Fig. 3
From: Geographical variation in shell shape of the pod razor shell Ensis siliqua (Bivalvia: Pharidae)
Centroid size (square root of the sum of squared distances of a set of landmarks from their centroid as an accurate measure of size) in the shells of Ensis siliqua from each collecting site. The central dot represents the median, the limits of the box, the first and third quartiles, and the whiskers, the 95 % confidence interval. Abbreviations: Olhão—PO, Setúbal—PS, Aveiro—PA, Barra de Cangas—SB, Fisterra—SF, Celeiro—SC and Strangford Lough—IS