Delayed reproduction is costly greatly reduces to the

Delayed reproduction is costly (greatly reduces) to the value of “r”
 That’s why most “r” species start to reproduce very early on
 Tradeoffs (costs to early reproduction):
o Reproduce early, die young and vice versa
o Reproduce early, mature into a small adult (body size)
 Large values of “r”, greater population size
o Produce a lot of offspring, die young
o “k” selected tend to be bigger because of competitive advantages, less offspring
 Life History trade-offs in humans
 Life History Summary:
o There is a big variable range between species
o R-k theory makes simple predictions, but are driving force and very effective
o Reproduction is REALLY important to life history strait
o Energy must be shared!!