"Social behavior contributes to both individual survival and reproductive fitness," she said.

Males optimize their reproductive fitness in a number of ways.

Men, however, may increase their reproductive fitness by being unrestricted and having many children with many women.

Language ability correlates with an individual's reproductive fitness 2.

Their model consists of a population with constant size, where language ability is a predictor of reproductive fitness.

There may also be a range of secondary organs that increase reproductive fitness.

As reproductive fitness is not impacted, homozygous affected individuals have been reported.

On any species, if some adaptation has no advantage for reproductive fitness, over time it will probably lose importance or be lost.

In small groups no male was dominant and individuals displayed similar reproductive fitness.

Thus, female workers can maximize their reproductive fitness at the expense of the colony.