Quail Bred to Reproduce More Aged Faster, Supporting a Core Theory of Aging
Graded Preliminary — artificial selection experiment in Japanese quail over six generations, yet an animal model with no evidence in people.
Animal study. Findings may not carry over to people, which is why the grade is capped at Preliminary.
Researchers selectively bred Japanese quail for higher or lower reproductive effort across several generations. By generations five and six, the high-reproduction birds died sooner. The lifespan difference came from faster aging rates, not from being more fragile to begin with. This is some of the cleanest experimental evidence in vertebrates that investing more in reproduction comes at a real cost to longevity.
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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