A General Model of Comparative Fecundity for Semelparous and Iteroparous Life Histories

  title={A General Model of Comparative Fecundity for Semelparous and Iteroparous Life Histories},
  author={Truman P. Young},
  journal={The American Naturalist},
  pages={27 - 36}
  • T. Young
  • Published 1 July 1981
  • Environmental Science
  • The American Naturalist
Previous models of semelparity and iteroparity are critically reviewed. A general model is produced which incorporates population growth rate, juvenile and adult survivorship, prereproductive development time (PDT), time between reproductive episodes (TBR), and senescence. Increasing values of population growth rate and juvenile survivorship favor semelparity. Increasing values of adult survivorship, age of senescence, and the ratio of PDT to TBR favor iteroparity. Ambiguities arise when… 
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