Table 1 Mean and standard deviation (SD) of δ13C and δ15N isotope values of (in‰) in aquatic mammal bone samples.
Species | δ13C | δ15N | |||||||
|---|---|---|---|---|---|---|---|---|---|
N | Mean ± SD | Min | Max | Mean ± SD | Min | Max | |||
Trichechus inunguis | 11 | – | − 19.6 ± 4.1 | − 25.5 | − 12.9 | – | 7.2 ± 0.6 | 6 | 8.1 |
Inia geoffrensis | 7 | – | − 18.7 ± 4.3 | − 23.8 | − 12.5 | – | 12.9 ± 1.4 | 11.6 | 15.3 |
Inia araguaiaensis | 3 | – | − 16.5 ± 3.6 | − 20.6 | − 13.8 | – | 12.9 ± 0.5 | 12.6 | 13.4 |
Delphinus sp. | 2 | − 12.5 | – | – | – | 12.1 | – | – | – |
− 11.4 | – | – | – | 12.4 | – | – | – | ||
Globicephala macrorhynchus | 1 | – | − 13.1 | – | – | – | 11.8 | – | – |
Lagenodelphis hosei | 1 | – | − 13 | – | – | – | 13.3 | – | – |
Grampus griseus | 2 | − 11.9 | – | – | – | 11.5 | – | – | – |
− 13.0 | – | – | – | 14.4 | – | – | – | ||
Peponocephala electra | 2 | − 12.6 | – | – | – | 11.8 | – | – | – |
− 12.9 | – | – | – | 12.1 | – | – | – | ||
Pseudorca crassidens | 1 | – | − 11 | – | – | – | 13.3 | – | – |
Sotalia guianensis (AE) | 188 | – | − 12.9 ± 1.1 | − 16.5 | − 11.1 | – | 11.6 ± 0.9 | 8.3 | 13.9 |
Sotalia guianensis (NC) | 32 | – | − 12.2 ± 0.6 | − 13.7 | − 10.8 | – | 11.5 ± 1.0 | 9.9 | 13.1 |
Stenella attenuata | 2 | − 13.1 | – | – | – | 10.7 | – | – | – |
− 13.3 | – | – | – | 11.2 | – | – | – | ||
Steno bredanensis | 9 | – | − 12.0 ± 0.8 | − 13.1 | − 10.8 | – | 12.2 ± 1.0 | 10.8 | 14 |
Tursiops truncatus | 6 | – | − 11.3 ± 0.7 | − 12.6 | − 10.6 | – | 13.0 ± 1.3 | 10.5 | 14 |
Physeter macrocephalus | 3 | – | − 14.4 ± 1.9 | − 16.6 | − 12.9 | – | 15.4 ± 0.6 | 14.7 | 16 |
