Maternal longevity and offspring sex in wild ungulates.
cost of reproduction
disposable soma
lifespan
mammals
sex ratio
trade-offs
Journal
Proceedings. Biological sciences
ISSN: 1471-2954
Titre abrégé: Proc Biol Sci
Pays: England
ID NLM: 101245157
Informations de publication
Date de publication:
13 02 2019
13 02 2019
Historique:
entrez:
10
4
2019
pubmed:
10
4
2019
medline:
12
2
2020
Statut:
ppublish
Résumé
In species with sexual size dimorphism, the offspring of the larger sex usually have greater energy requirements and may lead to greater fitness costs for parents. The effects of offspring sex on maternal longevity, however, have only been tested in humans. Human studies produced mixed results and considerable debate mainly owing to the difficulty of distinguishing the effects of sexual dimorphism from sociocultural factors. To advance this debate, we examined how the relative number of sons influenced maternal longevity in four species of free-living ungulates (Soay sheep Ovis aries; bighorn sheep, Ovis canadensis; red deer, Cervus elaphus; mountain goat, Oreamnos americanus), with high male-biased sexual size dimorphism but without complicating sociocultural variables. We found no evidence for a higher cumulative cost of sons than of daughters on maternal longevity. For a given number of offspring, most females with many sons in all four populations lived longer than females with few sons. The higher cost of sons over daughters on maternal lifespan reported by some human studies may be the exception rather than the rule in long-lived iteroparous species.
Identifiants
pubmed: 30963926
doi: 10.1098/rspb.2018.1968
pmc: PMC6408606
doi:
Banques de données
Dryad
['10.5061/dryad.p0544hn']
figshare
['10.6084/m9.figshare.c.4372853']
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
20181968Références
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