Competitive interactions between the rotifer Synchaeta oblonga and the cladoceran Scapholeberis kingi Sars

  • John J. Gilbert
Conference paper
Part of the Developments in Hydrobiology book series (DIHY, volume 52)


Competition experiments showed that the small cladoceran Scapholeberis kingi rapidly excluded the rotifer Synchaeta oblonga from mixed-species cultures, but was itself unaffected by the presence of S. oblonga. Short-term experiments testing the effect of S. kingi on the survivorship and reproduction of S. oblonga showed that the former imposed a high mortality on the latter, even though shared food resources were abundant. These results indicate that adult S. kingi mechanically interferes with S. oblonga either by ingesting, or by rejecting in a damaged condition, individuals swept into its branchial chamber. In contrast to many other small species of cladocerans, and like large species of Daphnia, S. kingi has the potential to markedly suppress populations of some rotifer species through a combination of interference and exploitative competition.

Key words

competition interference Scapholeberis Synchaeta zooplankton 


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  1. Burns, C. W. & J. J. Gilbert, 1986a. Effects of daphnid size and density on interference between Daphnia and Keratella cochlearis. Limnol. Oceanogr. 31: 848–858.CrossRefGoogle Scholar
  2. Burns, C. W. & J. J. Gilbert, 1986b. Direct observations of the mechanisms of interference between Daphnia and Keratella cochlearis. Limnol. Oceanogr. 31: 859–866.CrossRefGoogle Scholar
  3. Dumont, H. J. & J. Pensaert, 1983. A revision of the Scapholeberinae (Crustacea: Gadocera). Hydrobiologia 100: 3–45.CrossRefGoogle Scholar
  4. Edmondson, W. T., 1974. Secondary production. Mitt. int. Ver. Limnol. 20: 229–272.Google Scholar
  5. Gasith, A. & A. S. Perry, 1985. Use of limnocorrals for pesticide toxicity studies: effect on zooplankton composition and dynamics. Verh. int. Ver. Limnol. 22: 2432–2436.Google Scholar
  6. Gilbert, J. J., 1985. Competition between rotifers and Daphnia. Ecology 66: 1943–1950.CrossRefGoogle Scholar
  7. Gilbert, J. J., 1988a. Suppression of rotifer populations by Daphnia: a review of the evidence, the mechanisms, and the effects on zooplankton community structure. Limnol. Oceanogr. 33: 1286–1303.CrossRefGoogle Scholar
  8. Gilbert, J. J., 1988b. Susceptibilities of ten rotifer species to interference from Daphnia pulex. Ecology. 69: 1826–1838.CrossRefGoogle Scholar
  9. Gilbert, J. J. & R. S. Stemberger, 1985. Control of Keratella populations by interference competition from Daphnia. Limnol. Oceanogr. 30: 180–188.CrossRefGoogle Scholar
  10. Gilbert, J. J. & H. J. MacIsaac, 1989. The susceptibility of Keratella cochlearis to interference from small cladocerans. Freshwat. Biol. 22: in press.Google Scholar
  11. Goulden, C. E., 1968. The systematics and evolution of the Moinidae. Trans, am. phil. Soc. NS 58(6): 1–98.CrossRefGoogle Scholar
  12. MacIsaac, H. J. & J. J. Gilbert. Competition between rotifers and cladocerans of different body sizes. Oecologia (Berlin). In press.Google Scholar
  13. SAS (Statistical Analysis System) Institute, 1985. User’s guide: statistics ed. 5. Cary, North Carolina, USA.Google Scholar
  14. Sokal, R. R. & F. J. Rohlf, 1981. Biometry. W. H. Freeman and Co., San Francisco, California, USA.Google Scholar
  15. Stemberger, R. S., 1981. A general approach to the culture of planktonic rotifers. Can. J. Fish. aquat. Sci. 38:721–724.CrossRefGoogle Scholar

Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • John J. Gilbert
    • 1
  1. 1.Department of Biological SciencesDartmouth CollegeHanoverUSA

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