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Classic predictions about sex change do not hold under all types of size advantage
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal Ecology.
2010 (English)In: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 23, no 11, 2432-2441 p.Article in journal (Refereed) Published
Abstract [en]

Theory predicts that the 'size advantage' (rate of increase in male and female fitness with age or size) determines the direction and the timing of sex change in sequential hermaphrodites. Whereas the size advantage is generated by the mating system and would be expected to vary within and between species, the shape or form of the size advantage has rarely been estimated directly. Here, we ask whether theoretical predictions about the timing of sex change hold under different types of size advantage. We model two biological scenarios representing different processes generating the size advantage and find that different types of size advantage can produce patterns that qualitatively differ from classic predictions. Our results demonstrate that a good understanding of sequentially hermaphroditic mating systems, and specifically, a direct assessment of the processes underlying the size advantage is crucial to reliably predict and explain within-species patterns of the timing of sex change.

Place, publisher, year, edition, pages
2010. Vol. 23, no 11, 2432-2441 p.
Keyword [en]
evolutionarily stable strategy, game theory, life history evolution, models, reproductive strategies, sequential hermaphroditism, sex allocation
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-133733DOI: 10.1111/j.1420-9101.2010.02108.xISI: 000283374200016OAI: oai:DiVA.org:uu-133733DiVA: diva2:370829
Available from: 2010-11-18 Created: 2010-11-15 Last updated: 2010-11-18Bibliographically approved

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