APY107 - Primate Mating Systems

APY107 - Primate Mating Systems - Competition between...

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Primate  Mating  Systems
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Reproductive strategies: r-selected - adaptive strategy that emphasizes relatively large numbers of offspring and reduced parental care. k-selected - adaptive strategy whereby relatively few offspring are  produced, with greater parental  care.
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Primate social systems
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# of males and females are  correlated in OWM groups
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Female  reproductiv e strategies
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Visual mating cues
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Intensive parental  investment
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Primate infants weaned when 4x birthweight is reached.
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Dominance Ability of one individual to intimidate  or defeat another in aggressive or  competitive interactions. Dominance hierarchies establish a  “pecking order” among group  members.
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Correlation b/t female rank and reproductive success (gelada baboons)
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Female-bonded Kin Groups Stable relationships between  female relatives
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Allomothering Investment in  offspring by non- mothers.
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Male-female bonds
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Male Reproductive Strategies
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Intrasexual selection
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Unformatted text preview: Competition between members of the same sex for mates. A trait appears in one sex because it has been preferred by the other. Sexual Dimorphism Differences between males and females of the same species. Infanticide Killing of infants Drives mother(s) into estrous which increases reproductive fitness of male. Dominance even more important for males Juveniles inherit rank of mother Correlation b/t male rank and reproductive success (long-tailed macaques). Grooming behavior Picking through fur to remove dirt, parasites, and other materials that may be present - reinforces social relationships. Grooming behavior provides a way for lower-ranking males to show deference to higher-ranking males Sperm Competition Form of intrasexual selection where the testes of some groups are relatively large Daddy daycare? The End!...
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This note was uploaded on 10/10/2010 for the course APY 107 taught by Professor Krumrine during the Fall '09 term at SUNY Buffalo.

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APY107 - Primate Mating Systems - Competition between...

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