Quail Bred to Invest More in Offspring Age Faster and Die Sooner
Graded Preliminary — a controlled breeding experiment over six generations, but in quail; whether the findings carry over to people is unknown.
Animal study. Findings may not carry over to people, which is why the grade is capped at Preliminary.
- Design
- Animal study
- Participants
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- Duration
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- Funding
- Swiss National Science Foundation; EU Horizon 2020 Marie Skłodowska-Curie…
Quail bred for higher reproductive effort lived shorter lives because their risk of dying rose faster with age.
A core idea in aging research says that energy spent on reproduction is energy not spent on keeping the body in repair. Earlier observational studies gave mixed answers. An experiment in Japanese quail now backs the idea: birds bred for higher reproductive effort lived shorter lives.
The researchers bred two lines of quail. In one, they kept selecting birds that put a lot of effort into reproduction. In the other, they selected birds that put in little. By the fifth and sixth generations, adult survival differed between the lines. The high-effort birds did not simply die more often from the start. Instead, their risk of dying climbed faster as they got older. How much their reproduction declined with age showed no difference between the lines.
The results point to a pace of aging that can shift within a few generations in a vertebrate. The work was done in captive-bred birds, though. What it means for people cannot be read from this study.
Disclaimer: Research summaries are provided for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.
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