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Elkhead Creek Aquatic Resource Report Miller Ecological Consultants, December 5, 1996 Table 1. Fish species codes. 7 CODE SCIENTIFIC NAME CONINION NANIE CA I DIS ` C utu?lon?uc disc'oho11o Ifluchc i Stucker CATCOM Catostontus conat7lel?SOni IVl>_ite Sacker CATLAT* Catoslo1ruts latipinnis H mnelmouith Sucker COTBAI* Cottus bairdi Mottled Sculpin GILROB* Gila robusta Roundtail Chub LLPMAC Lepomis macrochirus Bluegill h1 I CDOL Micropterus dolomieui Smallmouth Bass PINIPRO Pimephales promelas Fathead Minnow POMNIG Pomoxis nigromaculatus Black Crapppie RICBAL Richardsonius balteatus Redside Shiner RHIOSC* Rhlnl chth.is oNculus Spccklcd Dice SEMATR 'S'Cm oliltrs alromaculalus Creek Chub SUCKERX Hybrid Sucker *Native species Site 1 Smallmouth bass (Micropterus dolomieui) had the highest relative abundance composing 30% of the fish collected at this station (Table 2, Fig. 4). The second most abundant species was a native fish speckled dace (Rhinichthys osculus) followed by creek chub (Semotilus atromaculatus), white sucker (Catostomus commersoni) and mottled Sculpin (Cottus bairdi), respectively. Non-native species comprised approximately 61% of the taxa and approximately 71% of the individuals captured at Site 1. Native species comprised less than 40% of the taxa and less than 29% of the individuals captured at this site. Roundtail chub (Gila robusta), a native species, was not collected at this site (Table 2, Fig 4.). Several species typically found in reservoirs were collected from this site, including black ' crappie, bluegill and fathead minnow. The smallmouth bass collected at this site were predominately young of the year in the 50mm size class. The absence of adult fish seems ' to indicate that Elkhead Reservoir is the source of these fish rather than being spawned in situ (Fig. 5).