Factors determining the northern limit of the distribution of Monochamus alternatus: does the low temperature of summer nights prevent the beetles from becoming mature?

2014 Fiscal Year Final Research Report

• Project/Area Number: 24658143
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Forest science
• Research Institution: Forestry and Forest Products Research Institute
• Principal Investigator: MAEHARA Noritoshi 独立行政法人森林総合研究所, 東北支所, 主任研究員 (20343808)
• Co-Investigator(Kenkyū-buntansha): NAKAMURA Katsunori 独立行政法人森林総合研究所, 東北支所, グループ長 (40343785)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 昆虫 / 分布 / マツノマダラカミキリ / 性成熟

Outline of Final Research Achievements

The effect of temperature on ovary development of Monochamus alternatus was examined in the laboratory to verify the hypothesis that "the low temperature of summer nights affects the ovary development of this beetle and determines the northern limit of its distribution". Twenty-five ℃ in the daytime and 15 ℃ at night did not affect ovary development. On the other hand, 25 ℃ in the daytime and 10 ℃ at night delayed ovary development and decreased the number of mature eggs of the beetles. However, the effect of the low temperature of summer nights on ovary development could not explain the northern limit of the beetle's distribution alone because some eggs became mature.

Free Research Field

森林微生物生態学