Environmental Biology of Fishes

, Volume 49, Issue 3, pp 271–291 | Cite as

Invading species in the Eel River, California: successes, failures, and relationships with resident species

  • Larry R. Brown
  • Peter B. Moyle


We examined invasions of non-native fishes into the Eel River, California. At least 16 species of fish have been introduced into the drainage which originally supported 12–14 fish species. Our study was prompted by the unauthorized introduction in 1979 of Sacramento squawfish, Ptychocheilus grandis, a large predatory cyprinid. From 1986 to 1990, we conducted growth and diet studies of squawfish, conducted intensive surveys of the distribution and habitat associations of both native and introduced species, and examined the nature of species-habitat and interspecies relationships. We found no evidence for increased growth or expanded feeding habits, compared to native populations, of Sacramento squawfish as they invaded the Eel River drainage. Ten of the introduced species were well established, with four species limited to a reservoir and six species established in streams. The success or failure of introductions of stream species appeared to be a function of the ability of a species to survive the fluctuating, highly seasonal, flow regime. The present mixture of native and exotic species has not formed stable fish assemblages but it seems likely that four habitat-associated assemblages will develop. The overall effect of the successful species introductions has been to assemble a group of species, with some exceptions, that are native to and occur together in many California streams. The assemblages now forming are similar to those found in other California streams. The assemblage characterized by squawfish and suckers is likely to be resistant to invasion, in the absence of human caused habitat modifications.

Sacramento squawfish Ptychocheilus grandis introduced species exotic species Eel River assemblage organization 


