ArticleBMC evolutionary biology2017
Group demography affects ant colony performance and individual speed of queen and worker aging.
Article in BMC evolutionary biology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 20 citations in OpenAlex.
- Age polyethism can emerge from social learning: A game-theoretic investigation.PLoS computational biology · 2025Article
- Histone acetyltransferases and external demands influence task switching inBiology letters · 2023Article
- Individual experience influences reconstruction of division of labour under colony disturbance in a queenless ant species.Frontiers in zoology · 2022Article
- Article
- Extreme lifespan extension in tapeworm-infected ant workers.Royal Society open science · 2021Article
- The plasticity of lifespan in social insects.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2021Review
- Methuselah's daughters: Paternal age has little effect on offspring number and quality inEcology and evolution · 2018Article
- Vitellogenin-like A-associated shifts in social cue responsiveness regulate behavioral task specialization in an ant.PLoS biology · 2018Article
- Age-based soldier polyethism: old termite soldiers take more risks than young soldiers.Biology letters · 2018Article
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe performance and fitness of social societies mainly depends on the efficiency of interactions between reproductive individuals and helpers. Helpers need to react to the group's requirements and to adjust their tasks accordingly, while the reproductive individual has to adjust its reproductive rate. Social insects provide a good system to study the interrelations between individual and group characteristics. In general, sterile workers focus on brood care and foraging while the queen lays eggs. Reproductive division of labor is determined by caste and not interchangeable as, e.g., in social mammals or birds. Hence, changing social and environmental conditions require a flexible response by each caste. In the ant Cardiocondyla obscurior, worker task allocation is based on age polyethism, with young workers focusing on brood care and old workers on foraging. Here, we examine how group age demography affects colony performance and fitness in colonies consisting of only old or young workers and a single old or young queen. We hypothesized that both groups will be fully functional, but that the forced task shift affects the individuals' performance. Moreover, we expected reduced worker longevity in groups with only young workers due to precocious foraging but no effect on queen longevity depending on group composition.
resultsNeither the performance of queens nor that of workers declined strongly with time per se, but offspring number and weight were influenced by queen age and the interaction between queen and worker age. Individual residual life expectancy strongly depended on colony demography instead of physiological age. While worker age affected queen longevity only slightly, exposing old workers to the conditions of colony founding increased their life spans by up to 50% relative to workers that had emerged shortly before colony set-up.
conclusionsThe social environment strongly affected the tempo of aging and senescence in C. obscurior, highlighting the plasticity of life expectancy in social insects. Furthermore, colonies obtained the highest reproductive output when consisting of same-aged queens and workers independent of their physiological age. However, workers appeared to be able to adjust their behavior to the colony's needs and not to suffer from age-dependent restrictions.
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