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To calculate the annual rate of increase in insect life tables, you typically use the formula ( r = \frac{N_t - N_0}{N_0} \times \frac{1}{t} ), where ( N_t ) is the population size at time ( t ), ( N_0 ) is the initial population size, and ( t ) is the time period in years. This calculation provides the per capita growth rate, which reflects the increase or decrease in population over a specific time frame. Additionally, you may also consider the intrinsic rate of increase (r) derived from life table data, which incorporates survivorship and fecundity rates to assess population dynamics.

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