Sexual Selection Is Part Of Natural Selection

Sexual selection: it is part of natural selection. Sexual selection acts on an organism's ability to obtain or successfully couple with a mate. Selection makes many organisms go to extreme lengths in order to find a mate such as: peacocks need to develop a beautiful tail, elephant seals fight over territories…. Sexual selection is often powerful enough to produce features that are harmful to the individual’s survival. For example, extravagant and colorful tail feathers or fins are likely to attract predators as well as interested members of the opposite sex.
In nature females always invest more energy into producing offspring than males invest, and as a result in most species females are a limiting resource that male have to compete for. In