NDLI: One clutch or two clutches? Fitness correlates of coexisting alternative female life-histories in the European earwig

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One clutch or two clutches? Fitness correlates of coexisting alternative female life-histories in the European earwig

Content Provider	Springer Nature Link
Author	Meunier, Joël Wong, Janine W. Y. Gómez, Yamenah Kuttler, Sabine Röllin, Lilian Stucki, Dimitri Kölliker, Mathias
Copyright Year	2011
Abstract	Whether to reproduce once or multiple times (semelparity vs. iteroparity) is a major life-history decision that organisms have to take. Mode of parity is usually considered a species characteristic. However, recent models suggested that population properties or condition-dependent fitness payoffs could help to maintain both life-history tactics within populations. In arthropods, semelparity was also hypothesised to be a critical pre-adaptation for the evolution of maternal care, semelparous females being predicted to provide more care due to the absence of costs on future reproduction. The aim of this study was to characterize potential fitness payoffs and levels of maternal care in semel- and itero-parous females of the European earwig Forficula auricularia. Based on 15 traits measured in 494 females and their nymphs, our results revealed that iteroparous females laid their first clutch earlier, had more eggs in their first clutch, gained more weight during the 2 weeks following hatching of the first clutch, but produced eggs that developed more slowly than semelparous females. Among iteroparous females, the sizes of first and second clutches were significantly and positively correlated, indicating no investment trade-off between reproductive events. Iteroparous females also provided more food than semelparous ones, a result contrasting with predictions that iteroparity is incompatible with the evolution of maternal care. Finally, a controlled breeding experiment reported full mating compatibility among offspring from females of the two modes of parity, confirming that both types of females belong to one single species. Overall, these results indicate that alternative modes of parity represent coexisting life-history tactics that are likely to be condition-dependent and associated with offspring development and specific levels of maternal care in earwigs.
Starting Page	669
Ending Page	682
Page Count	14
File Format	PDF
ISSN	02697653
Journal	Evolutionary Ecology
Volume Number	26
Issue Number	3
e-ISSN	15738477
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-08-03
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Semelparity Iteroparity Alternative reproductive tactics Coexistence Parental care Forficula auricularia Evolutionary Biology Human Genetics Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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One clutch or two clutches? Fitness correlates of coexisting alternative female life-histories in the European earwig

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