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whereas only one fish of this species had been captured before. • It appears from the results in the Paonia study area that during the 1976-77 sampling period the river xas not especially poor in fish fauna considering the total number of fish species identified, but it xas poor in terms of the standing crop biomass that xas produced. Eight species xere found in the study area compared to 5 species (and at least one more that I am aware of) found in the Crystal River in 1972 (Thorne, 1973). The study area was notable in not having any rainbow trout, nor any other trout species except one single brown trout. Although the extreme dewatering (particularly in the loxer t::o stations) and warmer temperatures during summer and eazly fall create a significant stress on trout, it is surprising that there • xere no other trout caught. Stocking of fish both upstream and doxn- stream of the general Paonia vicinity has occured in recent years and trout have been caught in this area within the past 10 years. Table 6- 9 shows stocking and fisherman catch records for the years 1971-76. Unfortunately, no breakdown was available by sections of the river so it is not known just where in the river plants were made. In general plants of catchable rainbow declined from a high of almost 40,000 fish in 1971 to about 1600 in 1974 and'75. The reason for this is not known, but _t may be related to low flpxs and high summer temperatures. In 1976 some 16,500 fingerlings xere scattered along the river, but no catchables xere plante3. No fingerlings were caught in the study azea. Data on Tables 6~ and -6 give an indication of the standing crop biomass of fish in the study area. It can be concluded that the biomass of • fish per acre is low, but the particular figures obtained cannot be con- sidered as aecise values. It xas obvious that all fish xere not cautured 6-5