The Company of Biologists

Table 3.

Parameter estimates for the line logY = loga + b logX

Y	X	Family (N)	log a (±s.e.m.)	b (±s.e.m.)	log a^c (±s.e.m.)	b^c (±s.e.m.)
Jaw muscle mass	Body mass	Estrildidae (20)	0.67(±0.24)^{^*}	1.26(±0.21)^{^***}	0.63(±0.03)^{^**}	1.29(±0.10)^{^***}
		Fringillidae (16)	0.78(±0.14)^{^***}	1.31(±0.10)^{^***}	0.81(±0.24)^{^***}	1.29(±0.10)^{^***}
Maximal bite force	Body mass	Estrildidae (19)	—0.98(±0.24)^{^**}	1.26(±0.20)^{^***}	—1.19(±0.03)^{^***}	1.44(±0.13)^{^***}
		Fringillidae (12)	—1.19(±0.21)^{^***}	1.55(±0.15)^{^***}	—1.04(±0.04)^{^***}	1.44(±0.13)^{^***}
Maximal bite force	Jaw muscle mass	Estrildidae (19)	—1.36(±0.31)^{^***}	0.87(±0.14)^{^***}	—1.75(±0.03)^{^***}	1.05(±0.09)^{^***}
		Fringillidae (12)	—2.12(±0.20)^{^***}	1.19(±0.80)^{^***}	—1.78(±0.03)^{^***}	1.05(±0.09)^{^***}
Adductor fibre length	Body mass	Fringillidae (10)	—0.26(±0.07)^{^**}	0.26(±0.05)^{^***}	—	—

Y	X	Family (N)	log a (±s.e.m.)	b (±s.e.m.)	log a^c (±s.e.m.)	b^c (±s.e.m.)
Jaw muscle mass	Body mass	Estrildidae (20)	0.67(±0.24)^{^*}	1.26(±0.21)^{^***}	0.63(±0.03)^{^**}	1.29(±0.10)^{^***}
		Fringillidae (16)	0.78(±0.14)^{^***}	1.31(±0.10)^{^***}	0.81(±0.24)^{^***}	1.29(±0.10)^{^***}
Maximal bite force	Body mass	Estrildidae (19)	—0.98(±0.24)^{^**}	1.26(±0.20)^{^***}	—1.19(±0.03)^{^***}	1.44(±0.13)^{^***}
		Fringillidae (12)	—1.19(±0.21)^{^***}	1.55(±0.15)^{^***}	—1.04(±0.04)^{^***}	1.44(±0.13)^{^***}
Maximal bite force	Jaw muscle mass	Estrildidae (19)	—1.36(±0.31)^{^***}	0.87(±0.14)^{^***}	—1.75(±0.03)^{^***}	1.05(±0.09)^{^***}
		Fringillidae (12)	—2.12(±0.20)^{^***}	1.19(±0.80)^{^***}	—1.78(±0.03)^{^***}	1.05(±0.09)^{^***}
Adductor fibre length	Body mass	Fringillidae (10)	—0.26(±0.07)^{^**}	0.26(±0.05)^{^***}	—	—

P≤0.05

P≤0.01

***

P≤0.001; log a and b are estimates for estrildids or fringillids separately; log a^c is an estimate for a common slope, b^c, for estrildids and fringillids together, only done if there are no significant differences between fringillids and estrildids

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