Ecological Studies on Anagrus incarnatus Haliday (Hymenoptera : Mymaridae), an Egg Parasitoid of the Rice Planthoppers : I. Functional Response to Host Density and Mutual Interference

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The functional response to host density and mutual interference of an egg parasitoid, Anagrus incamatus Haliday, parasitizing eggs of Nilaparvata Zagem (Stal) were analysed. The behavioural response to varying host egg densities of this parasitoid was found to be fitted the Helling’s Type II functional response. By utilizing the Holling’s (1959) method, the handling time (Tn) and searching efficiency (a) were evaluated. This parasitoid was also found to possess some degree of mutual interference (m), follwing the Hassell and Varley’s (1969) model. In addition, ohservation on the sex ratio of the parasitoid’s progeny, with respect to the host egg and searching parasitoid densities available in the present study, showed that its ratio was rather constant, the females usually outnumbered the males, about 2 or 3 to 1.

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Details 詳細情報について

  • CRID
    1390290699661027584
  • NII Article ID
    110000017520
  • NII Book ID
    AA00247166
  • DOI
    10.5109/23794
  • HANDLE
    2324/23794
  • ISSN
    00236152
  • Text Lang
    en
  • Article Type
    departmental bulletin paper
  • Data Source
    • JaLC
    • IRDB
    • Crossref
    • CiNii Articles
    • OpenAIRE

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