Fig. 4 in Trematode infection affects shell shape and size in Bulinus tropicus

Fig. 4. Morphospace occupation plot reconstructed by non-metric multidimensional scaling (NMDS) on the Procrustes shape coordinates of 198 individuals of Bulinus tropicus from Lake Kasenda. Blue circles indicate uninfected specimens, orange symbols infected specimens, with ∇ = single infection by Echinoparyphium sp.; Δ = single infection by Austrodiplostomum sp. 2; □ = single infection by Plagiorchiida sp. I; ◊ = single infection by Petasiger sp. 5; ○ = any other infection. Filled symbols indicate the mean shape for each infection group, and the filled orange circle represents the mean of all trematode-infected snails. Vectors indicate the shape changes by any of these infection types compared to uninfected specimens. These differences are further illustrated in Fig. 5. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)