, Volume 94, Issue 3, pp 303–306 | Cite as

Invasion of an occupied niche by the crayfish Orconectes rusticus: potential importance of growth and mortality

  • Anna M. Hill
  • Damon M. Sinars
  • David M. Lodge
Original Papers


We are exploring mechanisms of an invasion that contradicts the oft-cited generalization that species invade vacant niches. In northern Wisconsin lakes, the introduced crayfish Orconectes rusticus is replacing two ecologically similar resident congeners, O. virilis and O. propinquus. In laboratory experiments, we compared growth and mortality of individually maintained crayfish offered one of five ad libitum diets: invertebrates, macrophytes, dentritus, periphyton or all items combined. Mortality was highest for O. virilis and lowest for O. rusticus. Macrophyte diets yielded the highest mortality. All three species grew best on invertebrate and combination diets but grew little or not at all on diets of periphyton, detritus or macrophytes. O. rusticus and O. virilis grew more than O. propinquus. O. rusticus grew more quickly and/or was better able to survive overall than its congeners. Therefore, O. rusticus would probably have advantages over O. virilis and O. propinquus in competitive interactions, reproductive success and avoiding size-selective fish predation. Subtle interspecific differences may interact strongly with other ecological factors and contribute to the displacement of resident species from a well-occupied niche.

Key words

Invasion Growth Diet Orconectes Crayfish 


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  1. Capelli GM (1982) Displacement of northern Wisconsin crayfish by Orconectes rusticus (Girard). Limnol Oceanogr 27:741–745Google Scholar
  2. Capelli GM, Munjal BJ (1982) Aggressive interactions and resource competition in relation to species displacement among crayfish of the genus Orconectes. J Crust Biol 2:486–492Google Scholar
  3. Corey S(1987) Comparative fecundity of four species of crayfish in southwestern Ontario, Canada (Decapoda, Astacidea). Crustaceana 52:276–280Google Scholar
  4. DiDonato GT, Lodge DM (1993) Species replacements among Orconectes crayfishes in Wisconsin lakes: the role of predation by fish. Can J Fish Aquat Sci (in press)Google Scholar
  5. Ehrlich PR (1989) Attributes of invaders and the invading processes: vertebrates. In: Drake JA, Mooney HA, di Castri E, Groves RH, Kruger FJ, Rejmanek M, Williamson M (eds) Biological Invasions: A Global Perspective. John Wiley & Sons, New York, pp 315–328Google Scholar
  6. Fuller RL, Mackay RJ (1981) Effects of food quality on the growth of three Hydropsyche species (Trichoptera: Hydropsychidac). Can J Zool 59:1133–1140Google Scholar
  7. Garvey JE (1992) Selective predation as a mechanism of crayfish species replacement in northern Wisconsin lakes. M.S. Thesis, The Ohio State University, Columbus, OHGoogle Scholar
  8. Lodge DM (1991) Herbivory on freshwater macrophytes. Aquatic Botany 41:195–224Google Scholar
  9. Lodge DM (1993) Species invasions and deletions: community effects and responses to climate and habitat change. In: Karieva P, Kingsolver J, Huey R (eds) Biotic Interactions and Global Change. Sinauer, Sunderland, Massachusetts, pp 367–387Google Scholar
  10. Lodge DM, Lorman JG (1987) Reductions in submersed macrophyte biomass and species richness by the crayfish Orconectes rusticus. Can J Fish Aquat Sci 44:591–597Google Scholar
  11. Lodge DM, Kratz TK, Capelli GM (1986) Long-term dynamics of three crayfish species in Trout Lake, Wisconsin. Can J Fish Aquat Sci 43:993–998Google Scholar
  12. Momot WT, Gowing H, Jones PD (1978) The dynamics of crayfish and their role in ecosystems. Am Midl Nat 99:10–35Google Scholar
  13. Olsen TM, Lodge DM, Capelli GM, Houlihan R (1991) Impact of the introduced crayfish, Orconectes rusticus, in northern Wisconsin lakes: laboratory and long-term field studies. Can J Fish Aquat Sci 48:1853–1861Google Scholar
  14. Rabeni CF (1985) Resource partitioning by stream-dwelling crayfish: the influence of body size. Am Midl Nat 113(1):20–29Google Scholar
  15. Simberloff D (1981) Community effects of introduced species. In: Nitecki MH (ed) Biotic Crises in Ecological and Evolutionary Time. Academic Press, New York, pp 53–81Google Scholar
  16. Sokal RR, Rohlf FJ (1981) Biometry. Second Edition. W.H. Freeman and Co., New YorkGoogle Scholar
  17. Werner EE, Gilliam JF (1984) The ontogenetic niche and species interactions in size-structured populations. Ann Rev Ecol Syst 15:393–425Google Scholar

Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • Anna M. Hill
    • 1
  • Damon M. Sinars
    • 1
  • David M. Lodge
    • 1
  1. 1.Department of Biological SciencesUniversity of Notre DameNotre DameUSA

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