Presentation Transcript
Communication 2: Communication 2 CASE STUDIES:
The evolution of the honeybee dance language
Karl von Frisch 1886-1982 (Nobel prize 1973): Karl von Frisch 1886-1982 (Nobel prize 1973)
Slide4: How does the dance encode direction?
Prof. Lindauer goes to the tropics: Prof. Lindauer goes to the tropics
Apis cerana – the Asian hive bee: Apis cerana – the Asian hive bee
Apis dorsata – the giant honeybee (or rock bee): Apis dorsata – the giant honeybee (or rock bee) up to 1 inch long
Apis florea – the dwarf honeybee: Apis florea – the dwarf honeybee dorsata and florea in comparison
Apis florea (dwarf honeybee) nest: 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: The evolution of the dance language
Forager behavior: Forager behavior Excited running for 13s to 10min (average 2,6 min) Dornhaus & Chittka, Nature 1999
Slide13: From: Chittka & Dornhaus 1999
How can we measure the adaptive benefits of communication? : How can we measure the adaptive benefits of communication? The bee dance language as a model
Jamming the information content of the waggle dance: Jamming the information content of the waggle dance
Measuring foraging success: Measuring foraging success 12,035 kg Daily weight changes of a beehive can be measured on a scale - this reflects mostly nectar intake
Slide18: Temperate habitat (Central European)
Slide19: Temperate habitat (Mediterranean)
Slide20: Tropical habitat (India) - days of high nectar intake are missing without location communication
Slide21: Benefits of dance communication are limited to the tropical habitat
Slide22: temperate
Slide23: tropical
Slide24: Spatial aggregation in tropical and temperate habitats Tropics Temperate
Slide25: The honeybees originated in tropical Asia