Table 1. Reproductive parameters and SMI of blue and great tits originating from a nest containing a Salmonella positive eggshell.
| Forest fragment | Plot | Nest Box number |
Bird species | Egg volume (mm3) | Clutch size | n° nestlings | n° fledglings | Mean SMI ± stdev |
|---|---|---|---|---|---|---|---|---|
| Aelmoeseneiebos (Melle) | 22 | 22.3 | PC | 7602.914 | 11 | 9 | 8 | NC |
| Borsbeke (Herzele) | 30 | 30.2 | PC | 5445.613 | 12 | 10 | 7 | 10.43 ± 0.66 |
| Serskamp | 36 | 36.2 | PC | 6283.4 | 9 | 8 | 6 | 11.05 ± 0.97 |
| Oud smetlede | 40 | 40.1 | PM | 10254.51 | 8 | 0 | 0 | NA |
| Moortelbos (Oosterzele) | 50 | 50.1 | PC | NC | 7 | 6 | 0 | NA |
| Ooidonk (Deinze) | 52 | 52.2 | PM | 10254.51 | 10 | 8 | NC | NC |
| Ooidonk (Deinze) | 53 | 53.4 | PM | 12742.74 | 7 | NC | 4 | 16.84 ± 0.88 |
Shown is the egg volume of the Salmonella positive eggs of blue (PC) and great (PM) tits, found in 53 analyzed plots. Per positive nest box, the clutch size, number of nestlings, number of fledglings and the brood reduction (number of nestlings–number of fledglings) are given, as well as the mean scaled-mass index (SMI) ± stdev of the nestlings. Due to practical issues, some samples were not collected (NC). If the number of fledglings was equal to 0, brood reduction and SMI could not be calculated (not applicable or NA).