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Trade-off in resource allocation

Research Project

Project/Area Number 12640606
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 生態
Research InstitutionTohoku University

Principal Investigator

SAKAI Satoko  Graduate School of Life Sciences, Associate Professor, 大学院・生命科学研究科, 助教授 (90272004)

Co-Investigator(Kenkyū-buntansha) HAKOYAMA Yuko  Tohoku University, Graduate School of Life Sciences, Research Associate, 大学院・生命科学研究科, 助手 (80312544)
SAKAI Koki  Tohoku University, Graduate School of Life Sciences, Associate Professor, 大学院・生命科学研究科, 助教授 (10272006)
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2001: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 2000: ¥1,600,000 (Direct Cost: ¥1,600,000)
Keywordstrade-off / size / number / 資源投資 / 資源
Research Abstract

To explain the general tendency of large mothers to produce large offspring, we developed two models in which either the rate at which each single offspring extracts resources from the mother or the rate at which the mother supplies resources to all the offspring is limited (terminal- or upper-stream-limitation on resource transport, respectively). We also reanalyzed the data of Erythronium japonicum (Sakai 1998) to test the models. The terminal-stream-limitation model predicted that the optimal offspring size that maximizes the fitness of the mother increases with an increase in the maximum rate of resource extraction by each single offspring. Thus, large mothers produce large offspring if the maximum resource extraction rate is high in those mothers. The upper-stream-limitation model predicted that the optimal offspring size decreases with an increase in the maximum rate of resource supply by the mother to all the offspring. In E. japonicum, the maximum growth rate of a seed was independent of the number of seeds of a plant, suggesting that the resource extraction rate is limited at the individual seed level. The maximum growth rate was high in large plants and had a strong positive effect on final seed mass. Thus, the results were consistent with the terminal-stream-limitation model.

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] Sakai, S., Harada, Y.: "Why do, large mothers produce large offspring? : theory and a test"American Naturalist. 157. 348-359 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Sakai, S.Harada, Y.: "Sink-limitation and the size-number trade-off of organs : production of organs using a fixed amount of reserves"Evolution. 55. 467-476 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Sakai, S.: "Biased sex allocation in hermaphroditic plants"Journal of Plant Research. 113. 335-342 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Sakai, S.: "Size-number trade-off and allocation to Flower pradutoly in animal-pollinated plants"Plant Species Biology. 15. 261-268 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Ishii, HS, Sakai, S.: "Optional timing of flower abortiohi experimental study on E. japonicum"Functional Ecology. 14. 122-128 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Hikosaka, K.Nagashima, H., Harada, Y., Hirose, T.: "A simple formulation of interaction between individuals company for light in rnonospecitic stand"Functional Ecology. 15. 642-646 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Sakai, S., and Harada, Y.: "Whe do large mothers produce large offspring? : theory and a test"American Naturalist. 157. 348-359 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Sakai, S., and Harada: "Y. Sink-limitation and the size-number trade-off of organs : production of organs using a fixed amount of reserves"Evolution. 55. 467-476 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Sakai, S.: "Biased sex allocation in hermaphroditic Plants"Journal of Plant Research. 113. 335-342 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Sakai, S.: "Size-number trade-off and allocation to flower production in animal pollinated plants"Plant Species Biology. 15. 261-268 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Ishii, H. S., & Sakai, S.: "Optimal timing of flower abortion ; experimental study on Erythronium japoncum"Functional Ecology. 14. 122-128 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Hikosaka, K., Nagashima, Harada, Y., and Hirose, T.: "A simple formulation of interaction between individuals competing for light in a monospecific stand"H., Functional Ecology. 15. 642-646 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Ishii, HS., Sakai, S.: "Implications of geitonogamous pollination for flurgl longevity"Functional Ecology. 15. 633-641 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Ishii HS., Sakai, S.: "Effects of Floral display site and floral positions on individual floral longevities of Northecivm asiaticom"functional Ecology. 15. 396-405 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Sakai, S., Harada, Y.: "Why do large mothers produce large offspring? theory and atest"American Naturalist. 157. 348-359 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Sakai, S., Harada, Y.: "Sink limitation and size-number-trade-off of organs"Evolution. 55. 467-476 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Sakai,S.and Harada,Y.: "Sink-limitation and size-number trade-off of organs : production of organs using a fixed amount of reserves"Evolution. 55・3(印刷中). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Sakai,S and Harada Y,: "Why do large mothers produce large offspring? : theory and a test."American Naturalist. 157・3(印刷中). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Sakai,S: "Size-number trade-off and allocation to flower production in animal pollinated plants."Plant Species Biology. 15. 261-268 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Hikosaka,K.and Hirose,T.: "Photosynthetic nitrogen-use efficiency in species coexisting in a warm-temperate evergreen forest"Tree Physiology. 20. 1249-1254 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Hikosaka,K.and Hirose,T.: "Nitrogen uptake and use of competing individuals in a Xanthium canadense stand"Oecol : gia. 126. 174-181 (2001)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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