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May 13 at RM 0.1 (Table 4). Between 1980 and 1984, researchers <br />from the USFWS reported 21 additional captures of razorback <br />suckers: 18 below RM 0.5 and three between RM 0.9 and 2.5 (ISMP <br />database). <br />ISMP sampling in the adjacent Green River has resulted in numerous <br />captures of razorback suckers at the Duchesne-Green River <br />confluence from 1985 through 1993 (ISMP database). All capture <br />records were during the months of April and May and likely <br />associated with high spring flows. No razorback suckers were <br />captured in the UFGD surveys in August 1956 or December 1968 when <br />Colorado squawfish captures were reported. <br />An October 1969 UFGD electrofishing survey on the lower Duchesne <br />River documented the presence of Gila species in the Duchesne and <br />Uinta Rivers (UDWR unpublished data). It is assumed that the <br />records were roundtail chubs (Gila robusta), although various names <br />(Colorado chub, bonytail chub) were used. On this survey, six <br />chubs were collected by electrofishing just east of Myton (approx. <br />RM 34.4), one chub, 4.5 inches (115 mm) was collected one mile <br />above Randlett,~ and another chub of the same length rom the Uinta <br />River near Ft . Duchesne . /~ d~ ~ ~~r/d ~/- <br />`'}f~~ <br />Mullans (1976) reported capturing one roundtail chub (> 5 inches <br />[125 mm]) 15.5 miles below Myton in 19"'5. Eight roundtails (6 ~ <br />inches) were captured upstream of tl~e L'inta Fciver confluence that <br />~.c <br />