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  "description": "The age-related division of labour. Critical to colony survival and performance, disrupted every time you perform a split, but amazingly flexible that most splits (eventually?) are successful. What is it, why does it occur, and what happens when it is disturbed?",
  "path": "/temporal-polyethism/",
  "publishedAt": "2026-02-06T17:00:52.000Z",
  "site": "https://theapiarist.org",
  "tags": [
    "_Ceratina_",
    "carpenter bee",
    "Subscribe now"
  ],
  "textContent": "A female solitary bee, such as _Ceratina_ _flavipes_ (a carpenter bee), leads a busy life. She builds the nest, lays eggs, feeds the developing larvae, provisions the nest with stored pollen, defends it against parasitic wasps, and seals it securely for overwintering.\n\nBut, if you experimentally force two _C. flavipes_ females to _share_ a nest, they spontaneously divide the workload. One lays the eggs and guards the nest, and the other becomes non-reproductive and does the foraging.\n\nA similar separation of roles is seen when ant queens are forced to share the same nest; one lays eggs, and the other does the next excavation.\n\nThese are examples of a reproductive _division of labour_. It doesn't evolve. Instead, it happens immediately. It is an innate feature of sociality.\n\nSome readers may be familiar with this; if you mow the lawn, you probably don't also do the ironing. That's not a _reproductive_ example (obviously!), but it _is_ a division of labour.\n\nIt is thought that natural variation between the individual carpenter bees (or ants) accounts for this division of labour; one is more 'reproductive', the other more adapted for foraging.\n\nHoney bees exhibit a similar reproductive division of labour; the queen lays the eggs, and the workers … do the work.\n\nBut there's a lot more work to do in a honey bee nest containing 30,000 workers, 10–20 kg of stores and pollen, thousands of developing larvae and pupae, and consisting of an architecturally complex 3D structure.\n\nThey achieve this by exhibiting an _additional_ division of labour, an age-related one. Individual workers belong to one or more _temporal_ or _behavioural_ castes — nurses, guards, foragers — and these vary, both over time and between bees.\n\nScientists term this age-related division of labour _'temporal polyethism'_ {{1}}.\n\nIt is essential for colony survival, but it is something that is disrupted during natural processes like swarming, or unnatural events like a Pagden artificial swarm, or populating mini-nucs.\n\nOr, in fact, most major hive manipulations.\n\nWhat accounts for temporal polyethism, how is it maintained, and how is it restored after these natural and unnatural events?\n\nSponsors get more … posts, news, and information on the science, art, and practice of sustainable beekeeping. They also have access to over a decade of legacy posts, and ensure __The Apiarist__ continues to appear every week.\n\nSign up as a sponsor\n\nFinally, is it relevant to practical beekeeping, or can we just safely (but gratefully) ignore it?\n\nWe _can_ ignore it, but perhaps we shouldn't.\n\n### This post is for subscribers only\n\nBecome a member to get access to all content\n\nSubscribe now",
  "title": "Temporal polyethism",
  "updatedAt": "2026-02-06T17:00:52.000Z"
}