Abstract:
:Annual reproductive success and senescence patterns vary substantially among individuals in the wild. However, it is still seldom considered that senescence may not only affect an individual but also affect age-specific reproductive success in its offspring, generating transgenerational reproductive senescence. We used long-term data from wild yellow-bellied marmots (Marmota flaviventer) living in two different elevational environments to quantify age-specific reproductive success of daughters born to mothers differing in age. Contrary to prediction, daughters born to older mothers had greater annual reproductive success on average than daughters born to younger mothers, and this translated into greater lifetime reproductive success. However, in the favorable lower elevation environment, daughters born to older mothers also had greater age-specific decreases in annual reproductive success. In the harsher higher elevation environment on the other hand, daughters born to older mothers tended to die before reaching ages at which such senescent decreases could be observed. Our study highlights the importance of incorporating environment-specific transgenerational parent age effects on adult offspring age-specific life-history traits to fully understand the substantial variation observed in senescence patterns in wild populations.
journal_name
Proc Natl Acad Sci U S Aauthors
Kroeger SB,Blumstein DT,Armitage KB,Reid JM,Martin JGAdoi
10.1073/pnas.1908551117subject
Has Abstractpub_date
2020-03-03 00:00:00pages
4809-4814issue
9eissn
0027-8424issn
1091-6490pii
1908551117journal_volume
117pub_type
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