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References cited

  1. Alford, R.A. & H.M. Wilbur. 1985. Priority effects in experimental pond communities: competition between Bufo and Rana. Ecology 66: 1097–1105.Google Scholar
  2. Allan, J.D. & A.S. Flecker. 1993. Biodiversity conservation in running waters: identifying the major factors that affect destruction of riverine species and ecosystems. Bioscience 43: 32–43.Google Scholar
  3. Azuma, M. 1992. Ecological release in feeding behavior: the case of bluegills in Japan. Hydrobiologia 243/244: 269–276.Google Scholar
  4. Baltz, D.M. & P.B. Moyle. 1993. Invasion resistance to introduced species by a native assemblage of California stream fishes. Ecol. Appl. 3: 246–255.Google Scholar
  5. Baltz, D.M., B. Vondracek, L.R. Brown & P.B. Moyle. 1987. Influence of temperature on microhabitat choice of fishes in a california stream. Trans. Amer. Fish. Soc. 116: 12–20.Google Scholar
  6. Baltz, D.M., P.B. Moyle & N.J. Knight. 1982. Competitive interactions between benthic stream fishes, riffle sculpin, Cottus gulosus, and speckled dace, Rhinichthys osculus. Can. J. Fish. Aquat. Sci. 39: 1502–1511.Google Scholar
  7. Brown, L.R. 1990. Age, growth, feeding and behavior of Sacramento squawfish (Ptychocheilus grandis) in Bear Creek, Colusa County, California. Southwestern Nat. 35: 249–260.Google Scholar
  8. Brown, L.R. & A. Brasher. 1995. Effects of predation by Sacramento squawfish (Ptychocheilus grandis) on habitat choice of California roach (Lavinia symmetricus) and rainbow trout (Oncorhynchus mykiss) in artificial streams. Can. J. Fish. Aquat. Sci. 52: 1639–1646.Google Scholar
  9. Brown, L.R. & P.B. Moyle. 1993. Distribution, ecology, and status of the fishes of the San Joaquin River drainage, California. California Fish and Game 79: 96–114.Google Scholar
  10. Brown, L.R. & P.B. Moyle. 1991. Changes in habitat and microhabitat partitioning within an assemblage of stream fishes in response to predation by Sacramento squawfish (Ptychocheilus grandis). Can. J. Fish. Aquat. Sci. 48: 849–856.Google Scholar
  11. Brown, L.R., S.A. Matern & P.B. Moyle. 1995. Comparative ecology of prickly sculpin, Cottus asper, and coastrange sculpin, Cottus aleuticus, in the Eel River, California. Env. Biol. Fish. 42: 329–343.Google Scholar
  12. Brown, L.R., P.B. Moyle & R.M. Yoshiyama. 1994. Historical decline and current status of coho salmon (Oncorhynchus kisutch) in California. N. Amer. J. Fish. Manag. 14: 237–261.Google Scholar
  13. Cech, J.J., Jr., S.J. Mitchell, D.T. Castleberry & M. McEnroe. 1990. Distribution of California stream fishes: influence of environmental temperature and hypoxia. Env. Biol. Fish. 29: 95–105.Google Scholar
  14. Diamond, J. & T.J. Case (ed.). 1986. Community ecology. Harper and Row, New York. 665 pp.Google Scholar
  15. Drake, J.A., H.A. Mooney, F. di Castri, R.H. Groves, F.J. Kruger, M. Rejmanek & M. Williamson (ed.). 1989. Biological invasions: a global perspective. John Wiley and Sons, New York. 525 pp.Google Scholar
  16. Drake, J.A. 1990. The mechanics of community assembly and succession. J. Theor. Biol. 147: 213–233.Google Scholar
  17. Drake, J.A. 1991. Community assembly mechanics and the structure of an experimental species ensemble. Amer. Nat. 137: 1–26.Google Scholar
  18. Fite, K.R. 1973. Feeding overlap between roach and juvenile steelhead in the Eel River. Master's Thesis, California State University at Humboldt, Arcata. 38 pp.Google Scholar
  19. Fraser, C. McL. 1916. Growth of the spring salmon. Trans. Pacif. Fish. Soc. Seattle 1915: 29–39.Google Scholar
  20. Gilpin, M.E., M.P. Carpenter & M.J. Pomerantz. 1986. The assembly of a laboratory community: multispecies competition in Drosophila. pp. 23–40. In: J. Diamond & T.J. Case (ed.) Community Ecology, Harper and Row, New York.Google Scholar
  21. Goldschmidt, T., F. Witte & J. Wanink. 1993. Cascading effects of the introduced Nile perch on the detritivorous/phytoplanktivorous species in the sublittoral areas of Lake Victoria. Conserv. Biol. 7: 686–700.Google Scholar
  22. Hughes, N.F. 1986. Changes in the feeding biology of the Nile perch, Lates niloticus (L.) (Pisces:Centropomidae), in Lake Victoria, East Africa since its introduction in 1960 and its impact on the native fish community of the Nyanza Gulf. J. Fish Biol. 29: 541–548.Google Scholar
  23. Hughes, N.F. 1992. Growth and reproduction of the Nile perch, Lates niloticus, an introduced predator in the Nyanza Gulf, Lake Victoria, East Africa. Env. Biol. Fish. 33:299–305.Google Scholar
  24. Huntington, C., W. Nehlsen & J. Bowers. 1996. A survey of healthy native stocks of anadromous salmonids in the Pacific Northwest and California. Fisheries 21: 6–14.Google Scholar
  25. Kubicek, P.F. 1977. Summer water temperature conditions in the Eel River system, with reference to trout and salmon. Master's Thesis, California State University at Humboldt, Arcata. 200 pp.Google Scholar
  26. Levins, R. 1968. Evolution on changing environments. Princeton University Press, Princeton. 120 pp.Google Scholar
  27. Li, H.W. & P.B. Moyle. 1981. Ecological analysis of species introductions into aquatic systems. Trans. Amer. Fish. Soc. 110: 772–782.Google Scholar
