Evolution CASE STUDIES: The evolution of the honeybee dance language.

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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

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