Chapter 8 Flashcards
(16 cards)
Monogamy
One partner, not common in mammals
Serial Monogamy
One partner for a season
Reasons males should be monogamous
resources are limited
territory competition
females cant raise offspring alone
Altricial
offspring unable to function alone
Another word for extrapair copulations
cheating
Social monogamy
primary breeding partner with epc on side
Genetic monogamy
truly monogamous
Benefits of extrapair copulations for males
more mating
dont have to raise all offspring
Benefits for extrapair copulations for females
Makes sure all eggs are fertilized (Fertility insurance hypothesis)
can select males with good genes
increase in direct benefits
Benefits for extrapair copulations for both male and female
Genetic diversity and survival increase
Polygamy
Multiple partners for a season
Polygyny vs Polyandry
male has many females
female has many males
Female defense polygyny (common in mammals)
one male defends group of females (harem)
can mate with all of them
Resource defense polygyny
Males defend resources from other males for females’ reproduction
Polygyny threshold model
predict when a female should choose polygyny over monogamy
Always choose monogamy until polygyny offers better fitness
Promiscuity
multiple mating partners for both the male and the female