| Project/Area Number |
07556018
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
蚕糸・昆虫利用学
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| Research Institution | Tamagawa University |
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Principal Investigator |
ONO Masato Tamagawa University, Faculty of Agriculture, Associate Professor, 農学部, 助教授 (70204253)
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| Co-Investigator(Kenkyū-buntansha) |
ASADA Shin'ichi Kanagawa Prefectural Agricultural Research Institute, Biotechnology and Bioresou, 生物資源部, 技師
NAKAMURA Jun Tamagawa University, Research Institute, Lecturer, 学術研究所, 講師 (30256002)
YOSHIDA Tadaharu Tamagawa University, Research Institute, Professor, 学術研究所, 教授 (80138601)
SASAKI Masami Tamagawa University, Faculty of Agriculture, Professor, 農学部, 教授 (40096061)
MATSUKA Mitsuo Tamagawa University, Faculty of Agriculture, Professor, 農学部, 教授 (30074339)
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| Project Period (FY) |
1995 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1997: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1996: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | Bumblebee / Bombus hypocrita / Bombus ignitus / Pollinator / Utilization of Insect Function / Rearing Method / Pollination / Conservation of Biodiversity / マルハナバチ属 / ポリネーション / 送粉昆虫 / 生態系保全 |
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| Research Abstract |
(1) Bombus hypocrita hypocrita, B.h.sapporoensis, B.ignitus were reared in captivity. These three species of Japanese bumblebees are relatively easy to rear and produce enough number of workers for pollination in Japanese greenhouse. Thus they were thought to be practically usable.
(2) To induce colony initiation, CO2 treatment method developed by Roseler (1985) for mated B.terrestris queen to lay diploid eggs was tested for Japanese Bombus species. However, when it was applied to queens of Japanese species, they sometimes laid haploid eggs even from the beginning. Therefore, we changed the number of days from mating to the treatment for the purpose of decreasing physical load of queens. Two to 4 days of pretreatment duration was found to be best for B.h.hypocrita.
(3) Cross mating experiment showed that B.terrestris male is very active in mating to the new queens of Japanese native species. Interspecific or intersubspecific copulation occurred between B.terrestris males and new queens of Japanese Bombus species belonging to the same subgenus, i.e., B.hypocrita hypocrita, B.hypocrita sapporoensis and B.ignitus. Because of these potential problems, pollination of crops with native species instead of introduced species was recommended.
(4) Buzz foraging by laboratory-reared colonies of the Japanese bumblebees to the greenhouse tomato were evaluated. Both flower-visit frequency and fruit setting rate were comparable to those of commercial B.terrestris.
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