Before revision:  By allowing the model bacteria to evolve growth rate in the feast period with a trade-off with the death rate in the famine period , the bacterial population tends to increase the growth rate and the death rate , even though that tends to decrease the total population size.
After revision:  By allowing the model bacteria to evolve growth rate in the feast period with a trade-off with the death rate in the famine period , the bacterial population tends to increase the growth rate by changing the counterpart of the trade-off , even though that tends to decrease the total population size.