| Budget Amount *help |
¥19,890,000 (Direct Cost: ¥15,300,000、Indirect Cost: ¥4,590,000)
Fiscal Year 2009: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2008: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2007: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
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| Research Abstract |
The migratory locust, Locusta migratoria, displays phase polyphenism in which various morphological, physiological, biochemical and behavioral traits vary continuously in response to population density. The present study examined the transgenerational transmission of crowding stimuli by looking at morphological and behavioral traits of hatchlings. It was found that the rearing density in the parental generation affected hatchling body size of the progeny, which showed a significant correlation with a phase-dependent morphometric trait at the adult stage in the progeny generation. In the desert locust, Schistocerca gregaria, a similar phenomenon was observed with some differences. The present study has revealed that population density in both parental and progeny generations plays an important role in the control of phase-dependent morphological and behavioral traits in locusts.
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