1989 Fiscal Year Final Research Report Summary
Mathematical Researches on Population Dynamics with Reproductive Strategy
| Project/Area Number |
62540502
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
生態学
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| Research Institution | 佐賀医科大学 |
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Principal Investigator |
YAMAMURA Norio Saga Medical Sch., Dept.of Med. Associ. Prof., 医学部, 助教授 (70124815)
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| Project Period (FY) |
1987 – 1989
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| Keywords | Mathematical Ecology / Evolutionarily Stable Strategy / Postcopulatory Guarding / Host-Parasitoid Model / Infanticide / Autogeny / Dormancy & Dispersal |
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| Research Abstract |
The following is the list of my publications or talks, which resulted from research for the last three years.
1. The postcopulatory guarding model where the mating period is finite (with N. Tsuji) A model where no females come into a patch was investigated; it was then compared with the previously researched stationary model (published in Theoretical Population Biology).
2. Host-parasitoid interaction with host-feeding (with E. Yano) Investigations were into the ratio between host-feeding and intrahost-ovipositing, the two ways of host usage found among insect parasitoids, and into the stationary numbers of hosts and parasitoids (published in Researched on Population Ecology).
3. Why do not mothers resist infanticide by males? (with T. Hasegawa and Y. Ito) It was investigated with a population genetics model with a focus on conditions under which the traits of infanticide-resistant mothers may evolve (to be published in Evolution).
4. The evolution of autogenous mosquitoes (with N. Tsuji and T. Okazawa) Evolutionary conditions from anautogeny to autogeny were investigated in terms of the intrinsic rate of natural increase. Host searching time, preimaginal period quality, and survival rate during blood-feeding turned out to be important parameters in this model (to be published in Journal of Medical Entomology; an earlier version appeared in Acta Eruditiorum of Saga Medical School).
5. Dormancy and dispersion in insects (with N. Tsuji) On the assumption of heterogeneous patches in a space, comparisons were made between constant strategy, density-dependent strategy, and patch quality-dependent strategy. Which strategy would be the strongest in a fluctuating environment was then discussed (to be read at The 5-th International Congress of Ecology).
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