Table 3. Age of deposition of the external fundamental system (EFS) in the limb bones of adult kulans and time of several biological traits in equids obtained from the literature.
Age of epiphyseal fusion (Silver, 1969) is indicated for the closely related species Equus caballus while age at sexual maturity (Nowak, 1999) and age at first reproduction (Kaczensky et al., 2015) is reported for Equus hemionus. All data are expressed in years.
| EFS | Epiphyseal fusion | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| F | T | Mc | Mt | F | T | Mc | Mt | Sexual maturity | Age at first reproduction | |
| Female | 4 | − | 3 | 3 | 3–3.5 | 3–3.5 | 1.25–1.5 | 1.3–1.6 | 2 | 3 |
| Male | 6 | – | 4 | 4 | 3–3.5 | 3–3.5 | 1.25–1.5 | 1.3–1.6 | 3 | 5 |
Notes.
- F
- femur
- T
- tibia
- Mc
- metacarpus
- Mt
- metatarsus