| Budget Amount *help |
¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2016: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2015: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
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| Outline of Final Research Achievements |
Walking behavior of a model beetle, the red flour beetle, Tribolium castaneum, has been artificially selected for over 20 genertaoions. The strains selected for longer (WL) and shorter walking (WS) ability have been established. WL strains had higher mating success than WS strains only in males but WS strains had lowewr attack rates from predator than WL strains. The investigation of sexual traits showed that WS strains males had higher sperm competition ability than WL males, indicating these have different strategies for pre-mating and post-mating in the two strains. Also, the two strains had different shape in their gential organs, suggesting reproductive isolation concering for dispersal ability by walking in insects.
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