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22 Cards in this Set

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  • Back
Fission fusion society
mulitple males and females in a group but with frequent changes.
What type of social groups are there?
Predator defense, resource defense, mate acquisition
Predator Defense
advantages: selfish herd effect alarm calls mobbing
disadvantages: predator attraction
Selfish Herd
More odds for individual survival.
Resource Defense
Advantages: access to resources defended by other groups
Disadvantages: must share resources with your group members
Mate Acquistion
Advantages: greater access to potential mates
Disadvantages: leads to competition over mates
Mate Acquisition
Advantage: greater access to potential mates
Disadvantage: leads to competitions over mates
Females limitation to reproductive success
Time Interbirth interval
Surivival of Offspring
Males Limitation to reproductive success
Access to mates
Survival of Offspring
Sexual Selection
Special case of natural selection. Traits are favored because they enhance ability to access to mates.
Sexual selection partitions
Intrasexual selection
Intersexual selection
Intersexual Selection
Mate selections based on certain phenotypes that are favored.
Intrasexual Selection
Competition within the same sex group. Male male competition.
Female promiscuity
copulating with more than one male
Sperm Competition
sperm between two or more males compete to fertilize an ovum.
Monogamy
M-M competition low F promiscuity low
Polygyny
M-M Competition very high Female promiscuity low
Multi Male Multi Female
Male Competition high F Promiscuity Very High
Most Common Mating System
Polygyny: Females have access to a quality male; Males has access to numerous females.
Least Common Mating system
Polyandry: Only really happens when resources and offspring survival are low.
Highest number of children produced by one human male
888
Highest number of children delivered by one human woman
69