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y . TyitE <br />18 <br />Table 3~^Occurrence of food items in channel-catfish stomachs containing <br /> <br />food, Green and Yampa <br />rivers, ,r a~~ ~ ~ <br />1987 ~988~'(r~--dumber <br />of stomachs), <br /> <br /> fish total length (mm) <br />Food items n % average range SQ <br /> <br />Mice <br />Green River 1 0.3 721 p~ O~~ <br />Yampa River 9 2.5 407 339-480 49.6 <br />Fish <br />Green River 18 6.2 443 264-756 151.7 <br />Yampa River 26 7.7 398 261-521 64.8 <br />Terrestrial insects <br />Green River 60 21 291 100-702 83.5 <br />Yampa River 87 24 333 231-502 60.2 <br />Aquatic invertebrates <br />Green River 95 33 313 164-546 61.6 <br />Yampa River 108 30 329 157-502 58.9 <br />Vascular plants <br />Green River 75 26 300 100-702 86.0 <br />Yampa River 107 29 338 160-502 64.5 <br />Algae, detritus <br />Green River 42 14 354 2I0-546 71.5 <br />Yampa River 26 7 308 147-470 76.3 <br />