title: Ant workers die young and colonies collapse when fed a high-protein diet.
abstract: A key determinant of the relationship between diet and longevity is the balance of protein and carbohydrate in the diet. Eating excess protein relative to carbohydrate shortens lifespan in solitary insects. Here, we investigated the link between high-protein diet and longevity, both at the level of individual ants and colonies in black garden ants, Lasius niger. We explored how lifespan was affected by the dietary protein-to-carbohydrate ratio and the duration of exposure to a high-protein diet. We show that (i) restriction to high-protein, low-carbohydrate diets decreased worker lifespan by up to 10-fold; (ii) reduction in lifespan on such diets was mainly due to elevated intake of protein rather than lack of carbohydrate; and (iii) only one day of exposure to a high-protein diet had dire consequences for workers and the colony, reducing population size by more than 20 per cent.
authors.affiliation: Centre de Recherches sur cognition Animale, CNRS UMR 5169, Université Paul Sabatier, 31062 Toulouse, France. dussutou@gmail.com
authors.forename: A
authors.initials: A
authors.lastname: Dussutour
authors.forename: S J
authors.initials: SJ
authors.lastname: Simpson
mesh_terms: D000824:Animal Nutritional Physiological Phenomena / Q000502:physiology*; D000818:Animals; D001000:Ants / Q000502:physiology*; D050528:Diet, Carbohydrate-Restricted; D004044:Dietary Proteins / Q000009:adverse effects*; D004435:Eating / Q000502:physiology; D008136:Longevity / Q000502:physiology*; D011157:Population Dynamics; D012044:Regression Analysis; D018709:Statistics, Nonparametric; D016019:Survival Analysis
chemical_list: D004044:Dietary Proteins