Table 4.
The trophic position of chub and crayfish, as measured by the perpendicular distance from a linear regression fitted to six basal resources (sloping isotope baseline) to the consumer δ15N value
| River | Group | Baseline corrected δ15N (‰) | |
|---|---|---|---|
| Mean | ±95 % CI | ||
| Rother | |||
| Uninvaded | Small chub | 4.54 | 0.48 |
| Large chub | 4.69 | 0.44 | |
| Invaded | Small chub | 5.14 | 1.27 |
| Large chub | 5.46 | 0.47 | |
| Crayfish | 4.35 | 0.30 | |
| Chad Brook | |||
| Uninvaded | Small chub | 5.53 | 1.36 |
| Large chub | 5.58 | 0.38 | |
| Invaded | Small chub | 4.74 | 0.26 |
| Large chub | 5.52 | 0.48 | |
| Crayfish | 5.48 | 0.30 | |