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Table 3.

Regression against body mass of organelle volume and surface area in red muscle fibres

Equation Y=aWbCoefficient of determination (R2)Standard error of the slope (b)P-value
V(myo,f) 160.450W 0.085 0.799 0.016 0.0012 
V(nuc,f) 3.162W–0.009 0.081 0.001 0.4585 
V(mitimf,f) 51.308W0.016 0.308 0.009 0.1208 
V(mitss,f) 58.203W0.018 0.250 0.012 0.1704 
V(mit,f) 113.610W0.031 0.233 0.021 0.1878 
V(lipimf,f) 1.397W0.002 0.148 0.001 0.3059 
V(lipss,f) 0.940W0.001 0.150 0.001 0.3033 
V(lip,f) 2.339W0.003 0.160 0.002 0.2865 
V(sarimf,f) -2.589W0.034 0.762 0.007 0.0021 
V(sarss,f) 13.197W0.015 0.343 0.008 0.0973 
V(sar,f) 10.607W0.049 0.672 0.013 0.0068 
S(mitimf,f) 214.442W0.078 0.378 0.038 0.0778 
S(mitss,f) 247.287W0.074 0.228 0.051 0.1934 
S(mit,f) 461.731W0.151 0.314 0.0084 0.1164 
S(lipimf,f) 8.449W0.005 0.078 0.006 0.4665 
S(lipss,f) 9.653W–1.598×10–4 1.544×10–4 0.005 0.9747 
S(lip,f) 18.107W0.005 0.025 0.011 0.6843 
Equation Y=aWbCoefficient of determination (R2)Standard error of the slope (b)P-value
V(myo,f) 160.450W 0.085 0.799 0.016 0.0012 
V(nuc,f) 3.162W–0.009 0.081 0.001 0.4585 
V(mitimf,f) 51.308W0.016 0.308 0.009 0.1208 
V(mitss,f) 58.203W0.018 0.250 0.012 0.1704 
V(mit,f) 113.610W0.031 0.233 0.021 0.1878 
V(lipimf,f) 1.397W0.002 0.148 0.001 0.3059 
V(lipss,f) 0.940W0.001 0.150 0.001 0.3033 
V(lip,f) 2.339W0.003 0.160 0.002 0.2865 
V(sarimf,f) -2.589W0.034 0.762 0.007 0.0021 
V(sarss,f) 13.197W0.015 0.343 0.008 0.0973 
V(sar,f) 10.607W0.049 0.672 0.013 0.0068 
S(mitimf,f) 214.442W0.078 0.378 0.038 0.0778 
S(mitss,f) 247.287W0.074 0.228 0.051 0.1934 
S(mit,f) 461.731W0.151 0.314 0.0084 0.1164 
S(lipimf,f) 8.449W0.005 0.078 0.006 0.4665 
S(lipss,f) 9.653W–1.598×10–4 1.544×10–4 0.005 0.9747 
S(lip,f) 18.107W0.005 0.025 0.011 0.6843 

V, organelle volume; S, surface area

Y is the parameter examined, a is a normalisation constant (the value of the y-axis intercept), W is the body mass (g) and b is the scaling exponent (slope of the regression line)

NB: V=Vv×f=μm3μm–3×μm2=μm2; S=Sv×f=μm2.μm–3×μm2=μm

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