minute relative to the size of the ova, males invest less in gametes than females. Dewsbury (1982)argued that although they are smaller, there are a high number transferred in an ejaculate or spermataphore, the strategy possibly evolved as a result of sperm competition. E.g the more lottery tickets you have the higher the chance of winning (Birkenhead & Moller 1991).
             There are three main hypothesis that run through the whole subject of sexual selection, within which are many more hypothesis.
             One of Darwin's greatest achievements was the recognition that variation in characters such as antlers or elaborate plumage resulted in variance in reproductive success (Birkenhead & Moller 1991). Darwin suggested that evolution of elaborate plumage is due to female choice (Darwin in Petrie 1991). Darwin (1871) defined 'sexual selection' as the effects of 'a struggle between the individuals of one sex, generally the males, for possession of the other sex'(Darwin in Birkenhead & Moller 1991). Although the idea that traits such as antlers are involved in male - male competition was and remains relatively uncontroversial, Darwin's views on the role of female choice were hotly debated from the start (Howlett 1993). Darwin suggested that many apparently deleterious secondary sexual characters in males such as bright colours, elaborate ornaments and conspicuous displays, evolved as a result of female choice. Darwin never tried to explain the crucial agent of selection, that females have preferences for exaggerated male traits. Rather, he took it for granted that females of many species possess a 'sense of beautiful', akin to the sense in humans (Enquist & Arak 1993).Although Darwin did not have a satisfactory explanation for the origin and maintenance of the female choosiness assumed to drive the evolution of male traits his theory continued and was revitalised in 1915 by the English geneticist R.A. Fisher(Howlett 1993)
             Fisher's basic idea was that...