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;Z V. Table 7.' Total numbers and percentage composition of fishes collected at each trend tone sampling site (all habitats combined) in the Yampa River between Yaybell and Sunbeam, Colorado. 27 through 31 July 1977. Collection Sitea: A B C D E F G A Date (day): 27/28 28 28 30 30 30 30 31 Time: 10-12 P4 2-3 PIA. 4-5 Py 10-12 AM 1-2 PM 3-4 P4 5-6 P4 10-12 AK 8-12 AY. Water Temperature (C): 21 25-32 24-27 22-23 23-27 25-26 26 20-23 Habitats Sampled b: abcef acde bed acf ace acf ace abce Length Group (-x TL)c: 20_ `20? 20 'c 20 < 20; s 20 - s 20= i20 Total Fish Collected: 643 968 185 606 362 555 100 821 322 287 457 519 10 303 47 331 2 Compositiond: Prosopium williamsoni - - - - - - - a - - - - - - - - Cyprlnus carpio * 18 1 14 - 23 3 2 - 9 1 15 - 1 - 4 Gila robusta 1 8 5 22 1 6 4 15 - 2 * 6 - 2 - 8 Notropis strarineus 14 27 34 8 - * 5 10 10 1 * 1 - 3 - - Pimephales prorelas 68 13 44 9 74 4 45 2 81 16 96 1 20 - 40 2 Rhinichthys osculus 30 15 10 9 7 42 21 16 2 30 1 16 70- 41 32 27 Richardsonius balteatus 5 3 1 3 16 17 21 8 4 5 1 4 - 1 2 6 R. balteatus X R. osculus? - - - - - - - a - - - - - - - - Catostorus co-.ersnni - * - * - 1 - 2 - 1 - 4 - 1 - 1 Catostorus disrobolus * 4 1 14 1 a 1 6 3 25 - 7 10 1 2 6 Catostorus latininnis * 11 - 19 - 6 - 34 - 10 - 43 - 50 - 38 C. commersoni X discoboluse - * - 1 - - - * - - - - - - - - C. tommersoni X latioinni,a - 1 - - - - - 1 - - - 3 - - - - Catostomids, unidentifiedf - - - - - - - 2 - - - - - - - - lctalurus melas a - - Fundulus kansae 5 a * - - - - - - - - - 23 5 Cottus bairdi - 1 - - - - - - - - * - 1 - 1 a. See maps included in this report for location of collection sites. b. Key to generalized habitat types: a- backwater, b- pool, c- shoreline, d- chute channel, e- riffle, f- rtm. e. Larvae and juveniles less than or equal to 20 mm TL ( 1220) were probably spawned within about five weeks of the date of collection. Specimens greater than 20 mm TL UP') include older larvae and young-of-the- year juveniles as well as older juveniles and adults. d. * - <0.5%; - - no specimens collected. a. The Identity of the smaller specimens as catostomid hybrids is tentative. In addition, a few of-the smaller specimens identified as pure species may in fact be hvbrids, f. Specimens were field processed and released before identity could be ascertained. - It