Figure 3From: Spatial and temporal changes in zooplankton abundance, biovolume, and size spectra in the neighboring waters of Japan: analyses using an optical plankton counter Comparison between OPC-derived biovolume and directly measured wet mass of whole samples. The long-dashed line indicates position 1:1. One datum at an anomalously high value of directly measured wet mass indicated by an open symbol was omitted from the following analysis.Back to article page