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Older mothers produce more successful daughters.

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.

SUBMITTER: Kroeger SB

PROVIDER: S-EPMC7060700 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature

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Older mothers produce more successful daughters.

Kroeger Svenja B SB Blumstein Daniel T DT Armitage Kenneth B KB Reid Jane M JM Martin Julien G A JGA

Proceedings of the National Academy of Sciences of the United States of America 20200218 9

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 (<i>Marmota flaviventer</i>) living in two different elevational environments to quantify age-specific reproductive success of daug ...[more]

PMID: 32071200

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Project description:Few studies to date have used the cancer diagnosis as a teachable moment to promote healthy behavior changes in survivors of cancer and their family members. Given the role of obesity in the primary and tertiary prevention of breast cancer, the authors explored the feasibility of a mother-daughter weight loss intervention.A randomized controlled trial of a mailed weight loss intervention was undertaken among 68 mother-daughter dyads (n = 136), each comprised of a survivor of breast cancer (AJCC stage 0-III) and her adult biological daughter. All women had body mass indices ? 25 kg/m(2) and underwent in-person assessments at baseline, 6 months, and 12 months, with accelerometry and exercise capacity performed on a subset of individuals. All women received a personalized workbook and 6 newsletters over a 1-year period that promoted weight loss; exercise; and a nutrient-rich, low-energy density diet. A total of 25 dyads received individually tailored instruction (individual), 25 dyads received team-tailored instruction (TEAM), and 18 dyads received standardized brochures (control).The trial met its accrual target, experienced 90% retention, and caused no serious adverse events. Significant differences in baseline to 12-month changes were observed between individual versus control mothers for body mass index, weight, and waist circumference (WC); significant differences also were observed in the WC of corresponding daughters (P <?.05). Significant differences were found between individual versus control and team versus control dyads for WC (P =?.0002 and .018, respectively), minutes per week of physical activity (P =?.031 and .036, respectively), and exercise capacity (P =?.047 for both).Significant improvements in lifestyle behaviors and health outcomes are possible with tailored print interventions directed toward survivors of cancer and their family members. For greater impact, more research is needed to expand this work beyond the mother-daughter dyad.

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Older mothers produce more successful daughters.

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Older mothers produce more successful daughters.

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