Fig. 2

Illustration of the shape of offcrop to analyse the effect on common vole population survival and the effect due to hypothetical pesticide application. Three shapes were considered: a square-shaped offcrop (a 90 m edge length), a cross-shaped offcrop (b) of the same area and a thinner cross-shaped offcrop (c also of the same size). All offcrop was assumed to be surrounded by fields