Predator-Prey Interactions between Shell-Boring Beetle Larvae and Rock-Dwelling Land Snails
Figure 2
Map of Crete and surrounding islands, showing contours of regionally varying Drilus predation rates (given as percentages attacked shells per sample) in Albinaria, derived from bore-hole frequencies in 1,160 museum samples from Naturalis Biodiversity Center, Leiden, The Netherlands, Haus der Natur, Cismar, Germany, and Natural History Museum, Budapest, Hungary.
Maps were drawn using inverse kriging distance calculation in R v.2.15.2 [23], with packages gstat [24], maptools (R v.0.8-27), rgdal (R v.0.8-12) and rgeos (R v.0.3-2).