Ecological and evolutionary significance of conspecific sperm precedence

• Project/Area Number: 26840137
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Ecology/Environment
• Research Institution: Rissho University
• Principal Investigator: Suzuki Noriyuki 立正大学, 環境科学研究所, 客員研究員 (00724965)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: 繁殖干渉 / 種分化 / 生殖隔離 / ニッチ分割 / 多回交尾

Outline of Final Research Achievements

This study examined the effects of conspecific sperm precedence on species coexistence between closely related mating signals. I used generalist and specialist Harmon ladybirds for the mating experiments. Based on the results of the experiments, I developed the mathematical model to predict the population dynamics of the two species. I showed that the two species cannot coexist in the same niche despite the mechanism of conspecific sperm precedence. This study illustrates the underestimated significance of conspecific sperm precedence.

Research Products

• [Journal Article] Reproductive interference and niche partitioning in aphidophagous insects (2016)
  • Author(s): Suzuki Noriyuki & Naoya Osawa
  • Journal Title: Psyche Volume: 4751280 Pages: 4751280-4751280
  • DOI: 10.1155/2016/4751280
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Variation of clutch size and trophic egg proportion in a ladybird with and without male-killing bacterial infection. (2016)
  • Author(s): Suzuki, N., Suzuki-Ohno, Y., Takakura, K.
  • Journal Title: Evolutionary Ecology Volume: 30 Issue: 6 Pages: 1081-1095
  • DOI: 10.1007/s10682-016-9861-4
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] テントウムシにおける栄養卵のメカニズムと機能 (2016)
  • Author(s): 鈴木紀之, 大澤直哉
  • Journal Title: 昆虫と自然 Volume: 51 Pages: 4-8
• [Journal Article] Host selection in insects: reproductive interference shapes behavior of ovipositing females (2015)
  • Author(s): Suzuki Noriyuki
  • Journal Title: Population Ecology Volume: 57 Issue: 2 Pages: 293-305
  • DOI: 10.1007/s10144-015-0491-4
  • Peer Reviewed
• [Journal Article] Size-related non-random mating in a natural population of the ladybird beetle Harmonia axyridis (Coleoptera: Coccinellidae) (2015)
  • Author(s): Naoya Osawa, Narihiro Kagami, Suzuki Noriyuki & Nobuko Tuno
  • Journal Title: Acta Societatis Zoologicae Bohemicae Volume: 79 Pages: 113-119
  • Peer Reviewed
• [Journal Article] Male killer prevalence of the two sibling ladybird beetles Harmonia yedoensis and H. axyridis (Coleoptera: Coccinellidae) in the sympatric population (2014)
  • Author(s): Noriyuki Suzuki, Kameda Yuichi, Osawa Naoya
  • Journal Title: European Journal of Entomology Volume: 111 Issue: 2 Pages: 307-311
  • DOI: 10.14411/eje.2014.029
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Conspecific sperm precedence does not work as a barrier against reproductive interference (2016)
  • Author(s): Suzuki Noriyuki
  • Organizer: The 25th International Congress on Entomology
  • Place of Presentation: フロリダ・オーランド
  • Year and Date: 2016-09-01
  • Int'l Joint Research
• [Remarks] 進化・保全生態学研究室（立正大学）
  • URL: http://fvgnoriyuki.url.ph/home/