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Figure 6 | BMC Evolutionary Biology

Figure 6

From: Effect of temperature and glia in brain size enlargement and origin of allometric body-brain size scaling in vertebrates

Figure 6

Regression residual analysis of model prediction and actual brain mass. A. Least-squares regression of the log10(model prediction) versus log10(actual brain mass) of the endotherms (including mammals, birds, primates and dolphins) (N = 1335), and ectotherms (including fishes, reptiles and amphibians) (N = 367). B. Least-squares regression of the residuals of the log10(brain mass) = log10(actual brain mass)- log10(model prediction) versus the log10(body mass) for the endotherms (red triangles) (N = 1335, CC = 0.411, adjusted- R2 = 0.169, p < 0.01) and the ectotherms (blue plus) (N = 367, CC = 0.0488, adjusted- R2 = 0.0024, p < 0.35). C. Least-squares regression of the log10(brain mass) versus log10(body mass) for the tropical-water fish (N = 105, adjusted- R2 = 0.962, p < 10−5), temperate-water fish (N = 70, adjusted- R2 = 0.924, p < 10−10), and polar-water fish (N = 35, adjusted- R2 = 0.79, p < 10−5). D. Least-squares regression of the residuals of the log10(brain mass) versus log10(body mass) for the tropical-water fish (N = 105, adjusted- R2 = 0.278, p < 10−5), temperate-water fish (N = 70, adjusted- R2 = 0.0227, p < 10−5), and polar-water fish (N = 35, adjusted- R2 = 0.0302, p < 10−5).

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