Intracolonial genetic variation affects reproductive skew and colony productivity during colony foundation in a parthenogenetic termite

Table 2 Effects of social characters on reproductive skew

Response variable	Explanatory variable	Z value	P value
Skew of offspring production	colony type (CT)	1.952	0.051
	founders’ survival rate (FSR)	1.558	0.119
	colony size (CS)	1.141	0.254
	interaction between CT & FSR	−1.738	0.082
	interaction between CT & CS	−1.585	0.113
	interaction between FSR & CS	−1.534	0.125
	interaction between CT, FSR & CS	1.493	0.136
Skew of juvenile production	colony type (CT)	1.482	0.138
	founders’ survival rate (FSR)	0.422	0.673
	colony size (CS)	0.301	0.763
	interaction between CT & FSR	−1.336	0.182
	interaction between CT & CS	−1.365	0.172
	interaction between FSR & CS	−0.342	0.733
	interaction between CT, FSR & CS	1.283	0.199
Skew of worker production	colony type (CT)	1.232	0.218
	founders’ survival rate (FSR)	1.131	0.258
	colony size (CS)	1.232	0.218
	interaction between CT & FSR	−1.434	0.152
	interaction between CT & CS	−1.315	0.189
	interaction between FSR & CS	−1.581	0.114
	interaction between CT, FSR & CS	1.502	0.133
Skew of nymph production	colony type (CT)	1.997	0.046*
	founders’ survival rate (FSR)	−0.230	0.818
	colony size (CS)	0.175	0.861
	interaction between CT & FSR	−1.197	0.231
	interaction between CT & CS	−2.664	0.008**
	interaction between FSR & CS	0.049	0.961
	interaction between CT, FSR & CS	2.152	0.031*
Skew of soldier production	colony type (CT)	−0.001	0.999
	founders’ survival rate (FSR)	0.452	0.651
	colony size (CS)	0.287	0.774
	interaction between CT & FSR	0.001	0.999
	interaction between CT & CS	0	1.000
	interaction between FSR & CS	−0.211	0.833
	interaction between CT, FSR & CS	0	1.000

For the explanatory values, see Table 1. “*” and “**” indicates P < 0.05 and 0.01 in GLMM analyses, respectively. Skew of nymphoids could not be analyzed because of small numbers of colonies producing nymphoids (3 of 13 sister-pair colonies and 3 of 14 unrelated-pair ones, see Additional files 1, 2 and 3).

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