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<br />Colorado squawfish will use a fish passageway and determine if fish <br />passage can be used at other sites. a comprehensive monitoring program <br />will be implemented during the first five years. Study direction and <br />objectives of subsequent biological evaluations will depend on results <br />of the preceding 5-year program. <br /> <br />Field Summarv Results to Date (1996-1997) <br /> <br />l.99.Q <br /> <br />Only one adult Colorado squawfish was collected in the fish trap at the <br />upstream end of the fish passageway. This squawfish ascended the fish <br />ladder on 28 August 1996 and was released upstream of the dam. A total <br />of 8.368 fish were counted and fin-clipped in the fish trap from 24 <br />June to 25 October. Five native and 11 nonnative species plus three <br />hybrid sucker fishes were collected in the fish trap. Ninety-four <br />percent of the fish collected were natives. Bluehead sucker comprised <br />45% of the catch. flannelmouth sucker. 42%. White sucker comprised the <br />largest number of nonnative fish (2%). <br /> <br />Native fish fin-clipped and released upstream of Redlands Diversion Dam <br />dispersed upstream. some as far as 57 river miles to the base of <br />Hartland Diversion Dam. Of 7.187 flannelmouth sucker. bluehead sucker. <br />and roundtail chub fin-clipped and released upstream of the Redlands <br />Diversion Dam between 24 June and 6 September 1996. 55 flannelmouth <br />sucker. 46 bluehead sucker. and three roundtail chub were recaptured in <br />September and October upstream of the dam. This accounted for 1_9%. <br />1.2%. and 0.2% of the total number of each species fin,clipped at the <br />dam. respectively. during 1996. <br /> <br />Of the eleven adult Colorado squawfish that were implanted with 360-day <br />LOTEK@ radiotags during May and June. none used the fish passageway. <br />One land-based tracking station located at the dam and two located <br />downstream in the 2.3-mile reach of the Lower Gunnison River constantly <br />monitored and logged any movement of radiotagged fish in the vicinity. <br />Four radiotagged fish occupied the plunge pool of the Redlands <br />Diversion Dam intermittently between 17 June and 16 October. <br /> <br />1m <br /> <br />In 1997. eighteen sub-adult and adult Colorado squawfish (total length <br />range=383-763; mean=537 mm) ascended the fish passageway compared to <br />only one adult Colorado squawfish that was collected in the fish trap <br /> <br />Redlands 5 <br />