Table 2.

Summary of heteroskedastic regression results for characteristics of pollen provisions provided to offspring and adult body size measurements

	Pollen masses				Adult bees
	Dry weight	Volume	Sugar	Protein	Head width	Dry weight
Significant predictors	Volume, sex, social	Dry weight	Dry weight	Dry weight	Intertegular, sex, intertegular × sex	Sex
Significant differences in variance	Sex	Social, sex × soca	Sex*soc	Sex	Sexa	Sex

Top portion of the table identifies significant predictors of each outcome variable and whether there were significant differences among males and females or solitary and social nests. The bottom portion of the table identifies variables for which variance in the trait was significantly different. See text for model parameters and Z-scores

^aAlthough statistically significant differences were found between social and solitary nests and an interaction between sex and social status for variation in provision mass volume, the estimated variance components were very close to zero, suggesting these differences may not be biologically meaningful. This is also true of differences in variance found between male and female head width