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27 <br />Table 6. Su-.wry of total numbers and percentage comnosition of fishes collected at Colorado Division of <br />Wildlife trend zones for population and habitat monitorinR of the endangered C.ila evpt,i (humpback <br />chub) and Pt_wchccheilus lueius (Colorado sc!uavfish) in 1977. <br />Trend Zone a; Tampa R., White R., Colorado R., Gunnison R., Colorado R., <br />Maybell - Rio Blanco L. Palisade - Whitewater - Lora - <br />Sunbeam Co. Rd. 65 Clifton Redlands Dam CO-UT Border <br />Dates Sanpled: 27-31 July 31 July- 2 Aug. 11-13 August 13-14 August 16-19 August <br />Water Temperatures (C) <br />Mean (USUS): <br />Range (Collections): 20-3 2 <br />?Sean Flow (1;SGS, m3/see): <br />Length Group (= TL)b: 20 < <br />Total Fish Collected: 2126 4390 <br />S Corpositionc: <br />Prosopiu^. williamsoni - <br />C)Trinus carpin. 1 12 <br />Gila robusta 1 30 <br />Notropis lu,rensis - - <br />Notropis strzaineus 9 9 <br />Pime hales nrorelas 73 6 <br />Rhinichthvs osculus a 22 <br />Richardsonius balteatus 6 6 <br />R. balteatres A R. osculits? - <br />Catostonus cornersoni - 1 <br />Catostomus discobolus 1 7 <br />Catostomus latipinnis * 24 <br />C. eomnersorl R C. discobolusd - <br />C. commersoni R C. latioinnisd - 1 <br />Catostomids, unidentifiede - <br />Ictal /us relas <br />Icta urus punctatus - - <br />F ulus kansae 1 <br />C mbusia affinis - - <br />3e orris cvanellus - - <br />Micropterus salmoides - - <br />Cottus bairdi - s <br />16-30 16-28 20-25.5 19-24 <br />i5 20 - te 20 -- !s 20 - %S 20 - <br />384 2680 647 1323 117 1844 310 2400 <br /> <br />- 2 * 3 - 1 - 1 <br />10 20 1 22 - 22 - 6 <br />- 7 21 22 2 3 54 28 <br />- - 14 16 91 6 13 19 <br />3 3 60 24 8 63 33 38 <br />83 48 - 6 - 4 - 3 <br /> <br />4 8 1 3 - 2 - <br />* 12 _ 2 _ * - <br /> <br />_ • - - - - - 2 <br />- - • 1 - - - 1 <br /> <br /> <br /> <br /> <br />a, See maps included in this report for location of collection sites. <br />b. Larvae and juveniles less than or equal to 20 mm TL (= 20) were probably spaamed within about five weeks of <br />the date of collection. Specimens greater than 20 mm TL (20 -) include older larvae and young-of-the-year <br />juveniles as well as older juvenile and adults. <br />C' * - - - no specimens collected. <br />d. The identity of the smaller specimens as catostomid hybrids is tentative. In addition, a few of the smaller <br />specimens identified as pure species may in fact be hybrids. <br />a. Specimens were field processed and released prior to specific identification.