Figure 3

Age structure of Arvicola terrestris populations. Box and whisker plots of dry eye lens weights for males and females collected in five sites (AM, CE, CU, DY, and NG) from spring 2015 to spring 2018 (eye lenses were not collected in autumn 2014). Letters indicate groups of populations that do not differ significantly; comparisons were restricted to within locations. Figure prepared in R (version 3.5.2, R Core Team55), using ggplot2101.