| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
Many caddisfly larvae build cases using sand grains. In this study, I found among- and within-population variations in the material preference of the case-bearing larvae, and the both variations have high heritability. In addition, a few discrete peaks were found in the frequency distribution of the within-population variations, indicating the possibility of polymorphism. As a result of rearing experiment, it is suggested the possibility that the indirect interaction of cannibalism may be a key factor maintaining the polymorphism.
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