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I I I I I i I i i I I I I I I & . I I Another significant finding was the scarcity of nonnative fishes in the Little Snake River. Of 11,370 fish collected, 72% were native species. The seven native species included Colorado pikeminnow, humpback chub, roundtail chub (G. robusta), speckled dace (Rhinichthys osculus), bluehead sucker (Catostomus discobolus), flannelmouth sucker (C. latipinnis), and mottled sculpin (Cottus bairdO. The nine nonnative species included red shiner (Cyprinella lutrensis), common carp (Cyprinus carpio), fathead minnow (Pimephales promelas), redside shiner (Richardsonius balteatus), sand shiner (Notropis stramineus), white sucker (C. commersoml, creek chub (Semotilus atromaculatus), plains killifish (Fundulus zebrinus), and channel catfish (lctalurus punctatus). Large-bodied species (adult size L 200-mm total length) were largely composed (93%) of native flannelmouth sucker, bluehead sucker, and roundtciil chub. Percent composition of all large-bodied species remained relatively constant among longitudinal reaches and among seasons. Small-bodied species (adult size < 200-mm total length) were predominately (72%) nonnative sand shiner, reds ide shiner, and red shiner. The other 28% were native speckled dace and mottled sculpin. Percent composition of small-bodied species was relatively constant in all seasons except reds ide shiner percentages declined in autumn and redside shiner and red shiner percentages varied by reach. Larvae were collected for four native species: bluehead sucker, flannelmouth sucker, roundtail chub, and speckled dace and five nonnative species: white sucker, sand shiner, red shiner, fathead minnow, and redside shiner. Larvae of native species were the most frequently collected larvae of both small-bodied (85%) and large-bodied species (97%). VII