In a forest in India, there are 800 axis deer and 500 barking deer. The forest can support a maximum of 1,200 barking deer. The competition coefficient of barking deer on the axis deer is 0.25, and the competition coefficient of the reverse pair is 0.5. The intrinsic growth rate of barking deer is 2.0. Based on the Lotka-Volterra model, the population growth rate for barking deer is