Data from: Immigration of susceptible hosts triggers the evolution of alternative parasite defence strategies

Hélène Chabas, Van Houte Stineke, Molin Hoyland-Kroghsbo Nina, Buckling Angus, Westra R. Edze, Nina Molin Høyland-Kroghsbo, Angus Buckling, Stineke Van Houte & Edze R. Westra
Migration of hosts and parasites can have a profound impact on host–parasite ecological and evolutionary interactions. Using the bacterium Pseudomonas aeruginosa UCBPP-PA14 and its phage DMS3vir, we here show that immigration of naive hosts into coevolving populations of hosts and parasites can influence the mechanistic basis underlying host defence evolution. Specifically, we found that at high levels of bacterial immigration, bacteria switched from clustered regularly interspaced short palindromic repeats (CRISPR-Cas) to surface modification-mediated defence. This...
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