-10 -5 0 5 10 0.0 0.4 0.8 Time shift In fe ct ivi ty ra ng e A. Arms race dynamics -10 -5 0 5 10 0.0 0.4 0.8 Time shift B.Range fluctuatingselection 2 4 6 8 10 12 0.0 0.4 0.8 Phage time In fe ct ivi ty ra ng e 2 4 6 8 10 12 0.0 0.4 0.8 Phage time 2 4 6 8 10 12 0.0 0.4 0.8 Bacteria time In fe ct ivi ty ra ng e 2 4 6 8 10 12 0.0 0.4 0.8 Bacteria time 2 4 6 8 10 12 0.0 0.2 0.4 0.6 0.8 1.0 Bacteria time Infect ivit y C.Specialism fluctuatingselection Phage time=2 Phage time=4 Phage time=6 Phage time=8 Phage time=10 Phage time=12