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Habitat change was evaluated under high (4000 cfs) and low flow (800 cfs) <br />regimens. Presence/absence of YOY Colorado squawfish in dffferent habitats <br />was determined from seining collections. Ia previous years 1980 aad 1981, <br />young Colorado squawfish were marked by fin clipping and followed over the <br />period of flow change. <br />RAZORBACK SUCKER SPAiiNING COLLECTIONS <br />Recorded capture sites of razorback sucker from the Green River were <br />obtained from earlier studies and CRFP data (Tyus et al. t982a), and probable <br />spawning areas were investigated by eleccrofishiag during the Spring Survey <br />Program. In 1985, 5 razorback sucker were implanted with radiotransmittera <br />and tracked. Nicrohabitat data were recorded for each radio contact. All <br />razorback suckers were tagged with Carlin dangler Lags. Data from 1986 <br />studies are included. <br />CHUB COLLECTIONS <br />Collections of roundtail and humpback chubs were made incidental to other <br />sampling programs between 1982-1985. Fishes were captured by electrofiahing <br />and trammel netting. Angling was initiated in 1985, using worms and 14oraon <br />crickets. All G11a species were weighed. measured and photographed on a 1 cmZ <br />grid board for future taxonomic work. <br />SENSITIVE ARBA ANALYSIS <br />Sensitive areas and general species distribution were determined from <br />radiotelemetry, catch data, and other information. Concentration areas were <br />obtained by using catch-effort data as an indication of relative abundance. <br />zo <br />