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Diet, sex, and death in field crickets
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal Ecology.
2012 (English)In: Ecology and Evolution, ISSN 2045-7758, Vol. 2, no 7, 1627-1636 p.Article in journal (Refereed) Published
Abstract [en]

Senescence is shaped by age-dependent trade-offs between fitness components. Because males and females invest different resources in reproduction, the trade-offs behind age-dependent reproductive effort should be resolved differently in the sexes. In this study, we assess the effects of diet (high carbohydrate and low protein vs. equal carbohydrate and protein) and mating (once mated vs. virgin) on lifespan and age-dependent mortality in male and female field crickets (Teleogryllus commodus), and on male calling effort. Females always had higher actuarial ageing rates than males, and we found a clear lifespan cost of mating in females. Mated males, however, lived longer than virgin males, possibly because virgins call more than mated males. The fastest age-dependent increases in mortality were among mated males on the high-carbohydrate diet. Males on a high-carbohydrate diet showed a faster increase in calling effort earlier in life, and a more pronounced pattern of senescence once they reached this peak than did males on a diet with equal amounts of protein and carbohydrates. Our results provide evidence that the cost of mating in this cricket species is both diet and sex-dependent, and that the underlying causes of sex differences in life-history traits such as lifespan and senescence can be complex.

Place, publisher, year, edition, pages
2012. Vol. 2, no 7, 1627-1636 p.
Keyword [en]
Ageing, calling effort, Gompertz, senescence, sex differences, Teleogryllus commodus
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-192088DOI: 10.1002/ece3.288ISI: 000312448400025OAI: oai:DiVA.org:uu-192088DiVA: diva2:588899
Available from: 2013-01-16 Created: 2013-01-16 Last updated: 2013-01-16Bibliographically approved

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Zajitschek, Felix
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Animal Ecology
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