Mean NBSS of six groups (A, B-1, B-2, B-3, C and D) identified from cluster analysis on mesozooplankton biovolume size spectra (cf. Figure
A). In the Western North Pacific and adjacent seas during May and June to August 2011. Numbers in parentheses indicate the number of stations belonging to each group. The mean and standard deviations of copepodid five stages of Neocalanus copepods (Nc, Neocalanus cristatus; Nf, N. flemingeri; and Np, N. plumchrus, Yamaguchi et al. 2014) are shown in panel for group C.