Parasite mediated sexual selet
Why do some birds have long tails, others have bright plumage or patterns and others possess beautifully complicated songs. Many animal behaviourists have agreed that all these characteristics are developed as a result of female sexual selection, but that is where the agreement stops.The many theories on the evolution of secondary sexual characters, are an evolution in their own right. The purpose of this paper is to analyse the evolution of the research and hypotheses on this subject. How did each come about and lead to another, which was proven and find the answer to the question: How do females benefit from choosing a male with an enhanced morphological feature? Sexual selection is a corollary of natural selection and the two processes work in the same manner. Natural and sexual selection often create different selection pressures: natural selection results in traits that enhance reproduction and survival, where as sexual selection results in traits that enhance reproductive success, but at the expense of survival (Ghiselin(1969) of Darwin in Birkenhead & Moller 1991). Sexual selection occurs when the members of one sex mate disproportionately with members of the opposite sex on the basis of seco
. . .
Some common words found in the essay are:
Birkenhead Moller, Hamilton Zuk, Asymmetry Fluctuating, Krebs Davies, Marion Petrie, Malte Andersson, Enquist Arak, , Cambridge University, Blamford Thomas, sexual selection, moller 1991, birkenhead moller 1991, birkenhead moller, krebs davies, mating success, krebs davies 1993, davies 1993, male quality, et al, al 1991, female choice, et al 1991, petrie et al, fisher krebs davies,
Approximate Word count = 2954
Approximate Pages = 12 (250 words per page double spaced)
|
