Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1)

Producing sons reduces lifetime reproductive success of subsequent offspring in pre-industrial Finns




Julkaisun tekijätRickard IJ, Russell AF, Lummaa V

KustantajaROYAL SOC

Julkaisuvuosi2007

JournalProceedings of the Royal Society B: Biological Sciences

Tietokannassa oleva lehden nimiPROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

Lehden akronyymiP ROY SOC B-BIOL SCI

Volyymi274

Julkaisunumero1628

Aloitussivu2981

Lopetussivun numero2988

Sivujen määrä8

ISSN0962-8452

DOIhttp://dx.doi.org/10.1098/rspb.2007.1051


Tiivistelmä
Life-history theory states that reproductive events confer costs upon mothers. Many studies have shown that reproduction causes a decline in maternal condition, survival or success in subsequent reproductive events. However, little attention has been given to the prospect of reproductive costs being passed onto subsequent offspring, despite the fact that parental fitness is a function of the reproductive success of progeny. Here we use pedigree data from a pre-industrial human population to compare offspring lifehistory traits and lifetime reproductive success (LRS) according to the cost incurred by each individual's mother in the previous reproductive event. Because producing a son versus a daughter has been associated with greater maternal reproductive cost, we hypothesize that individuals born to mothers who previously produced sons will display compromised survival and/or LRS, when compared with those produced following daughters. Controlling for confounding factors such as socio-economic status and ecological conditions, we show that those offspring born after elder brothers have similar survival but lower LRS compared with those born after elder sisters. Our results demonstrate a maternal cost of reproduction manifested in reduced LRS of subsequent offspring. To our knowledge, this is the first time such a longterm intergenerational cost has been shown in a mammal species.


Last updated on 2021-24-06 at 10:46