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9 <br />direct-readout velocity meter was used to record water column <br />velocities. Conductivity, salinity, and temperature were recorded <br />using a Yellow Springs Instrument Co. (YSI) model 33 SCP meter. <br />All biological and physicochemical data were recorded on CATCH, <br />RARE, and PHYSICAL data sheets during field collections and <br />transferred to magnetic tapes for storage and future analysis. See <br />Wick et al. (1985) for details on data sheets, storage, or <br />retrieval. <br />Endangered fish captures 1979-1984 <br />Tagging of endangered fishes by CROW began in 1979 in <br />coordination with the U.S. Fish and Wildlife Service (USFWS). <br />Small [6 x 16 millimeter (mm)] plastic Carlin dangler tags were <br />attached by polyethylene line just below the posterior margin of <br />the dorsal fin. Printed information on each color-coded tag <br />included the USEWS address in Salt Lake City and a unique <br />identification number. Tag color codes and abbreviations were <br />established for each of the various rivers as follows: <br />red(R) - Colorado River, <br />green(G)- Green River, <br />blue(B)- Gunnison River, <br />white(W)- White River, <br />yellow(Y)- Yampa River, <br />orange(0)- fish implanted with radiotransmitter, and <br />reddish-orange(0)- Yampa and Colorado rivers, 1979. <br />A tag was tied on fish collected from each river, but <br />unfortunately the above convention was not always followed due to <br />occasional shortages of appropriate colored tags. In addition, a' <br />few fish were retagged with a different tag when there was <br />inflamation around the old tag or when the old tag was in danger of <br />coming loose. The current procedure is to reuse the original tag