2. Honey bees - the most fascinating
creature of the earth
Honey bees are social insects
Lives together in large colonies
Lives in combs or nests
Mutual cooperation exists!
Developed communication – Dances!
Defence and division of labour
3. About Colony
Consists of egg, larvae and pupae (brood) and adults.
No. varies with species
Colony consists of Workers, Drones and a Queen
(polymorphism)
Each member has definite task
Can’t survive individually
Pheromone distribution and “Dances” are necessary for
survival of colony
4. Honey Comb – The House of Bees
Hexagonal cells
Made of Wax secreted by workers abdomen
Hangs vertically
Two types of cells present – Honey cells (upper) and
brood cells (lower and middle).
Honey cells stores pollen, nectar and honey
Brood cells are meant to rear the brood
7. Queen – Progenitor of Colony
Only fertile female of colony
Larger in size
Developed ovaries
Function – Egg laying
One queen for one hive – fed with Royall Jelly
They have
Broad thorax
Well developed notched mandibles
Reduced mouth parts
Small eyes, brain
9. Mate only once
Lays about 1500-2000 eggs everyday
Egg hatch out into larva, which pupate and finally develop into adults.
Worker bees feed young ones.
Queen receive more royal jelly
Life span is 5-8 yrs.
Fertility decreases with ageing
10. Special Care!
Workers give food, care and protection, prepare comb to Queen and clean
her to lay eggs.
Produces air-borne pheromones (“queen substance”) that keep the colony
functioning orderly, loyal and protective to that queen
11. Drones
Fertile male
Fertilize the virgin queen
Referred as King of the colony
They have
Short and stout body (larger than worker bees)
Large holo optic eyes
Small and pointed mandibles
Extremely short proboscis
Unspecialized mouthparts
Sting, salivary glands, wax glands, pollen sac and honey sac absent.
12. Well developed male reproductive structures present.
Reared from unfertile egg in large drone cell
Depend workers for honey
Live for 5-6 weeks
Dies after copulation
Responsible for passing colony’s gene on to next
generation.
13. Workers
Non reproductive females
Smaller in size
Specialized body for pollen and nectar collection
They possess
Long triangular head
Large and lateral compound eyes
Long proboscis
Well developed sting apparatus
Strong wings for fanning
Pollen basket
14. • Wax gland
• Powerful sting (defense)
• Honey sac (for storing and carrying nectar)
• Pharyngeal glands (for secreting royal jelly)
• Salivary glands (for chemical modification of
nectar)
15. They are also called neuters – since they don’t have mating instincts and
reproductive powers
Produced from fertile eggs laid by queen
Live in worker cell of comb
Lives for 6 weeks
Perform all brood care, hive maintenance and defense
2 groups
House bees or residents – stay in nest for domestic duties
Field bees or foragers – outdoor workers – visits fields, forests and
gardens and collect pollen, nectar, propolis and gum
16. Foragers are of 2 types
Searchers and collectors.
Searchers inform collectors for collecting pollen,
nectar etc. after searching
17. More Classes
Group Function
Builders Make wax cells, comb construction
Cleaners Removes excreta, debris and dead bodies
Fanners Ventilate comb by beating wings
Storekeepers Receive pollen load from collectors and store
Nurses Take care of queen, egg, larvae etc.
Brewers Produce honey
Guards or
soldiers
Guard and protects the colony from intruders
18. There are repairers who seal the holes and repair the
comb.
Waiters watch the queen chamber and attend the
queen
19. Temporal Polyethism
Rather than specializing in one job only, the workers
progresses through colony tasks in predictable order
based on ages.
Regulated Juvenile Hormone JH
Young concentrate in central area cleaning brood
cells and taking care of queen
When they age, they involve in building comb,
receiving pollen and nectar etc.
20. Bee Dance
Karl von Frisch (1886 -1982)
- Austrian Ethologist
-Nobel Prize 1973 in
Physiology or Medicine
- ”The dance, language and
orientation of bees” 1993
- First to discover the dance
of the honeybees
21. Dance – in Communication
The two dances that von Frisch first observed in honeybees
22. The Dance
- Unique animal communication system
-A bee can communicate the location of a profitable food source to its
followers
-What the bee communicates:
-Distance and Direction
-Odour
-Presence of a profitable source
“One of the greatest discoveries of behavioural science” - Gould 1995