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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)

Abstract

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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Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

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

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