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Table 1 Examining static allometry: MANCOVAs of cranial and humeral shape by size and taxa (Y ~ size*taxa)

From: Getting a head in hard soils: Convergent skull evolution and divergent allometric patterns explain shape variation in a highly diverse genus of pocket gophers (Thomomys)

 

Df

SS

MS

R2

F

P

Lateral Cranial Shape

 log (size)

1

0.14527

0.145267

0.20361

203.2500

0.001

 taxa

9

0.27228

0.030253

0.38163

42.3282

0.001

 log (size):taxa

9

0.01002

0.001113

0.01405

1.5579

0.001

 residuals

400

0.28589

0.000715

   

 total

419

0.71345

    

Ventral Cranial Shape

 log (size)

1

0.16758

0.167576

0.20197

222.7192

0.001

 taxa

9

0.32645

0.036273

0.39346

48.2088

0.001

 log (size):taxa

9

0.01063

0.001182

0.01282

1.5703

0.001

 residuals

432

0.32504

0.000752

   

 total

451

0.82970

    

Anterior Humeral Shape

 log (size)

1

0.004505

0.0045052

0.07927

9.2624

0.001

 taxa

8

0.021335

0.0026669

0.37536

5.4828

0.001

 log (size):taxa

8

0.004246

0.0005307

0.07470

1.0911

0.092

 residuals

55

0.026752

0.0004864

   

 total

72

0.056838

    
  1. The effect of centroid size (a proxy for body size) on cranial and humeral shapes within the 10 distinct genus Thomomys taxa as evaluated by MANCOVA (details in methods). Degrees of freedom (Df) for each sums of squares (SS) of each term, model residuals, and the total are presented, along with the coefficient of determination (R2), and the F ratio and associated P value. Statistical significance of the models was evaluated by permutation using 1000 iterations. Bold indicates p-values less than 0.05