Figure 3b from: Wayland M (2013) Morphological variation in Echinorhynchus truttae Schrank, 1788 and the E. bothniensis Zdzitowiecki & Valtonen, 1987 species complex from freshwater fishes of northern Europe. Biodiversity Data Journal 1: e975. https://doi.org/10.3897/BDJ.1.e975

Figure 3b - Principal component analysis of the proboscis profiles of female and male Echinorhynchus truttae. The first (PC1) and second (PC2) principal components describe 49% and 15% of the variance in the data. Analysis based on data in Suppl. materials 4, 5.
Scatterplot of the loadings for PC1 and PC2. Key: L, length variables; B, base variables.