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a 17 easier in backwaters than in the fast-moving river and, up to a point, high 0 conductivity increases the effectiveness of the electrical current. Tributary stream backwaters of about boat width (4 m) tend to be much narrower than man-made backwaters, resulting in greater catches of fish. i Man-made backwaters tend to be large and pond-like, resulting in ability to capture a smaller sample of the population. Summer sampling r The total number of fish collected during the summer (July 6-11, 14-21) by all gear types and all sample types combined are as follows: number of fish collected - 1051 including: number of humpback chub - 3; number of squawfish - 18 (including 1 observed); and number of pike - 4. S V s Summer intensive sites included Lilly Park, Sunbeam, Juniper Springs, and Cleopatra's Couch within Yampa Canyon. At the intensive sites, flannelmouth and bluehead suckers, and roundtail chub again were highest in relative abundance (Figure 3). White sucker were also high in abundance at the uppermost site, Juniper Springs. Within the Cleopatra's Couch intensive of Yampa Canyon, channel catfish were also relatively high in abundance (25%) and equal in number captured (n=20) to roundtail chub (Figure 3). Three squawfish and two humpback chub were collected at the Yampa Canyon intensive site. At the upper intensive sites, five squawfish were collected, including one that was observed but not captured at the Sunbeam site. Among introduced species collected were three northern pike at Lilly Park and one smallmouth 10 bass (Micropterus dolomieui) at Juniper Springs. Two additional squawfish were collected by angling at Juniper Springs; these were special samples a since they were not collected by standardized sampling methods. Intervening sampling was conducted at several sites in Yampa Canyon and one site near the Sunbeam area. One humpback chub was collected during W