Complex life cycle and body sizes at life-history transitions for macroparasites

Yoh Iwasa, Genki Wada

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Questions: Macroparasites often require multiple hosts. (1) What are the conditions under which a complex life cycle (using both definitive and intermediate hosts) is more advantageous than a simple life cycle (using definitive host only)? (2) What are the optimal body sizes at life-history transitions? (3) Can a complex life cycle co-exist with a simple life cycle in the same population? Mathematical method: We study the evolutionary dynamics of phenotypes that differ in their life cycles and in their body sizes (size at birth, at transition between hosts, at maturity, etc.) Key assumptions: Evolution of the life-cycle pattern is linked to the evolution of body sizes at life-history transitions. Mortality, growth rate, host finding success, and hatching success are given as functions of body size. Conclusions: (1) The results are usefully illustrated graphically. (2) Size at birth, size at transition between hosts, and size at maturity depend on the productivity and mortality of parasites within different hosts. (3) The co-existence of phenotypes with different life histories is possible if the density dependence works both in an intermediate host and in a definitive host.

Original languageEnglish
Pages (from-to)1427-1443
Number of pages17
JournalEvolutionary Ecology Research
Volume8
Issue number8
Publication statusPublished - Dec 2006

Fingerprint

Body Size
Life Cycle Stages
body size
life cycle (organisms)
life history
life cycle
definitive host
intermediate host
intermediate hosts
phenotype
Parturition
Phenotype
mortality
size at maturity
Mortality
density dependence
numerical method
coexistence
hatching
parasite

All Science Journal Classification (ASJC) codes

  • Ecology
  • Ecology, Evolution, Behavior and Systematics
  • Genetics
  • Genetics(clinical)

Cite this

Complex life cycle and body sizes at life-history transitions for macroparasites. / Iwasa, Yoh; Wada, Genki.

In: Evolutionary Ecology Research, Vol. 8, No. 8, 12.2006, p. 1427-1443.

Research output: Contribution to journalArticle

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