Socialization and the Life Course Flashcards
What is the Life History Theory?
The timing of key events have been shaped organisms by natural selection to maximize the number of surviving offspring and maximize fitness
Give me examples of Life History Theory
- The timing of different juvenile development
- Timing of sexual maturity
- Timing of death
- Timing of senescence
- Number of offsprings you have and the degree of parental investment you give
Life History Theory - Trade offs
- The idea of balancing energy outputs. Quality vs quantity of offsprings
- Current vs future reproduction
Life History Theory - Energy Allocation (2)
1) Survival
2) Reproduction
Life History Theory - Energy Allocation - Survival (2)
1) Growth
2) Maintenance
Life History Theory - Energy Allocation - Reproduction (2)
1) Making babies
2) Caring for babies
Life History Model in a nutshell
The idea that the animal has a maximum energy output
Life History Model in a nutshell - An animal could either
1) Put more energy in reproduction
2) Put less energy in reproduction
Life History Theory - Fast Life History vs Slow Life History - Fast Life History
- more energy into reproduction
- Short life & breeds a lot
- Low quality offsprings
Life History Theory - Fast Life History vs Slow Life History - Slow Life History
- More energy into survival
- Long life & breeds and extensive parental care
- Modest reproduction rates
Life History Theory - Fast Life History vs Slow Life History
Survival vs Energy use for reproduction
What is r vs k selected?
K is more like humans
r is like a rodent
R selected
- reproduce early in life
- small body / brain
- Large litters
- High Mortality rates
- Short lifes
K selected
Reproduce later in life
larger brains/ bodies
- smaller litter size
-Long lifes
In general primates have longer lives Exceptions:
- Sterpsirrhines: relative fast life history compared to happlorhines
- Apes very slow life history
Why are primates slow life history species?
Because of the variation in food seasons and its availability.
Altricial vs Precocial
Ability to sustain itself at the point of birth
Altricial?
1) Undeveloped at birth
2) Physically helpless
Precocial
1) Well developed at birth
2) Active or physically mobile at birth
What are more altricial, Strepsirhini or Haplorhini’s?
More - Haplorhini- more useless at birth
Less - Strepsirhini - less useless at birth
Birth in primates are called
Singletons
Birth in primates - Singletons - When not parked are they carried and if so why? AND Are they assited
Yes, and to provide learning opportunity through observation and NEVER assisted they pop that baby on their own
Birth in primates - Singletons - When not parked are they carried and if so why? exception to the singletons and them being assisted
Callitrichids
Why can’t humans have unassisted births?
Obstetrical Dilemma
Why can’t humans have unassisted births - Obstetrical Dilemma
Human have very large brain and small birth canals
Why can’t humans have unassisted births - Obstetrical Dilemma - Adaptatitions
1) Very early birth
2) Skull plate fusion
3) Flexible Perlvis
4) Assited birth