Table 2.
Trophic niche indicators for tissues and populations. TA: total area of the isotopic niche; SEA: standard ellipse area; SEAC: corrected standard ellipse area; WIC/TNW: within-individual component/total niche width of a population, indicating the degree of individual specialization
| TA (‰2) | SEA (‰2) | SEAC (‰2) | WIC/TNW | |
|---|---|---|---|---|
| Tissue | ||||
| Muscle | 9.70 | 2.30 | 2.36 | – |
| Bone collagen | 19.61 | 5.38 | 5.52 | – |
| Population | ||||
| Lueyang | 2.54 | 1.20 | 1.34 | 0.33 |
| Pingwu | 0.19 | 0.24 | 0.36 | 0.36 |
| Chongzhou | 0.70 | 0.44 | 0.52 | 0.57 |
| Wulong | 0.15 | 0.11 | 0.13 | 0.48 |
| Xishui | 1.20 | 0.98 | 1.23 | 0.80 |
| Shizhu | 1.42 | 0.81 | 0.94 | 0.12 |