have higher levels of estradiol are positively correlated with higher mate values in women, and higher levels of testosterone are positively correlated with higher mate values in men. Individuals that are physically and hormonally more masculine tend to have brothers that are fairly more attractive than their sisters, while more feminine individuals have sisters that are more attractive than their brothers. This suggests that intralocus sexual conflict can mediate and determine the fitness of an individual. Human hips are another example, where females need larger hips for childbirth as opposed to smaller hips (optimal for walking) for males. The genes that affect hip size must reach a compromise that is at neither the male optimum nor the female optimum. In the Ibiza wall lizard (Podarcis pityusensis), intralocus sexual conflict exist over color. In this species, color is used as a signal of male fighting ability. Males that are more brightly colored are perceived as better fighters. As lizards in this species age, they become larger and more colorful. During mating seasons, males will typically compete for females and resources by fighting with each other. Males will select opponents based on the intensity of the color of their opponent's coat. Females of this species also possess brightly colored coats. This trait is detrimental for females, since being colorful makes them more conspicuous to males and predators. However, in males, being colorful helps males win fights and increases their reproductive success. Another example can be seen in the features of the soay sheep (Ovis aries) horns, and the length of the serin finch's (Serinus serin) tail. Males that possess larger horns or longer tails in these species have higher success during male competition and increased reproductive success. However, these features require a great deal of energy for females to possess and do not benefit females in any significant way. Intralocus genetic differences between males and females have been identified in a variety of fish species using RAD sequencing, including gulf pipefish and deacon rockfish. It has been hypothesised that some of the loci in deacon rockfish may be examples of intralocus sexual conflict but their function and evolutionary significance is currently uncertain. Resolution There have been several hypotheses made that attempt to explain possible resolutions for intralocus sexual conflict. In one proposition, it is suggested that intralocus sexual conflict can be minimized through sex-dependent gene regulation. By doing this, genes that are