10.1371/journal.pone.0027052.g004 Clinton D. Francis Clinton D. Francis Catherine P. Ortega Catherine P. Ortega Alexander Cruz Alexander Cruz Relationship between body mass and PC<sub>Freq</sub>. Public Library of Science 2011 ecology neuroscience Evolutionary biology physics 2011-11-09 01:12:37 Figure https://plos.figshare.com/articles/figure/_Relationship_between_body_mass_and_PC_Freq_/384357 <p>Because frequency features are negatively associated with PC<sub>Freq</sub>, the positive relationship depicted reflects a negative relationship between body mass and vocal frequency.</p>