Influence of Early Reproductive Success on Longevity and Late Reproductive Success in an Alpine Ungulate

The American Naturalist
Andrea PanagakisSteeve D Côté

Abstract

The life-history theories of aging predict lifetime trade-offs between early reproductive allocation and late-life survival, reproduction, or both components of fitness. Recent studies in wild populations have found evidence for these early-late life trade-offs, but rarely have they been found across multiple traits while exploring the additional effects of variation in environmental conditions and individual quality. Benefiting from longitudinal data on adult female mountain goats (Oreamnos americanus), we investigated the influence of age at first reproduction (AFR) and early reproductive success (ERS) on longevity, late reproductive success, and senescence rates while accounting for the influence of natal environmental conditions and individual quality. Contrary to predictions, we did not find evidence for early-late life trade-offs. Instead, an earlier AFR and a greater ERS had positive but weak direct effects on late reproductive success. Natal population density, however, was the strongest determinant of all life-history traits, having a direct negative effect on female longevity, late reproductive success, AFR, and ERS. Although natal density reduced the probability of annual reproduction and annual survival during adult...Continue Reading

Citations

Jun 14, 2017·American Journal of Primatology·Morgane TidièreJean-Michel Gaillard
Sep 1, 2018·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·Samuli Helle
Jan 13, 2018·Proceedings. Biological Sciences·Gabriel Pigeon, Fanie Pelletier
Nov 25, 2018·Oecologia·L CheynelJ-F Lemaître
Feb 13, 2019·The Journal of Animal Ecology·Emily M Tompkins, David J Anderson
May 23, 2020·Science·Noah Snyder-MacklerJenny Tung
Jan 2, 2019·Ecology and Evolution·Svenja B KroegerJulien G A Martin
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Jun 8, 2021·Frontiers in Cell and Developmental Biology·Gabriel PigeonFanie Pelletier

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