Table 1.
Calcium isotopic data on soft and mineralized tissue samples
| Sample | δ44Ca | ±2 σ |
|---|---|---|
| Horse | ||
| Alfalfa SV (source) | −0.55 | 0.11 |
| Fescue alta (source) | −1.17 | 0.20 |
| Source average | −0.86 | 0.3* |
| Horse muscle | −0.27 | 0.16 |
| Horse blood | −1.47 | 0.20 |
| Horse bone | −2.00 | 0.40 |
| Grouper | ||
| Seawater (source)† | 0.86 | 0.04 |
| Grouper muscle | 0.49 | 0.29 |
| Grouper bone | −0.65 | 0.05 |
| Mytilus | ||
| Seawater (source) | 0.86 | 0.04 |
| Mytilus shell | 0.20 | 0.15 |
| Mytilus mantle fresh | 0.83 | 0.14 |
| Mytilus mantle 12 h | 0.31 | 0.19 |
| Other marine organisms | ||
| Seawater (source) | 0.86 | 0.04 |
| Anchovy pooled bone | 0.14 | 0.18 |
| Barracuda bone | −0.46 | 0.06 |
| Manta teeth | −0.16 | 0.14 |
| Whole squid | 0.69 | 0.23 |
| Sardine bone | −0.55 | 0.09 |
| Northern fur seal | ||
| Whole squid (source) | 0.69 | 0.23 |
| Sardine bone (source) | −0.55 | 0.09 |
| Anchovy bone (source) | 0.14 | 0.18 |
| Source average | 0.09 | 0.3* |
| Fur seal muscle | −0.75 | 0.16 |
| Fur seal blood | −0.22 | 0.17 |
| Fur seal bone | −1.17 | 0.20 |
| Chicken | ||
| Chicken feed | −0.84 | 0.19 |
| Oyster shell (San Francisco bay) | −0.33 | 0.06 |
| Source average (weighted) | −0.67 | 0.2* |
| Egg yolk | −0.09 | 0.13 |
| Egg white | 1.79 | 0.01 |
| Egg shell | −0.78 | 0.14 |
| Chicken B bone | −2.21 | 0.16 |
| Chicken B blood | −1.65 | 0.17 |
| Chicken B muscle | −1.02 | 0.16 |
| Chicken B excrement | −1.14 | 0.10 |
| Chicken B feathers | −0.53 | 0.05 |
| Other | ||
| Cougar bone | −3.14 | 0.16 |
*Estimated uncertainties for dietary values.
† Seawater value is based on unpublished data but is similar to the value of 0.92 ± 0.19 reported in ref. 2.