What are the effects of unequal sex ratios Find an example o

What are the effects of unequal sex ratios? Find an example of population ecology research where an population exhibits unequal sex ratios. Which sex is more prevalent? By how much? What are some effects/characteristics of this unequal sex ratio? 100 words or more please

Solution

Sex ratio is the ratio of males to females in a population. The sex ratio unequality is found mostly in humans. In humans, the number of males are more as compared to females.

Asia is the only continent with the sex ratio >100 at 104. North America stands at 96.8 and Africa at 99.8. There are marked differences in sex ratios across countries which leads to a number of societal consequences due to this unequal sex ratio. Some of the consequences are listed below:

1) Because of prenatal sex determination results in cohorts of \"Surplus\" young men. Due to this, the consequences of this male surplus are largely speculative. The consequences includes, increased level of violence.

2) It is not in dispute that over the next 20 years in large parts of Asia there will an excess of males. In parts of China and India, there will be 12-15% excess of young men. These men will remain single and will be unable to have families, in societies where marriage is regarded as virtually universal and social status and acceptance depend, in large part, on being married and creating a new family.

Unequal sex ratio is found in population of four breeding colonies of Herring Gulls. They have a ratio of 0.67 males: 1 female based on the frequency of female-female pairs, ratio of non-breeding females to males in clubs and the total number of birds in the colony. The female population is more as compared to males in Herring Gulls.

Consequences of unequal sex ratio in Herring Gulls: