Table 1. Body sizes of black-necked gartersnakes (Thamnophis cyrtopsis) in Sabino Canyon Recreation Area, Tucson, Arizona, 2018–2021.
| Age class, sex | SVL (mm) | Mass (g) | BCI |
|---|---|---|---|
| Adult, female (n = 6) | 498 ± 51 | 49.2 ± 13.5 | 0.623 ± 0.039 |
| Adult, male (n = 8) | 468 ± 24 | 49.4 ± 12.4 | 0.630 ± 0.038 |
| Adults* (n = 15) | 481 ± 38 | 49.0 ± 11.9 | 0.626 ± 0.036 |
| Immature, unsexed (n = 3) | 345 ± 64 | 15.3 ± 5.4 | 0.456 ± 0.074 |
| Neonates, unsexed (n = 7) | 198 ± 20 | 3.7 ± 1.1 | 0.252 ± 0.053 |
Notes:
*
Includes both sexes and one unsexed individual.
SVL, snout-vent length in millimeters; BCI, Relative body condition index is log of mass divided by log of SVL; see Stevenson & Woods (2006). Units are mean ±1 standard deviation.