Table 2.
Results from General Linear Models (GLM) and PERMANOVAs with antimicrobial activity (average values of the width of antagonistic halos when tested against each of the nine indicator bacteria), antimicrobial range (Shannon index of the antimicrobial activity), bacterial density and the antimicrobial profile as dependent variables.
| General Linear Models (GLM) | PERMANOVA | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Antimicrobial activity | Antimicrobial range | Bacterial density | Antimicrobial profile | |||||||||
| F | df | P | F | df | p | F | df | p | Pseudo-F | df | p | |
| Species | 4.14 | 8,173 | <0.001 | 9.17 | 8,173 | <0.001 | 6.89 | 8,164 | <0.001 | 3.7 | 8,165 | <0.001 |
| Age | 35.19 | 1,173 | <0.001 | 12.87 | 1,173 | <0.001 | 52.97 | 8,164 | <0.001 | 9.56 | 1,165 | <0.001 |
| Species*Age | 1.86 | 8,165 | 0.07 | 3.7 | 8,165 | <0.001 | 2.89 | 8,156 | 0.005 | 1.61 | 8,165 | 0.003 |
Species identity and age (nestlings vs. adults) were used as the independent factors. The interaction between species identity and age was explored in separate models that also included main effects. Values in bold are statistically significant.