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• Paris River Fish Monitoring Annual Report Golden shiners feed on algae, invertebrates and small fish (Hinckley 1973; Pflieger 1975) and may compete with flannelmouth suckers and speckled dace for invertebrates (Arizona Game and Fish Department 1996a). Because of interactions with native fish, golden shiner has been implicated in the demise of the Little Colorado River spinedace Lepidomeda vittata in Chevalon Creek, Arizona (Hinckley and Carufel 1967). It appears unlikely that golden shiners will colonize the Paris River upstream of its mouth and frequent flooding will probably keep their abundance low in the generally small ponded area. However, it is possible that long-term • ponding of the mouth may allow this species to increase their numbers and impact the native flannelmouth suckers and speckled dace. Redside Shiner One redside shiner was captured in September and another two were captured in December (Table 6). These fish ranged in size from 40 - 90 mm and 0.4 - 5.3 g (Table 7). Redside shiners were also caught in 1997, when 18 were caught in the mouth of the Paris in July (Figure 6). The redside shiner is native to the Columbia River and Bonneville Basin drainages. It is also rare in the Colorado River and tributaries in Grand Canyon They are occasionally caught in the Paris River mouth (Browder and Hoffnagle 1997b) and they have been caught in the Colorado and lower Little Colorado rivers (Kaeding and Zimmerman 1983; Arizona Game and Fish Department 1996b). This fish is omnivorous and may compete with or prey on larval native species (Hinckley 1973; Sigler and Sigler 1996). However, it is rarefy captured in the Paris and • Colorado rivers, probably due to the Colorado River being too cold and the Paris River being too warm (Sigler and Sigler 1996}. Therefore, this species is unlikely to be detrimental to native fishes under the current environmental conditions in these streams. Rainbow Trout One rainbow trout was captured at Site 9 (800 m upstream from the mouth) in November (Table 6). This fish was 112 mm long and weighed 13 g (Table 7). Rainbow trout are the most common species offish in this reach of the Colorado River and they are occasionally captured in the mouth of the Paris River and a short distance upstream (Figure 6). However, the high • Ho9rwgle 1999, Paris Rive 1998 Amual Report Arizona Gam & Fish Depm~ent 21