Question

The figures below refer to a herd of water buffalo. Birth rate = 35 Death rate = 7 Immigration = 4 Emigration = 17 What is this population growth?

Answer 1

total population will be 41

Answer 2

Answer:

The correct answer would be 15.

The population density (Nt+1) at time t+1 = Nt + (B + I) - (D +E)

Where,

• Nt = population density at time t.
• B = Natality or number of birth
• I = Immigration or number of individuals of the same species that have come into the habitat.
• D = Mortality or number of deaths
• E = Emigration or number of individuals of the same species that have left the habitat.

So, population growth would be = (35 + 4) - (7 + 17)

= 39 - 24

= 15

Thus, the population growth would be = 15