2016 Fiscal Year Final Research Report
Evolutionary study on differences of dopamine regulation systems in the brain between sexes in social Hymenoptera
| Project/Area Number |
26440181
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Animal physiology/Animal behavior
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| Research Institution | Tamagawa University |
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Principal Investigator |
Sasaki Ken 玉川大学, 農学部, 准教授 (40387353)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | biogenic amine / bumble bee / dopamine / honey bee / reproduction |
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| Outline of Final Research Achievements |
To clarify dopamine regulation systems in the brains in eusocial bees, dopamine dynamics and factors affecting the levels in the honey bee and the bumble bee were determined. In the honey bee, dopamine has a role in promotion of reproduction in both workers and males. Factors affecting increase of brain dopamine were a presence of a queen (or queen substances) and tyrosine (a precursor of dopamine) supply in workers, and juvenile hormone and tyrosine supply in males. In the bumble bee, a positive correlation between ovarian development and brain dopamine levels was detected in queenless workers, but not in virgin queens with developed ovaries. Thus, the differences of dopamine regulation systems between sexes were found in the honey bee, and roles of dopamine differ between the castes in both species.
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| Free Research Field |
昆虫生理学
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