Question

Sigmoid growth curve is represented by

• A. $dN/dt=rN$
• B. $dN/dt=rN(1-N/K)$
• C. $Nt=No+B+I-D-E$
• D. $dN/dt=1-N/K$

Answer 1

The correct option is B $dN/dt=rN(1-N/K)$

The sigmoid growth curve is a graphical presentation that demonstrates the growth of population density / capita, which increases slowly at the initial stage and then rapidly increases in exponential stage then it declines. It depends on the number of population and carrying capacity of the environment. The change in the number of population with time is represented by dN/dt, carrying capacity = K and r is the rate of population increase per capita and thus gives mathematical representation as

dN/dt= rN(1 - N/K)