Entomology. insect. Sexual Selection Essay Example | Topics and Well Written Essays - 500 words

Entomology. insect. Sexual Selection - leaven ExampleThe two point mandibles found in the male beetle be because of sexual survival. In the case of stag beetles, the males fight and the females choose the strongest. This ensures that the female choose and reproduce with males who posses their favourable characters. Sexual selection is only for male and that is why the male develop adaptive and non-adaptive features to attract the female.The male beetle genital morphology comprises of two outstanding and general models of morphological variation. This morphological variation includes swift evolutionary difference both in shape and in complexity as well as poor kin with body size as suggested by Simmons, Tomkins and Hunt (1999). The aspect of sexual selection causes these variations. Some of the variations are non-adaptive, for instance, the reduction of the scaling relationship between the genital size and the body size. The idea that evolution of new-fangled traits is followed by trade-offs is important in evolutionary studies. The weapons used by the male stag beetle in fighting can be physiologically expensive and are mostly trade offs with investment in other characters, like spermatogenic investment and wings. This investment into other weapons results in the evolution of mating strategies for the male beetles. For instance, the magnify mandibles used for male-to-male competition. The male-male fight in sexual selection accounts for the evolution of exaggerated traits used as weapons in male competition. The exaggerated characters can be responsible for the dispersal and ejaculatory strategies. The change of investment into other traits or weapons for competition can lead to evolutionary changes in life history characters. Since investment in exaggerated traits can cause trade-offs alongside other traits related to fitness, life history tactics are touch on by evolution of sexually selected behaviour.During evolution, the males population