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-2- <br />1. Determine the species of fish present in the rivers <br />and tributary streams and the specific conditions <br />under which the various species are found. <br />2. To study the chemical and physical characteristics <br />of the river and the tributaries and to determine <br />the diurnal and seasonal changes which occur. <br />3. To determine the types and distribution of bottom <br />organisms in the rivers and tributaries and their <br />importance as fish food. <br />4. To determine the possibility of establishing and <br />maintaining game fish in the proposed reservoirs <br />and determination of the forms which will be most <br />suited to these environments. <br />5. To determine the availability and condition of <br />spawning areas and prospective spawning areas and <br />methods whereby these areas may be improved. <br />6. As time and manpower permit, to examine the forms <br />and relative abundance of plankton in the rivers <br />and tributary streams. <br />Techniques Used: Fish samples were collected all along the rivers and at <br />all tributaries where sampling was possible. Seines, gill <br />nets, explosives (primaeord and dynamite), and set lines <br />were used to collect fish from the rivers. Rotenone, <br />seines and a common hGndscreen, used as an entrapment <br />device, were used to collect fish from the tributary <br />streams. The fish samples were preserved in formalde- <br />dyde and each collection was kept separate in an indi- <br />vidual plastic bag to be identified at a later date. A <br />stomach analysis was made to determine feeding habits. <br />Bottom fauna samples were taken from the rivers and trib- <br />utaries. Dip nets, composed of finely meshed cloth, and <br />handscreens were used to entrap these organisms. The <br />organisms were then preserved in 70 percent alcohol and <br />later identified by personnel of University of Utah, <br />Department of Biology. <br />Algae samples were collected and preserved in 1:22 parts <br />of lacto-phenol in water and stored in corked vials. <br />These samples were then identified when they reached the <br />University of Utah by Dr. Seville Flowers, Professor of <br />Botany. <br />