When mating is random, or is monogamous (one male mates with one female), protandry (male to female sex change) is favored. In these systems, female fertility increases more rapidly with size than male fertility and larger females usually have a higher reproductive success than males of the same size.

What is a Protandry in biology?

protandry (uncountable) (biology) The condition in which an organism begins life as a male and then changes into a female. (botany) The condition of flowers whose male parts mature before the female ones.

What is an example of Protandry?

An example of protandry is clownfish. In hermaphrodites, sperms are produced before eggs, for example, earthworms and crustaceans. It also promotes cross-fertilization and prevents self-pollination. Some examples are mint, salvia, legumes, ivy, etc.