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).

variableprobability of successnumber of fledglings (per capita)
d.f.χ2pd.f.Fp
group size15.120.0241,674.340.041
nest site17.840.0051,6710.050.002
group size × nest site14.620.0321,676.230.015