  28. Lisle, T.E. 1982. The recovery of stream channels in north coastal California from recent large floods. pp. 31–42. In: K.A. Hashhagen (ed.) Habitat Disturbance and Recovery, Proceedings of a Symposium, California Trout Inc., P.O. Box 2046, San Francisco.Google Scholar
  29. Lodge, D.M. 1993a. Species invasions and deletions: community effects and responses to climate and habitat change. pp. 367–387. In: P.M. Kareiva, J.G. Kingsolver & R.B. Huey (ed.) Biotic Interactions and Global Change, Sinauer Associates, Sunderland.Google Scholar
  30. Lodge, D.M. 1993b. Biological invasions: lessons for ecology. Trends Ecol. Evol. 8: 133–137.Google Scholar
  31. Lufkin, A. 1991. California's salmon and steelhead: the struggle to restore an imperiled resource. University of California Press, Berkeley. 305 pp.Google Scholar
  32. McDowall, R.M. 1988. Diadromy in fishes. Timber Press, Portland. 308 pp.Google Scholar
  33. Meffe, G.K. 1991. Failed invasion of a southwestern blackwater stream by bluegills: implications for conservation of native communities. Trans. Amer. Fish. Soc. 120: 333–338.Google Scholar
  34. Mooney, H.A. & J.A. Drake (ed.). 1986. Ecology of biological invasions of North America and Hawaii. Springer Verlag, New York. 321 pp.Google Scholar
  35. Moyle, P.B. 1976. Inland fishes of California. University of California Press, Berkeley. 405 pp.Google Scholar
  36. Moyle, P.B. 1986. Fish introductions into North America: patterns and ecological impact. pp. 27–43. In: H.A. Mooney & J.A. Drake (ed.) Ecology of Biological Invasions of North America and Hawaii, Springer Verlag, New York.Google Scholar
  37. Moyle, P.B. & R.A. Daniels. 1982. Fishes of the Pit River system, McCloud River system and the Suprise Valley region. Univ. Calif. Press Publ. Zool. 115: 1–82.Google Scholar
  38. Moyle, P.B. & R.L. Leidy. 1991. Loss of biodiversity in aquatic ecosystems. pp. 127–170. In: P.L. Feidler & S.K. Jain (ed.) Conservation Biology: the Theory and Practice of Nature Conservation, Preservation, and Management, Chapman and Hall, New York.Google Scholar
  39. Moyle, P.B. & T. Light. 1996a. Biological invasions of freshwater: can effects on native biota be predicted? Biol. Cons. (in press).Google Scholar
  40. Moyle, P.B. & T. Light. 1996b. Fish invasions in California: do abiotic factors determine success. Ecology (in press).Google Scholar
  41. Moyle, P.B. & R.D. Nichols. 1973. Ecology of some native and introduced fishes of the Sierra Nevada foothills in central California. Copeia 1973: 478–490.Google Scholar
  42. Moyle, P.B., H.W. Li & B. Barton. 1986. The Frankenstein effect: impact of introduced fishes on native fishes in North America. pp. 415–426. In: R.H. Stroud (ed.) Fish Culture in Fisheries Management, American Fisheries Society, Bethesda.Google Scholar
  43. Nehlsen, W., J.E. Williams & J.A. Lichatowich. 1991. Pacific salmon at the crossroads: stocks at risk from California, Oregon, Idaho, and Washington. Fisheries 16: 4–21.Google Scholar
  44. Ogutu-Ohwayo, R. 1990. Changes in the prey ingested and the variations in the Nile perch and other fish stocks of Lake Kyoga and the northern waters of Lake Victoria (Uganda). J. Fish Biol. 37: 55–63.Google Scholar
  45. Post, W.M. & S.L. Pimm. 1983. Community assembly and food web stability. Mathemat. Biosci. 64: 169–192.Google Scholar
  46. Power, M. 1990. Effects of fish in river food webs. Science 250: 811–814.Google Scholar
  47. Ricklefs, R.E. 1987. Community diversity: relative roles of local and regional processes. Science 235: 167–171.Google Scholar
  48. Robinson, J.V. & J.E. Dickerson, Jr. 1987. Does invasion sequence affect community structure? Ecology 68: 587–595.Google Scholar
  49. Robinson, J.V. & M.K. Edgemon. 1988. An experimental evaluation of the effect of invasion history on community structure. Ecology 69: 1410–1417.Google Scholar
  50. Saruwatari, T. 1995. Temporal utilization of a brackish water lake, Lake Hinuma, as a nursery ground by amphidromous ayu, Plecoglossus altivelis (Plecoglossidae) larvae. Env. Biol. Fish. 43: 371–380.Google Scholar
  51. Smith, J.J. 1982. Fishes of the Pajaro River system. Univ. Calif. Publ. Zool. 115: 85–169.Google Scholar
  52. Taft, A.C. & G.I. Murphy. 1950. The life history of the Sacramento squawfish (Ptychocheilus grandis). California Fish and Game 36: 147–164.Google Scholar
  53. Taylor, T.L., P.B. Moyle & D.G. Price. 1982. Fishes of the Clear Lake Basin. Univ. Calif. Publ. Zool. 115: 173–223.Google Scholar
  54. Werner, E. 1986. Species interactions in freshwater. pp. 344–358. In: J. Diamond & T.J. Case (ed.) Community Ecology, Harper and Row, New York.Google Scholar
  55. Wilbur, H.M. & R.A. Alford. 1985. Priority effects in experimental pond communities: responses of Hyla to Bufo and Rana. Ecology 66: 1106–1114.Google Scholar
  56. Wikramanayake, E.D. & P.B. Moyle. 1989. Ecological structure of tropical fish assemblages in wet-zone streams of Sri Lanka. J. Zool., Lond. 218: 503–526.Google Scholar
  57. Zaret, T.M. & R.T. Paine. 1973. Species introduction in a tropical lake. Science 182: 449–455.Google Scholar

Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • Larry R. Brown
    • 1
  • Peter B. Moyle
    • 1
  1. 1.Department of Wildlife, Fisheries and Conservation BiologyUniversity of CaliforniaDavisU.S.A

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