1st Honeybee behaviour revision post: bee jobs

This is a revision post for the BBKA Module 6 Honeybee Behaviour exam. I’m trying to work my way through the syllabus, one section at a time. Starting at the beginning:

6.1 The candidate shall be able to give a detailed account of: the function and behaviour of the worker honeybee throughout its life including the types of work done, duration of work periods under normal circumstances and the variations in behaviour due to seasonal changes in the size of the colony.

First days

When a worker bee emerges, all soft and fuzzy, one of her main priorities will be eating pollen from nearby cells. The protein in pollen is important for developing her hypopharyngeal (they don’t make these names easy) & mandibular glands, which will produce brood food and royal jelly, as well as her wax glands. Between pollen eating she will help out the colony by beginning in days 1-3 with the simple tasks of cleaning the cell she emerged from and those around it (which takes hive-proud bees longer than you might imagine – about 41 minutes a cell, with about 15-30 worker bees helping out) and, if necessary, brood incubation by sitting on top of capped brood cells.

Bees hanging out on a comb.

Wave your bum in the air like you just don't care

Moving outwards

About days 4- 6 she will progress to becoming a Nurse bee, feeding young larvae with the brood food secreted from her glands and older larvae with additional honey & pollen. If it is swarm season, or the bees decide to supersede the existing queen, she may be helping raise queen larvae, which will receive large amounts of protein-rich royal jelly.

By around 10-12 days old her wax glands will have developed and she can begin wax making, along with processing honey into nectar, pollen packing and temperature control duties such as fanning in hot weather. She may also be an undertaker bee, removing dead bees and other debris from the hive. By days 16-20 her hypopharyngeal gland decreases in size and begins producing invertaze and glucose oxidase, enzymes required for honey production. Her body is getting ready to forage.

Bees on a frame of pollen.

Out and about

Our bee has progressed from spending most of her time in the centre of the brood nest to moving further out on the comb for wax building and food handling duties. She will spend days 19-21 on the edge of the nest, fanning or guarding the entrance and making longer orientation flights than previously – she has become an outside bee. Her body is now able to produce the alarm (2-heptanone) & sting (isopentyl acetate) pheromones, along with venom.

She will spend the rest of her life – about another 20 days – foraging for nectar, pollen, water and propolis. The flight distance she accumulates rather than her chronological age seems to do her in, since workers tend to die after flying a total of about 800 km, whether that distance was flown in 5 days or 30. This appears to be caused by exhaustion of the necessary glycogen reserves which accumulate in the flight muscles of young workers; older foragers are unable to produce more glycogen and die of exhaustion.

Bee on blue flower

But bees are very flexible…

Despite the rough time frames given above, the activities a bee carries out are extremely variable and flexible depending on factors such as colony population or the time of year, for example in spring as the colony expands foraged food is mainly eaten by the brood and little honey is stored. If a lot of nectar is being foraged by outside bees, house bees will be encouraged to become receivers and honey makers earlier. However, certain duties such as wax making and entrance guarding are dependent on gland development.

Despite their reputation for being ‘busy bees’ workers often spend a lot of the time resting or walking around the colony, allowing them to react quickly to emergencies or an increase in nectar/pollen flow. Resting or alternating tasks also allows their body time to recover, for example for the wax glands to produce more wax before a bee returns to comb building or for the hypopharyngeal glands and mandibular glands to produce more brood food.

Winter bees

The tasks described above are the life of a spring/summer worker bee. Autumn bees that do not raise young live longer, as the pollen they eat is not used for brood food production but instead increases their body’s fat content, which helps them to live longer as they over-winter. When the temperature falls to about 18C they begin to cluster around the Queen with their heads inwards, contracting the cluster as the temperature drops. They consume honey and shiver their flight muscles in the thorax to generate heat. Once the weather warms and the queen starts to lay eggs again they will begin nursing brood and foraging.

More revision/Module 6 themed posts:

About Emily Scott

I am a UK beekeeper living in Ealing, west London. I have been keeping bees in the Ealing Beekeepers Association’s local apiary since 2008 and created this blog as a record for myself of my various beekeeping related disasters and - hopefully - future successes. Busy taking the British Beekeeping Association module exams too!
This entry was posted in Bee behaviour, Bee biology, Exams and tagged , . Bookmark the permalink.

One Response to 1st Honeybee behaviour revision post: bee jobs

  1. Pingback: BBKA module 6 honeybee behaviour: 6.1 the role of the worker bee | Miss Apis Mellifera

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s