| Tt | Testosterone |
| ART | Assisted Reproductive Technology |
| IUCN | International Union for the Conservation of Nature |
| UK | United Kingdom |
| NZ | Newquay Zoo |
| PL | Port Lympne Wild Animal Park |
| SWT | Shaldon Wildlife Trust |
| TH | Thrigby Hall Wildlife Gardens |
| RT | Room temperature |
| CV | Coefficient of variation |
| BCS | Body condition score |
| UC | Urethral catheterization |
| EE | Electro-ejaculation |
| LMM | Linear mixed model |
| AIC | Akaike’s information criterion |
| PELT | Pruned exact linear time |
| CROPS | Changepoint for a range of penalties |
| GLS | Generalised least squares |
| P | Proven |
| NP | Non-proven |