TABLE 1.

Results of likelihood ratio tests evaluating the effect of collection site on three hatchling variables: age, stage, and mass at hatching.

Dependent variable a	χ 2	p
Ambystoma annulatum
Age	44.32	1.3 × 10−9
Stage	23.89	2.6 × 10−5
Mass	44.15	1.4 × 10−9
Ambystoma opacum
Age	8.66	.034
Stage	8.18	.042
Mass	5.51	.14

Note: There were four collection sites for ringed salamanders (A. annulatum) and three for marbled salamander (A. opacum) species, but the two collection dates from one site (Pulaski County) were separated in these analyses. The likelihood ratio test statistic approximately χ ² with one degree of freedom, so χ ² and associated probabilities are reported here. Although treatment effects were included in these models, their importance is evaluated in more complete models, reported in Table 2.

^a Full model took the form y = site + treatment + (1|clutch).