Association between extreme immunological gene expression and live-trapping catch rate in an Apodemus sylvaticus population in the UK across May–December 2008 (12 temporal sampling points).

A. Superimposed plot of all immunological gene expression measurements showing spikes of extreme activity in late June and early September (variables log-transformed and standardized, [x−mean]/standard deviation). Fractions show proportion of individuals with expression profiles classified as extreme at each sampling point. Fractions shown in bold indicate the contribution of individuals with extreme immunological expression at the corresponding sampling point to a statistically significant (P = 0.001) temporal cluster. B. Percentage change in catch rate (Δ catch) between sampling points. There was a highly significant overall positive trend in catch rate with time (P<0.001) but closed circles indicate instances of negative growth in catch rate (*, catch rate significantly less than at 1 sampling point or 2 sampling points earlier).