anthro 128 week 9

anthro 128 week 9 - Dunbar article: (1) The encephalization...

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Dunbar article: (1) The encephalization quotient is a baseline used to measure all deviations in brain size. This, however, creates a problem because brain development is highly conserved in evolutionary terms and thus, as body size increases, brain size does not necessarily grow also. As a result of this liability of body size, the neocortex ratio is preferred because it is a measure of the brain part of interest (since it is regarded as the seat of those cognitive processes that we associate with reasoning and consciousness and therefore may be under the most intense selection from the need to improve the effectiveness of these processes) with regard to the entire brain size. Cheney and Seyfarth article: (1) In one case, a vervet monkey gave a false leopard call in order to keep a migrant monkey from entering the group; in this case the resident monkey used deceptive tactics as opposed to violent methods to keep the migrant monkey from entering the group because often times if the migrant is a younger and stronger individual, the resident male will fail at driving him away. In another case, a study was performed between three monkeys to show if a mother would be able to identify the scream of her child. The scream was played from a hidden speaker and instead of looking in the direction of the speaker, two of the monkeys looked in the direction of the mother to see what she would do in response to hearing this; this study showed that vervet monkeys are aware of the relationships of others. In contrast to these examples of high social intelligence, vervets are also poor at identifying the visual cues left behind by predators. An example of this is witnessed in their lack of identifying the potential presence of a leopard. Leopards catch their prey and proceed to eat the carcass in a tree, if a vervet sees a leopard eating a carcass in a tree it will sound an alarm call. If, however, a vervet sees a carcass in a tree without a leopard it cannot associate that a leopard may be nearby and will thus fail to alarm call. Manipulative monkeys
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This note was uploaded on 04/02/2010 for the course ANTHRO 111508201 taught by Professor Perry during the Spring '10 term at UCLA.

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anthro 128 week 9 - Dunbar article: (1) The encephalization...

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