female mating strategies Flashcards
matrilinnes primates?
orangutans
some prosimians (mouse llemurs, galago)
what is a matrilline
an individual is considered to belong to the same descent group as their mother.
advantages of matrillines
protection and survival
shared parenting
shared feeding strategy
advantages of a polygynandrous system for a female
variance of genes
more protection
more defense
(IF lots of food to go around)
challenges for male in polygynandrous systems
- dominance hierarchies (male to male competition)
- female cooperation
- intergroup encounters
why might a female decide to engage in an extra-group copulation
- more disease resistance in the offspring
- allows outsider to enter
- less agression faced than all the male
why would a male have a large testes?
if there is seasonal breeding= high sperm competition in polygynandrous society
i.e. ring tailed lemurs
examples of seasonal changes in males during breeding season
- large testes
- more testoestrone
- seonal weight gain to be bigger
examples of males that go through seasonal metaphormissi
central american squirrel monkey, sifaka, capuchins
van shiek
looked at interspecies variation in dirunal primates of females
what does van shiek suggestabout female social relationships
competition within groups take into acocunt preadtory safety/infancitide
but between/within resource compeititon decides social relationships
female fitness
of succesfully raised offspring
depends on:
- food quality/quantity
- level of safety
scramble competition
lots of food= net food intake of all equally affected by increase in population density
contest competitiont
limited resources= dominant/territory owners get more than lowers
