TABLE 2A.

Influence of main factors strain and sex on the respective traits reported as F-values and partial Eta squared.

Trait	Body mass			Age			Strain			Sex			Strain*sex
	F	p	${\mathrm{\eta }}_p^2$	F	p	${\mathrm{\eta }}_p^2$	F	p	${\mathrm{\eta }}_p^2$	F	p	${\mathrm{\eta }}_p^2$	F	p	${\mathrm{\eta }}_p^2$
Feeding	2.12	0.15	0.004	2.68	0.10	0.005	12.53	1.2E-44	0.382	4.91	0.027	0.008	1.17	0.25	0.055
Drinking	0.22	0.64	0.000	0.08	0.78	0.000	8.81	1.2E-30	0.304	0.00	0.95	0.000	0.83	0.73	0.039
Fine movements	0.56	0.46	0.001	0.29	0.59	0.000	22.33	7.1E-77	0.517	3.76	0.053	0.006	1.98	0.0018	0.087
Amb. movements	0.04	0.85	0.000	0.10	0.75	0.000	32.51	1.2E-103	0.610	25.86	4.9E-07	0.041	2.79	2.6E-6	0.118
Rearing	3.64	0.057	0.006	0.00	0.98	0.000	25.54	3.2E-85	0.557	42.77	1.3E-10	0.068	3.49	5.3E-9	0.146
RER	5.81	0.016	0.010	0.02	0.90	0.000	7.39	4.3E-25	0.263	0.58	0.45	0.001	2.15	5.4E-4	0.094
EE	54.54	5.2E-13	0.084	0.74	0.39	0.001	13.04	1.2E-46	0.388	2.28	0.13	0.004	0.67	0.90	0.032
Cage temperature	4.08	0.044	0.007	2.76	0.10	0.005	7.28	1.1E-24	0.257	13.24	2.9E-4	0.021	1.53	0.038	0.068
Body weight	–	–	–	86.91	2.1E-19	0.125	681.00	2.2E-101	0.527	207.30	7.5E-294	0.908	2.90	9.8E-7	0.121

Body mass and age were registered as covariates in the RM-ANCOVA (for photo- and subsequent scotophase). As for body mass, age was the sole covariate in univariate ANCOVA. “p,” p-value; “F,” F-value; “η,” partial Eta squared. Note that the largest effect of age and sex occurred on body weight. The largest sex effect occurred for rearing. EE, average energy expenditure (kcal/h). P-values < 0.05 are highlighted in bold.