| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
In order to clarify the evolutionary origin of primitively social behavior in Pompilidae, female nesting and social behaviors of Machaerothrix tsushimensis were investigated. The results of the investigations are that two females each may make and provision their own cell(s) in a composite nest (communal) and that some of the females shift their own nests with time. Moreover, genetic differentiation between individuals at two nesting sites (about 100 m apart from each other) was analyzed. The results of the analyses are that 1) females are genetically much differentiated between the nesting sites; and 2) males are not so much differentiated between them. Although males may facilitate genetic interchange between the sites, genetic similarity of individuals at a site seems to be great. There is a possibility that the formation of a kin group associated with settled life or low migratory activity concerns the evolution and maintenance of primitive sociality in this species.
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