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Lecture notes - November 16, 2012.docx

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Robert Gerlai

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Lecture notes - November 16, 2012 Animal Communication - Chapter 5  communication universal over all animals  whales can "whistle" to other whales even over long distances to keep in touch with them  fish often use mild electric pulses to talk to each other  elephants use infra-sound (sound below range we can ear)  eagles drop rocks and catch them during courtship to test each other for fitness (is eagle good mate, can it defend and feed chicks?)  red-winged blackbird: louder they sing, means they have a better immune system, make more sperm, have high fitness  don't need to memorize bird song system slide  sexual selection: males that have characteristics that females prefer will have more surviving offspring  females often prefer larger males (fish) 
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