Table 5 Comparison of frequency (individual-based) and lesion severity (based on articular surfaces) of TMJ-OA between the two subspecies Phoca v. richardii ([10] and Phoca v. vitulina [this study]. Only juvenile/subadult and adult individuals
| Â | P. v. richardii | P. v. vitulina |
|---|---|---|
Frequency (individuals) | ||
 TMJ-OA yes | 67 (34.5%) | 963 (53.9%) |
 TMJ-OA no | 127 (65.5%) | 824 (46.1%) |
 Total | 194 (100%) | 1787 (100%) |
Stage (articular surfaces) | ||
 Normal | 642 (82.7%) | 4394 (61.5%) |
 Mild | 72 (9.3%) | 1875 (26.2%) |
 Moderate | 38 (4.9%) | 715 (10.0%) |
 Severe | 24 (3.1%) | 164 (2.3%) |
 Total | 776 (100%) | 7148 (100%) |