Higher early life mortality with lower infant body mass in a free-ranging primate.
early life survival
free-ranging animals
infant body mass
maternal investment
primates
rhesus macaques
Journal
The Journal of animal ecology
ISSN: 1365-2656
Titre abrégé: J Anim Ecol
Pays: England
ID NLM: 0376574
Informations de publication
Date de publication:
10 2020
10 2020
Historique:
received:
03
02
2020
accepted:
04
06
2020
pubmed:
3
7
2020
medline:
13
4
2021
entrez:
3
7
2020
Statut:
ppublish
Résumé
Traits that reflect the amount of energy allocated to offspring by mothers, such as infant body mass, are predicted to have long-lasting effects on offspring fitness. In very long-lived species, such as anthropoid primates, where long-lasting and obligate parental care is required for successful recruitment of offspring, there are few studies on the fitness implications of low body mass among infants. Using body mass data collected from 253 free-ranging rhesus macaque Macaca mulatta infants on Cayo Santiago, Puerto Rico, we examined if lower infant body mass predicts lower chance of survival through to reproductive maturation (4th year of life). We also used data on inter-birth intervals and suckling behaviours to determine whether the duration of maternal care was adjusted to infant body mass. Rhesus macaque infants experienced on average 5% reduced hazard of death for an increase in body mass of 0.1 SD (~100 g) above the mean within their age-sex class. The positive association between body mass and early life survival was most pronounced in the 1st year of life. Infant body mass tended to be lower if mothers were young or old, but the link between infant body mass and early life survival remained after controlling for maternal age. This finding suggests that maternal effects on early life survival such as maternal age may act through their influence on infant body mass. Mothers of heavier infants were less likely to be delayed in subsequent reproduction, but the estimated association slightly overlapped with zero. The timing of the last week of suckling did not differ by infant body mass. Using infant body mass data that has been rarely available from free-ranging primates, our study provides comparative evidence to strengthen the existing body of literature on the fitness implications of variation in infant body mass.
Identifiants
pubmed: 32614977
doi: 10.1111/1365-2656.13291
doi:
Banques de données
figshare
['10.6084/m9.figshare.12471764']
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Pagination
2300-2310Subventions
Organisme : NIH HHS
ID : P40 OD012217
Pays : United States
Informations de copyright
© 2020 British Ecological Society.
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