Evolution CASE STUDIES: The evolution of the honeybee dance language
Karl von Frisch (Nobel prize 1973)
How does the dance encode direction?
Prof. Lindauer goes to the tropics
Apis cerana – the Asian hive bee
Apis dorsata – the giant honeybee (or rock bee) up to 1 inch long
Apis florea – the dwarf honeybee dorsata and florea in comparison
Apis florea (dwarf honeybee) nest dances are performed on the horizontal surface, waggle run directly oriented to the food source
The evolution of the dance language
Forager behavior Excited running for 13s to 10min (average 2,6 min) Dornhaus & Chittka, Nature 1999
From: Chittka & Dornhaus 1999
Jamming the information content of the waggle dance
oriented dance disoriented dance
Measuring foraging success 12,035 kg Daily weight changes of a beehive can be measured on a scale - this reflects mostly nectar intake
Benefits of dance communication are limited to the tropical habitat
temperate
tropical
Spatial aggregation in tropical and temperate habitats Tropics Temperate
The honeybees originated in tropical Asia