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communication 2

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Published on November 27, 2007

Author: Janelle

Source: authorstream.com

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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

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