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Table 1.

Scaling of metathoracic femur mass, extensor tibia muscle mass, femoral exoskeleton mass, and metathoracic leg length with body mass across instars of S. americana (N=196)

Log variableSlope (s.e.m.)Upper 95% C.L.Lower 95% C.L.Intercept (s.e.m.)r2
Femur mass (mg) 1.046 (0.007) 1.059 1.032 -1.117 (0.019) 0.99 
Extensor tibia muscle mass (mg) 1.006 (0.007) 1.020 0.992 -1.06 (0.019) 0.99 
Femoral exoskeleton mass (mg) 1.470 (0.013) 1.496 1.444 -3.305 (0.037) 0.98 
Leg length (mm) 0.375 (0.006) 0.387 0.363 0.156 (0.016) 0.96 
Log variableSlope (s.e.m.)Upper 95% C.L.Lower 95% C.L.Intercept (s.e.m.)r2
Femur mass (mg) 1.046 (0.007) 1.059 1.032 -1.117 (0.019) 0.99 
Extensor tibia muscle mass (mg) 1.006 (0.007) 1.020 0.992 -1.06 (0.019) 0.99 
Femoral exoskeleton mass (mg) 1.470 (0.013) 1.496 1.444 -3.305 (0.037) 0.98 
Leg length (mm) 0.375 (0.006) 0.387 0.363 0.156 (0.016) 0.96 

All equations are in the form: log variable = intercept + slope (log body mass).

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