A criterion of life history evolution based on density dependent selection

Yoh Iwasa, Ei Teramoto

研究成果: ジャーナルへの寄稿学術誌査読

8 被引用数 (Scopus)


A criterion for the evolution of life historical pattern is derived based on the density dependent selection mechanisms. The time development of the population is analyzed mathematically by separating the time scale into two stages, relatively rapid change of population size with fixed gene frequency and slow evolutional change of the gene frequency. The result proposes that the weighted sum of the evolutional change of population sizes at all life historical stages is always positive, where the weight is given by a characteristic parameter of density dependence of survival rate or fertility at each stage. As an example, the direction of evolutional change between two types of life historical pattern, large reproduction and high mortality pattern and small reproduction and low mortality pattern, is discussed. The criterion is extended also to the time continuous model and its is shown that as a special case the condition for invasibility of a mutant gene presented by Christiansen & Fenchel (1977) can be derived. From the result, it can be generally said that the life historical stage with the strongest density regulation plays the most important role in determining the evolutional direction.

ジャーナルJournal of Theoretical Biology
出版ステータス出版済み - 6月 7 1980

!!!All Science Journal Classification (ASJC) codes

  • 統計学および確率
  • 医学(全般)
  • モデリングとシミュレーション
  • 免疫学および微生物学(全般)
  • 生化学、遺伝学、分子生物学(全般)
  • 農業および生物科学(全般)
  • 応用数学


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