ancom_lec18 C - Oct 27, 2010 PSY 3364 Animal Communication...

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1 PSY 3364 Animal Communication Oct 27, 2010 African elephants • Elephants live in close-knit, long-lasting groups and are in constant communication. • In adult male elephants, testosterone levels are elevated for one month each year. • During this time they compete aggressively with other males to establish their dominance status and to gain access to females. • This condition is called musth . African elephants • Adult male elephants produce an acrid, penetrating odor from a gland on their faces. • Young male Indian elephants in musth (and possibly African elephants as well) produce a th lik t “lik i t f sweet, honey-like scent “like a mixture of flowers.” In India this state is called moda . • Moda males seem to be broadcasting immaturity and unwillingness to fight for dominance and mates. Older musth males avoid or ignore moda males (and vice versa). African elephant • In response to the musth rumble of a high-ranking male, other musth males approached the speaker aggressively, whereas non-musth males walked away from the stimulus. • The calls of estrous females attracted musth males h h d th k idl hil who approached the speaker rapidly, while non- musth males listened and then walked away. • Females responded to the musth rumbles of males by approaching the speaker, vocalizing or secreting from the temporal glands. Poole JH (1999). Signals and assessment in African elephants: evidence from playback experiments . Animal Behaviour 58(1): 185-193. Giraffe Odor • Older male giraffes are known to transmit a powerful, unpleasant odor, detectable at a large distance. • Wood (Science, 2002) has discovered that chemicals in the giraffe’s hair contain a range of chemicals in the giraffe s hair contain a range of antibiotics and parasite repellants. Among other
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This note was uploaded on 11/11/2010 for the course PSY PSY 3364 A taught by Professor Dr.peterassmann during the Spring '10 term at University of Texas at Dallas, Richardson.

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ancom_lec18 C - Oct 27, 2010 PSY 3364 Animal Communication...

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