Table 1.

Absolute values of latency to burrow, duration of burrowing and weight of removed food pellets. Results of paired t-test for latency to burrow and duration of burrowing, and Wilcoxon test for removed pellet weights.

			Mean (h)	SEM (h)	p-Value	t
Latency to burrow	Surgery + anesthesia	Baseline	0.09	0.02	0.0005*	−5.779
		Experimental	10.41	1.79
	Surgery + anesthesia + analgesia	Baseline	1.58	1.02	0.004*	−3.431
		Experimental	7.09	1.66
	Anesthesia	Baseline	0.10	0.04	0.001*	−4.07
		Experimental	5.48	1.32
	Anesthesia + analgesia	Baseline	3.38	0.49	0.081n.s.	−1.871
		Experimental	7.90	2.16
Duration of burrowing	Surgery + anesthesia	Baseline	0.27	0.01	0.193n.s.	−1.387
		Experimental	1.89	0.27
	Surgery + anesthesia + analgesia	Baseline	0.46	0.31	0.148n.s.	1.601
		Experimental	1.63	0.38
	Anesthesia	Baseline	0.45	0.13	0.190n.s.	−1.377
		Experimental	1.85	0.23
	Anesthesia + analgesia	Baseline	0.66	0.08	0.194n.s.	−1.405
		Experimental	3.81	0.37
			Mean (g)	SEM (g)	p-Value	Z-value
Weight of removed food	Surgery + anesthesia	Baseline	134.1	5.9	0.0005*	−3.556
pellets at 2 h		Experimental	10.3	9.3
	Surgery + anesthesia + analgesia	Baseline	134.3	5.7	0.001*	−3.357
		Experimental	35	15.7
	Anesthesia	Baseline	133.2	5.2	0.001*	−3.438
		Experimental	30.4	13.8
	Anesthesia + analgesia	Baseline	86.2	15.4	0.004*	−2.852
		Experimental	33	14.1

* = p < 0.05; n.s. = p > 0.05.