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Channel catfish ranged in size from 71-639 mm total length (mean = 443 mm). <br />Catfish had a more varied diet than bass or walleye. Shad, carp, channel <br />catfish, crayfish, and aquatic insects (primarily Hellgramites) were common <br />in catfish stomachs. Fifty percent of channel catfish had food in their <br />stomachs. <br />Four striped bass eggs were collected during 374 minutes of plankton <br />net sampling. One egg was collected in the main channel of the Colorado <br />River (river mile 198) on June 9 and another on June 17. Two additional eggs <br />were collected in a single tow in the slow moving water of Gypsum Canyon <br />(river mile 197.5) on June 16. <br />The egg collected on June 17 was evidently not fertilized and floated <br />to the surface of the sample suggesting that it was dead. The other 3 eggs <br />were alive at time of capture and appeared to be in initial stages of cell <br />division. Measurements of the three presumably fertilized eggs were similar <br />to those of a sample of fertilized striped bass eggs taken in North Carolina <br />(Mansueti 1958) (Table 4). <br />Utah Division of Wildlife Resources biologists captured 3 young-of-the- <br />year striped bass near Bullfrog basin and Hite on Lake Powell in 1980. Hence, <br />reproduction was at least partially successful near the upper end of the <br />reservoir (Mike OttenbaCher, Utah DWR Fishery Biologist, personal <br />communication, 1980). <br />Table 4. Measurements of preserved, fertilized striped bass eggs (Mansueti <br />1958) and preserved eggs collected near Gypsum Canyon, 1980. <br />Source Number Mean Diameter (mm) <br />of eggs Chorion Yolk Oil Globule <br />Mansueti (1958) 500 3.4 1.2 0.6 <br />Gypsum Canyon (1980) 3 3.1 1.2 0.6