Figure 2.

(a) Fluctuations in rabbit abundance in Australia between 1950 and 2000 during three critical attempts at biological control: 1950 myxomatosis; 1970 rabbit fleas which increased the efficacy of myxomatosis transmission; and 1995 rabbit haemorrhagic disease (RHD). Adapted from Saunders et al. [37]. (b) Changing mortality rate (%) for rabbit populations repeatedly exposed to myxomatosis. The significant decrease in mortality is often used as evidence of coevolution between host and virus. Adapted from Best & Kerr [38].