Sex-specific patterns of senescence in artificial insect populations varying in sex-ratio to manipulate reproductive effort
| Autor: | Thierry Rigaud, Yannick Moret, Charly Jehan, Manon Chogne |
|---|---|
| Přispěvatelé: | Biogéosciences [UMR 6282] [Dijon] (BGS), Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Study was funded by the CNRS., ANR-14-CE02-0009,MATER-IMMUNITY,Transfert maternel d'immunité chez les insectes: caractérisation fonctionnelle et évolution(2014) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Male Aging Evolution media_common.quotation_subject Zoology Biology Evolution of ageing 010603 evolutionary biology 01 natural sciences Competition (biology) 03 medical and health sciences Sexual Behavior Animal QH359-425 Animals Sex Ratio Mating Ecology Evolution Behavior and Systematics media_common Tenebrio molitor Cost of reproduction Reproductive success Immuno-senescence Reproduction Longevity Immunity Sexual dimorphism Coleoptera Ageing 030104 developmental biology Fertility Disposable soma theory Linear Models Female [SDE.BE]Environmental Sciences/Biodiversity and Ecology Sex ratio Research Article |
| Zdroj: | BMC Evolutionary Biology, Vol 20, Iss 1, Pp 1-13 (2020) BMC Evolutionary Biology BMC Evolutionary Biology, BioMed Central, 2020, 20 (1), pp.18. ⟨10.1186/s12862-020-1586-x⟩ |
| ISSN: | 1471-2148 |
| DOI: | 10.1186/s12862-020-1586-x⟩ |
| Popis: | Background The disposable soma theory of ageing assumes that organisms optimally trade-off limited resources between reproduction and longevity to maximize fitness. Early reproduction should especially trade-off against late reproduction and longevity because of reduced investment into somatic protection, including immunity. Moreover, as optimal reproductive strategies of males and females differ, sexually dimorphic patterns of senescence may evolve. In particular, as males gain fitness through mating success, sexual competition should be a major factor accelerating male senescence. In a single experiment, we examined these possibilities by establishing artificial populations of the mealworm beetle, Tenebrio molitor, in which we manipulated the sex-ratio to generate variable levels of investment into reproductive effort and sexual competition in males and females. Results As predicted, variation in sex-ratio affected male and female reproductive efforts, with contrasted sex-specific trade-offs between lifetime reproduction, survival and immunity. High effort of reproduction accelerated mortality in females, without affecting immunity, but high early reproductive success was observed only in balanced sex-ratio condition. Male reproduction was costly on longevity and immunity, mainly because of their investment into copulations rather than in sexual competition. Conclusions Our results suggest that T. molitor males, like females, maximize fitness through enhanced longevity, partly explaining their comparable longevity. |
| Databáze: | OpenAIRE |
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