Multidimensional mechanics: Performance mapping of natural biological systems using permutated radar charts
Fig 5
Feeding vs singing performance of Darwin’s finches.
(a) Normalized, permutated radar chart comparing eight Darwin’s finches, showing the properties correlated with feeding and singing performance as well as the distinct functional trade-off between base bite force and vocal potential. (b) Individual profiles of Darwin’s finches, showing their reported averages (lines) and ranges (shaded regions). (c) Radar charts illustrating the intersections and unions of G. scandens-C. pallida (left) and G. magnirostris-C. olivacea (right). (d) Comparisons of the profile areas, A, centroidal distances, R, relative first moments of area, Q′, and compactness, C; colored bars callout the two maxima of each shape descriptor as referred in the text. Legend: base bite force (BBF), tip bite force (TBF), gape (G), opening velocity (OV), closing velocity (CV), vocal potential (VP). Notes: Beak sketches are adapted from literature [58]. Data are listed in S6 Table, compiled from numerous sources (see Supporting Information).