Social structure and Escherichia coli sharing in a group-living wild primate, Verreaux’s sifaka

BMC Ecology

Table 1 Bayesian general linear mixed models testing the influence of several predictor variables on the probability of sharing the same E. coli MLST

Model	Predictor	Posterior mean coefficient	95 % Confidence interval	MCMCglmm P value	Odds ratio^a
A	Intercept	−3.28	−4.4, −2.24	<0.001
(DIC: 402.95)	Same sex	0.05	−0.61, 0.67	0.864	1.05
	Same birth year	−0.5	−2.05, 1.03	0.534	0.6
	Same natal group	0.06	−1.31, 1.22	0.915	1.06
	Same group	1.14	0.02, 2.24	0.044	3.13
	Same sampling month	0.21	−0.47, 0.94	0.552	1.23
	Same sampling method	0.03	−0.86, 0.94	0.926	1.03
B	Intercept	−3.75	−5.4, −2.21	<0.001
(DIC: 243.32)	Same sex	−0.38	−1.18, 0.46	0.366	0.68
	Same birth year	−2	−4.99, 0.54	0.119	0.14
	Same natal group	1.12	−0.86, 3	0.235	3.06
	Space-use sharing (UDOI)	0.13	−0.32, 0.57	0.538	1.14
	Same sampling month	0.66	−0.31, 1.63	0.177	1.93
	Same sampling method	−0.2	−1.35, 0.93	0.727	0.82
C	Intercept	−3.74	−5.21, −2.27	<0.001
(DIC: 243.17)	Same sex	−0.39	−1.23, 0.47	0.347	0.68
	Same birth year	−2.04	−4.87, 0.66	0.107	0.13
	Same natal group	0.95	−1.03, 2.85	0.329	2.59
	Intergroup encounter rate	0.2	−0.24, 0.64	0.346	1.22
	Same sampling month	0.64	−0.33, 1.57	0.190	1.9
	Same sampling method	−0.18	−1.29, 0.98	0.769	0.84

Models B and C included only the 8 neighboring groups and excluded ties within the same social group. UDOI and intergroup encounter rate were z-transformed. Significant P values (<0.05) are printed in italics
^aThe odds ratio is the multiplicative increase in the odds of E. coli strain sharing with each unit increase in the explanatory variable

ISSN: 1472-6785