Adaptation to developmental diet influences the response to selection on age at reproduction in the fruit fly.
Level 5 - mechanism / opinion, no new human data
Animal experimental evolution study (Level 5 by CEBM 2011 criteria).
PubMed 30735275 · doi:10.1111/jeb.13425
What was done
Researchers used experimental evolution in fruit flies (Drosophila melanogaster) to test the interaction between two selection pressures: adaptation to three different developmental diets and selection for early versus late age at reproduction.
What was found
The abstract reports no numerical values or statistics. Adaptation to increased age at reproduction increased lifespan across all diets, though the extent of lifespan increase depended on the dietary selection regime. Adaptation to a lower-calorie developmental diet resulted in faster development and decreased adult weight, but the magnitude of this response depended on the reproductive age selection regime.
Why it matters
This study shows that selective pressures experienced at different life stages interact, modulating the magnitude of life-history evolutionary responses.
Limits
No quantitative effect sizes, confidence intervals, sample sizes, or replication details are provided in the abstract. The study was conducted exclusively in a laboratory-adapted fruit fly model, limiting direct translation to natural populations or human biology.
Cited by
- supports Selecting fruit flies over generations for delayed fecundity results in extended lifespan.