah state University, Colorado State University, and various private <br />groups. Other small datasets were secured by BIO/WEST at the direction of FWS. <br />This included data from recent collections that had not yet been received by <br />FWS. The only datasets that could not be entered into the database were the <br />collections of Wick and Stoneburner (1984, studies with radiotagged Colorado <br />squawfish in the Yampa River) and those of Haynes (1982-1985, larval and YOY <br />collections in the lower Yampa River). The former data were not available, and <br />reformatting the dual-file data of the latter set into a compatible format was <br />beyond the scope of this project. <br /> <br />Data provided by FWS for 1979-1981 and the data in CWCjDATABASE were <br />stored in one of three basic formats: CATCH, RARE, and RADIO. The CATCH type <br />format generally contained data on all species of fish captured, including the <br />rare fish; RARE type format contained data on only the individual juvenile and <br />adult rare fish; and RADIO type format contained radiotelemetry data on adult <br />rare fishes. The majority of data received were in RARE or RADIO type format, <br />and the habitat data used on this project were from one of these two formats. <br />However, since rare fishes less than 60 rom total length (TL) were not stored in <br />the RARE or RADIO type formats, habitat information for these small sizes was <br />taken from the CATCH type format. Also, the CATCH type format was more useful <br />in providing a complete documentation of each study (i.e., dates, times, sample <br />locations). <br /> <br />An initial examination of the data received from FWS revealed that only <br />the variables of depth, velocity, and substrate were consistently recorded for <br />most of the database. The variable temperature was not available for most <br />collections, and cover was rarely recorded. <br /> <br />S'IUDY NARRATIVES <br /> <br />Methods <br /> <br />All data assimilated under Objective 1 were associated with study <br />descriptions provided by FWS and retrieved through a literature search. The <br />number of target fishes reported for each study was retrieved as a dataset. <br /> <br />4 <br />
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