TABLE 5.

Summary of a standardized major axis regression (sma) used to fit the metabolic scaling relations between ln (VCO2) and ln (mass) to test for effects of sex on metabolic rate (MR).

Season, trait	Population	Sex	H0: Equal slopes slope (95% CI)1	H0: no elevation difference Y‐intercept (95% CI)2
Summer, resting MR	N. American		LR = 0.006, df = 1, p = .93	Wald = 2.82, df = 1, p = .09
			Common slope: 3.17 (2.56, 3.92)
		Male		0.75 (0.45, 1.06)
		Female		0.79 (0.50, 1.08)
	Costa Rica		LR = 0.64, df = 1, p = .42	Wald = 0.14, df = 1, p = .70
			Common Slope: 2.81 (2.30, 3.46)
		Male		0.53 (0.28, 1.79)
		Female		0.55 (0.29, 0.81)
Autumn, resting MR	N. American		LR = 1.11, df = 1, p = .29	Wald = 0.11, df = 1, p = .73
			Common slope: 3.59 (2.80, 4.52)
		Male		0.98 (0.60, 1.36)
		Female		1.01 (0.64, 1.37)
	Costa Rica		LR = 0.13, df = 1, p = .71	Wald = 0.23, df = 1, p = .63
			Common Slope: 2.79 (2.12, 3.67)
		Male		0.80 (0.40, 1.20)
		Female		0.77 (0.36, 1.17)
Summer, max flight MR	N. America		LR = 0.17, df = 1, p = .67	Wald = 3.79, df = 1, p = .09
			Common slope: 2.06 (1.64, 2.58)
		Male		1.90 (1.69, 2.12)
		Female		1.80 (1.61, 1.99)
	Costa Rica		LR = 0.64, df = 1, p = .42	Wald = 2.73, df = 1, p = .85
			Common slope: 2.31 (1.78, 2.99)
		Male		2.03 (1.74, 2.32)
		Female		1.92 (1.65, 2.19)
Autumn, max flight MR	N. America		LR = 2.743, df = 1, p = .09)	Wald = 0.07, df = 1, p = .78
			Common slope: 1.90 (1.42, 2.58)
		Male		1.84 (1.59, 2.09)
		Female		1.83 (1.59, 2.06)
	Costa Rica		LR = 0.03, df = 1, p = .84	Wald = 0.2.28, df = 1, p = .13
			Common slope: 3.00 (2.00, 4.47)
		Male		2.50 (1.87, 3.13)
		Female		2.32 (1.67, 2.98)