Population dynamics ofLuehdorfia japonica Leech (Lepidoptera: Papilionidae)

II. Patterns of mortality in immatures in relation to egg cluster size
  • Kazuma Matsumoto


Mortality processes from egg to final instar larval stage are examined in the papilionid butterflyLuehdorfia japonica for two generations in a natural populations. Special attention is given to the effects of initial egg cluster size on the survival rate by the 3rd instar. Mean egg cluster sizes for the two generations were 11.3 and 10.7. The hatching rate was not affected by the egg cluster size. Up to 3rd instar, larvae in a group were more likely to dieen masse rather than to die individually, whereas most larvae in later instars died independently. The egg clusters of the average (and the most frequent) size class (11±1) had the second highest survival rate until the 3rd instar. A slightly higher survival rate occurred in clusters a little larger (14±1). The average size clusters were least likely to be exterminated and about 70% of them produced at least one individual surviving to the 3rd instar. Factors affecting the observed mortality patterns were discussed.


Average Size Cluster Mortality Process Host Plant Density Contagious Distribution Wild Ginger 
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Copyright information

© Society of Population Ecology 1990

Authors and Affiliations

  • Kazuma Matsumoto
    • 1
  1. 1.Tama Forest Science GardenForestry and Forest Products Research InstituteTokyoJapan

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