Show jt f a j SJ s i s' s sf f iR a t J t tt tt t t t DON DUFF FISHERIES BIOLOGIST examines new fish h habitat in Willow Creek developed as a result of the log drop structure Fisheries make population studies By Thomas D D. D Fisheries Biologist The fisheries section of the Division of Wildlife Resources is responsible for an environmental environmental en en- inventory of the Uinta and Upalco Units of the Central Utah Project CUP The fisheries inventory involves making population estimates of both game fish trout whitefish bass and catfish and non-game non species and sIl and evaluating i II m ft it Tai not MJ 1 I. I J. J f I r ft FOUR RIVERS are currently being studied Lake fake Fork and Yellowstone Rivers Upalco Unit and the Uinta and Whiterocks Rivers Uinta Unit The major tributaries of the above streams are also being examined Population estimates are made by sampling the fishes with fishing electro-fishing gear An electrical field is set up in the water and the fish are attracted to a hand held electrode where they can be netted Each game fish is measured and weighed and a few scales are removed for age determination After examination the fishes are are replaced into the stream STREAM I HABITAT assessment involves collecting and identifying aquatic insects water chemistry analysis stream flows and an evaluation I o cover and pools pool fn in JI Ui lit r. r T for the V ff amA i. i ft fishes lt jT The e purpose 0 of this fie field IId stu study d Y is to suggest the minimum stream flows which will sustain sustain the maximum amount of fish |