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What is monogamy
one male and one female
Is monogamy popular in mammals
no (3-5%)
what mammals practice monogamy
prairie voles, california mice, owl monkey
male assistance
Males provide parental care, critical to survival of offspring, including protection from infanticide
mate guarding
prevents rivals
Ecological constraints
prevent polygyny from being an effective mating strategy, probability of finding another female very low
Are dik-diks monogamy social or genetic
both
Why are dik-diks monogamous
mate guarding- males cover females scent marks
What is polygyny
one male and multiple females
what is the most common mating system
polygyny
what is scramble competition polygyny
When females and resources are dispersed. Males try to find receptive females before other males do
what is female defense polygyny
One male directly defends several females. Occurs when receptive females live in defensible clusters
what is resource defense polygyny
Males guard a patch of resources that females will visit. Females are not clustered, but resources are (antelops)
Lek polygyny
Groups of males fight to control a small area only used for a display arena (topi antelope)
Polyandry
one female and several males
Is polyandry rare
yes, but occurs when male investment is essential
What mammals participate is polyandry
tamarins and marmosets
What are some genetic benefits of polyandry
fertility insurance, good genes, genetic compatibility
what are some material/direct benefits of polyandry
more resources, more paternal care, protection
what is polygynandry
small group of males and a small group of females
what are some mammals that practice polygynandry
lions and chimpanzees
What is promiscuity
random mating within a group
what are some mammals that practice promiscuity
rabbits and bobcats