Distribution maps of foraminifera on CPR samples Published January 10, 2012 at 960 × 720 in Plankton and Policy Distribution maps of foraminifera on CPR samples (measured as frequency of occurrence). From: McQuatters-Gollop, A., Burkill, P., Beaugrand, G., Edwards, M., Gattuso, J.-P. and Johns, D.G., 2010.