Table 7.
Functions obtained from stepwise discriminant analysis based on the morphometrics of the cranium, mandible, skull and scapula, and classification results for predicting habitat.
| Bone | Variable | Function coefficients | Habitats | Percentage of predictiona | Accuracy | Precision | |
|---|---|---|---|---|---|---|---|
| Andaman Sea | Gulf of Thailand | ||||||
| Cranium | PW/BBC | 10.616 | Andaman Sea | 96.2 | 3.8 | 93.8 | 89.7 |
| PA/CBL | 2.848 | Gulf of Thailand | 16.7 | 83.3 | |||
| PA/CrNL | 0.045 | ||||||
| IW/PH | 9.425 | ||||||
| PAW/ZAL | 21.732 | ||||||
| (Constant) | −35.429 | ||||||
| Mandible | CL/CW | 5.111 | Andaman Sea | 96.8 | 3.2 | 97.3 | 92.8 |
| CL/MAW | −1076.756 | Gulf of Thailand | 0 | 100 | |||
| MIML/MAW | 273.618 | ||||||
| MSW/MAW | −155.062 | ||||||
| CL/MIML | 940.45 | ||||||
| CL/MSW | −187.425 | ||||||
| (Constant) | −111.092 | ||||||
| Skull | CrNL/CRL | 163.055 | Andaman Sea | 100 | 0 | 100 | 100 |
| PA/CRL | −15.284 | Gulf of Thailand | 0 | 100 | |||
| PW/CRW | −105.309 | ||||||
| IH/IW | 173.012 | ||||||
| IW/NCW | 114.274 | ||||||
| NCW/PW | 50.157 | ||||||
| CaPMH/ZPW | 36.154 | ||||||
| PL/ZW | −8.489 | ||||||
| MWM1/BML | −4772.791 | ||||||
| CL/CW | −61.507 | ||||||
| CH/MA1 | 732.804 | ||||||
| MNW/MAW | 1075.451 | ||||||
| MA1/MH | 19.541 | ||||||
| BMW/MIML | −473.96 | ||||||
| MWM1/MNW | 463.435 | ||||||
| ML/MWM1 | −9.99 | ||||||
| (Constant) | 22.908 | ||||||
| Scapula | SNW/SN | 2.352 | Andaman Sea | 76.40 | 23.60 | 73.7 | 61.5 |
| SGH/SN | 3.427 | Gulf of Thailand | 50 | 50 | |||
| (Constant) | −9.510 | ||||||
aCross-validation is done only for those cases in the analysis. In cross-validation, each case is classified by the functions derived from all cases other than that case.