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~..~~ - <br />e ! <br />i <br />i <br />~ ^,olorado River Squawfish <br />_37_ <br />Ptychocheilus lucius Girard <br />The Colorado River Squawfish is confined to the Colorado River drain- <br />age and is the largest member of the Cyprinidae family found in tiorth <br />A: erica. In the lower Colorado River it may attain a length of 5 feet and <br />a weight of 80 pounds. Older residents of Green River, Wyoming report that <br />;peci~ens weighing up to 30 pounds have been taken in that vicinity, and <br />s~~ilar reports have been received from residents of Browns Park, Utah. <br />:.ocally, the squawfish has acquired common-names such as, ('whitefish and <br />rri*,e salmon." This species spawns during the spring, according to <br />3ecicnan, 1953• <br />Only two s,luawfish were collected in the Green River during 1959• <br />:~ese were taken from a deep pool in the Utah segment of the i*npoundment <br />=_^ea near Hideout Forest Camp. The largest specimen weighed 2.7 pounds <br />a::d had a total length of 21.4 inches. <br />Th¢ $u_~.wf' ~~'! v""~c.$ C_'~':Ti^vri 'n jhg roi~rado Riirci. prior to rnnc±ryi,~r±.i nn <br />c` Lakes Niead and Mona.ve, but has not been observed in either of these <br />=xes sincE. 'Jonez and Sumner, 1954! <br />:.edside srirer <br />Richardsonius balteatus (Richardson) <br />This minnow is native to the Columbia River Basin and the Bonneville <br />asi•".cf Utah and iadho. Three specimens were collected from the Green <br />:ver during 1938 and many in 1942. This indicates that it has been trans- <br />`er:•ed accidentally from the Bear and Snake Rivers by live bait fishermen <br />a"~ has increased rapidly. (Simon, 1946) . <br />The redside shiner constituted the largest number of fish in the collect- <br />~o"s °i 1959. This species constituted 49.2 percent of all fish collected <br />°xcluding fish taken from the tributary streams. All of the shiners collect- <br />°d =•". the river were taken near the shoreline while none were captured from <br />`~e Hain channel. One seine haul below the town of Green River, Wyoming <br />~'oduced 971 shiners with range in lengths varying from 1.8 to 2.3 inches. <br />~~° largest specimen collected had a length of 4.1 inches. This fish is <br />f~0w to attain a length of 5.25 inches . <br />si'~pson has observed the shiner preying upon newly released grayling <br />~~y' Nost of its food, howerver, consists of small aquatic insect ]arvae, <br />~'ustaceans and small amounts of plant debris. !Simon 1946). <br />`a°ckled dace <br />Rhinichthys osculus (Girard] <br />,•g Ttie speckled dace was commonly collected from the river, and most of <br />' tributary streams. Several dace were observed spawning in gravel at <br />~.e erd of a riffle area on Blacks Fork during July 11, 1959 and a few <br />