Predation risk in roach of the four lakes studied. Frequency distribution of individual predation risk (from 1 = low to 5 = very high) of roach in the four lakes studied (a-d). Predation score is a log2 (x + 1)-transformed composite of individual fish size and lake-wide piscivory.
Scharnweber et al. BMC Evolutionary Biology 2013 13:132 doi:10.1186/1471-2148-13-132