Table 1.

Summary of generalized linear model results [degrees of freedom (d.f.), chi-square (χ²) statistic, and corresponding P-value (P)] for water loss rate (WLR in mg/h), body water content (BWC in mg), and body lipid content (BLC in mg) as dependent variables, initial body mass as a continuous predictor and relative humidity, temperature, or temperature and relative humidity interaction effect (indicated with ×) as independent variables.

Species	Trait	Parameter	d.f.	χ2	P
G. brevipalpis	WLR	Body mass	1	349.51	<0.0001
		Humidity	2	165.44	<0.0001
		Temperature	2	133.94	<0.0001
		Humidity × temperature	4	22.32	0.0002
	BWC	Body mass	1	5857.33	<0.0001
		Humidity	2	21.11	<0.0001
		Temperature	2	20.44	<0.0001
		Humidity × temperature	4	23.66	<0.0001
	BLC	Body mass	1	129.78	<0.0001
		Humidity	2	38.37	<0.0001
		Temperature	2	100.56	<0.0001
		Humidity × temperature	4	55.55	<0.0001
G. m. centralis	WLR	Body mass	1	146.91	<0.0001
		Humidity	2	77.31	<0.0001
		Temperature	2	30.59	<0.0001
		Humidity × temperature	4	55.07	<0.0001
	BWC	Body mass	1	5859.05	<0.0001
		Humidity	2	2.07	0.3551
		Temperature	2	33.03	<0.0001
		Humidity × temperature	4	17.53	0.0015
	BLC	Body mass	1	75.62	<0.0001
		Humidity	2	5.8	0.055
		Temperature	2	4.33	0.1146
		Humidity × temperature	4	8.36	0.0791
G. pallidipes	WLR	Body mass	1	51.16	<0.0001
		Humidity	2	127.17	<0.0001
		Temperature	2	84.35	<0.0001
		Humidity × temperature	4	4.56	0.3353
	BWC	Body mass	1	760.58	<0.0001
		Humidity	2	14.72	0.0006
		Temperature	2	75.75	<0.0001
		Humidity × temperature	4	217.32	<0.0001
	BLC	Body mass	1	32.33	<0.0001
		Humidity	2	13.7	0.0011
		Temperature	2	114.64	<0.0001
		Humidity × temperature	4	74.53	<0.0001
G. palpalisgambiensis	WLR	Body mass	1	212.77	<0.0001
		Humidity	2	90.43	<0.0001
		Temperature	2	91.99	<0.0001
		Humidity × temperature	4	205.29	<0.0001
	BWC	Body mass	1	13473.6	<0.0001
		Humidity	2	41.64	<0.0001
		Temperature	2	20.95	<0.0001
		Humidity × temperature	4	123.26	<0.0001
	BLC	Body mass	1	38.01	<0.0001
		Humidity	2	0.89	0.642
		Temperature	2	32.27	<0.0001
		Humidity × temperature	4	7.54	0.1099

Traits were measured for G. brevipalpis (mesic), G. morsitans centralis (xeric), G. pallidipes (xeric), and G. palpalis gambiensis (mesic). Non-significant effects are indicated in bold.