Question

Calculate the net reproductive rate or population growth rate (Ro) for a certain population of organisms that reproduce each year and live only 5 years, after which individuals die of old age. In each year only 40% of the females survive and each one leaves on average 10 descendants. The sex ratio of the population is 0.5. Will the population increase in subsequent years?

What would be the intrinsic rate of growth (contribution per capita) of the population?

Answer 1

Population sex ratio (males per 100 females) In the human species the ratio between males and females at birth is slightly biased towards the male sex. The natural “sex ratio at birth” is often considered to be around 105. ... Because women account for one-half of a country's potential, balanced sex ratio is desirable.

Yes the population will tend to increase as from the data provided 40% of the females survive and each one leaves on average 10 descendants. Which is quite significant to prove that there will be increase in the population.

Very simply, this rate can be understood as the number of births minus the number of deaths per generation time—in other words, the reproduction rate less the death rate.

Since 40% of the females survive and each one leaves on average 10 descendants. As we see reproduction rate is quite higher than the death rate . so it wil not have an impact on the intrinsic rate of growth.