TABLE 1.

Model set for response variables^a

Variables in the model	Kb for models B and C	AIC for model:			K for models A, D, and E	AIC for model:
		A	B	C		D	E
Null model	2	1,148	798	14,745	1	15,127	2,526
Source	3	1,148	772	14,726	2	13,894	2,381
Bacteria	3	1,124	782	14,742	2	11,685	2,013
Worm	3	1,150	790	14,745	2	9,478	2,377
Source + Bacteria	4	1,124	749	14,722	3	10,906	1,712
Source × Bacteria	5	1,124	743	14,724	4	9,876	1,664
Source × Bacteria + Worm	6	1,126	737	14,724	5	8,261	1,511
Source × Bacteria + Source × Worm	7	1,126	737	14,725	6	8,196	1,512
Source × Bacteria + Source × Worm + Bacteria × Worm	8	1,128	738	14,727	7	7,862	1,469
Source × Bacteria × Worm	9	1,130	738	14,725	8	6,530	1,440

^aResponse variables: A, fertility of the mother; B, number of colonized worms; C, bacterial load in the progeny; D, number of bacteria in plate; E, bacterial load in the mother. The best model for each data set is shown in boldface.

^bK, number of parameters. For models B and C, plate is included as a random effect (see Materials and Methods).