A General Model of Comparative Fecundity for Semelparous and Iteroparous Life Histories
1981; University of Chicago Press; Volume: 118; Issue: 1 Linguagem: Inglês
10.1086/283798
ISSN1537-5323
Autores Tópico(s)Reproductive Biology and Fertility
ResumoPrevious 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 analyzing the effect of PDT or TBR depending on whether an absolute or a relative difference in fecundity is considered. The biological implications of this and other aspects of the model are discussed.
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