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Influence of cyanobacterial diet on Asplanchna predation risk in Brachionus calyciflorus

  • Peter L. Starkweather
  • Elizabeth J. Walsh
Conference paper
Part of the Developments in Hydrobiology book series (DIHY, volume 52)

Abstract

Asplanchna sylvestrii does not discriminate between groups of Brachionus calyciflorus fed either the cymobacterixxm Anabaena flos-aquae or a control diet of Euglena gracilis. We based our analysis on the observed probabilities of attack, capture and ingestion during encounters between predator and prey. While A. sylvestrii was very sensitive to brachionid size, we found no significant affects of prey diet on predatory behavior. Thus, cyanobacterial diet did not influence the short-term predation risk of B. calyciflorus exposed to an effective predator. On the other hand, matched cohorts of A. sylvestrii fed B. calyciflorus cultured on the cyanobacterium reproduced more slowly than those fed the same prey cultured on the control food. With prolonged sympatry, therefore, the long-term risk of Asplanchna predation may be reduced for Brachionus by the latter’s consumption of cyanobacteria.

Key words

Anabaena Asplanchna Brachionus rotifer cyanobacteria feeding behavior predator-prey interaction 

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References

  1. Gilbert, J. J., 1980. Feeding in the rotifer Asplanchna: Behavior, cannibalism, selectivity, prey defenses and impact on rotifer communities, pp. 158–172. In: W. C. Kerfoot (ed.). Evolution and Ecology of Zooplankton Communities. University Press of New England. Hanover, NH.Google Scholar
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Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • Peter L. Starkweather
    • 2
  • Elizabeth J. Walsh
    • 1
  1. 1.Department of ZoologyOregon State UniversityCorvallisUSA
  2. 2.Department of Biological SciencesUniversity of Nevada, Las VegasLas VegasUSA

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