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. 2009 Dec 9;6(3):350–353. doi: 10.1098/rsbl.2009.0787

Figure 1.

Figure 1.

Bi-plots of mean-centred variable residuals: encephalization (x-axis) is plotted versus (a) litter size and (b) neonate mass. The negative correlation with litter size and positive correlation with neonatal mass point to a conserved reproductive strategy of fewer, larger offspring with increased encephalization, after accounting for among-clade adaptation.