Table 2.

Final linear mixed models testing the effects of group size (two-pair versus three-pair) and nest-site type (shore versus emergent) on the probability of nest success and on the per capita number of young fledged. Other model terms and interactions were not significant (see §2 for details of full model).

variable	probability of success			number of fledglings (per capita)
	d.f.	χ2	p	d.f.	F	p
group size	1	5.12	0.024	1,67	4.34	0.041
nest site	1	7.84	0.005	1,67	10.05	0.002
group size × nest site	1	4.62	0.032	1,67	6.23	0.015