What is the net recruitment rate formula?

The net recruitment rate (NRR) formula is calculated as the number of new individuals added to a population through recruitment, minus the number of individuals lost due to mortality or emigration, divided by the total population size. Mathematically, it can be expressed as:

[ \text{NRR} = \frac{(N_{\text{new}} - N_{\text{lost}})}{N_{\text{total}}} ]

where (N_{\text{new}}) is the number of new recruits, (N_{\text{lost}}) is the number of losses, and (N_{\text{total}}) is the total population size. This rate helps assess population stability and growth.