Researches on Population Ecology

, Volume 15, Issue 1, pp 148–162 | Cite as

A model of plant-to-plant movement of aphids III. Studies of actual movement and apparent movement by simulation technique

  • Masae Shiyomi


The plant-to-plant movement of aphids was investigated by the simulation technique in this report. Trials satisfying the following conditions are repeated and the results are compared withShiyomi's model (1967).
  1. (i)

    An arbitrary individual moves at any moment.

  2. (ii)

    The individual moves straightly forward an arbitrary direction and climbs up the plant that he first encounters with.

  3. (iii)

    There is no concentrative birth and death.

Some of the results are as follows:
  1. (i)

    For an ideal state of movement, an equation describing the relationship between the frequency of actual movement and the degree of changes in the spatial distribution by movement was obtained.

  2. (ii)

    The actual movements, whose frequency we cannot count, changes the spatial distribution of insects, and this change can be evaluated by the changes of values of the parameters contained inShiyomi's model. Using the statement (i), we can also estimate the frequency of movements of aphids in the ideal (extreme) state.



Spatial Distribution Frequency Distribution Actual Movement Simulation Technique Apparent Movement 
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Copyright information

© The Society of Population Ecology 1974

Authors and Affiliations

  • Masae Shiyomi
    • 1
  1. 1.National Institute of Agricultural SciencesTokyoJapan

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