12 Facts About Parental investment

Parental investment theory is a branch of life history theory.

Clutton-Brock expanded the concept of parental investment to include costs to any other component of parental fitness.

Special case of parental investment is when young do need nourishment and protection, but the genetic parents do not actually contribute in the effort to raise their own offspring.

Parental investment proposed that the more experienced the individual, the better that individual will be at replenishing his exhausted body reserves, allowing him to remain at the egg for a longer period of time.

Parental investment as defined by Robert Trivers in 1972 is the investment in offspring by the parent that increases the offspring's chances of surviving and hence reproductive success at the expense of the parent's ability to invest in other offspring.

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Parental investment can be split into two main categories: mating investment and rearing investment.

The rearing Parental investment is the time and energy expended to raise the offspring after conception.

Parental investment theory is not only used to explain evolutionary phenomena and human behavior but describes recurrences in international politics as well.

Specifically, parental investment is referred to when describing competitive behaviors between states and determining aggressive nature of foreign policies.

Parental investment hypothesis contends that male physical strength of a coalition still determines the aggressiveness of modern conflicts between states.

The fetus requires high Parental investment from the mother, and the altricial newborn requires high Parental investment from a community.

One explanation for the demographic transition is the increased parental investment required to raise children who will be able to maintain the same level of resources as their parents.