Within‐diet variation in rates of macronutrient consumption and reproduction does not accompany changes in lifespan in Drosophila melanogaster

摘要: Interventions such as caloric or dietary restriction extend lifespan in organisms spanning from yeast to primates. Despite its positive influence on longevity, has been found negatively affect reproduction. Many studies have reported negative correlations between and reproductive characteristics (such mating rate, fecundity, period, others). Such correlation gives the appearance of a resource‐based trade‐off these two life‐history traits. Here, we used nutritional geometry confirm previous findings flies that macronutrient balance (protein‐to‐carbohydrate ratio, P:C) impacts both reproduction, across series diets differing P:C, maximum was observed at lower P:C (1:8) than which supported highest fecundity (1:1.5). We then addressed question whether variation among Drosophila melanogasterMeigen (Diptera: Drosophilidae) fruit food intake egg production within single treatment is associated with within‐diet lifespan, might be expected under trade‐off. There no association production, longevity. noted smaller sample sizes inter‐individual variance apparent — compared diet treatments may weakened any signature Thus, conclude that, whereas ratio primary determinant reproduction neither eating less nor laying fewer eggs per se predicted lifespan. This supports view there not simple quantitative but rather represent traits qualitatively different optima.