Table 1. Altitude and climatic factors in the four sampling locations of Phrynocephalus vlangalii within the Qinghai-Tibet Plateau (China) and the several phenotypic variables considered in the present study.
| Population | Sex | N | SVL (mm) | Body mass (g) | Heart mass (mg) | Lung mass (mg) | Stomach mass (mg) | Intestinal tract mass (mg) | Altitude (m) | Temperature(°C)a | Air pressure (hPa) a |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Golmud | Males | 12 | 55.38±1.55 | 6.01±0.47 | 8.1±0.8 | 7.6±0.6 | 13.2±1.7 | 11.1±1.1 | 2810 | 5.8 | 724.7 |
| Females | 7 | 53.04±1.28 | 5.60±0.39 | 5.5±0.6 | 5.8±0.6 | 11.0±1.0 | 11.3±0.8 | ||||
| Delingha | Males | 18 | 54.90±1.00 | 6.12±0.33 | 7.9±0.7 (17)b | 7.8±0.7 (17) | 10.7±1.0 (14) | 17.1±1.7 (14) | 2900 | 4.4 | 708.7 |
| Females | 28 | 55.22±0.89 | 8.25±0.40 | 9.8±0.9 | 8.6±0.5 | 16.1±1.7 (14) | 19.8±1.7 (14) | ||||
| Daotanghe | Males | 13 | 54.81±0.57 | 5.74±0.22 | 10.5±1.0 (11) | 10.8±0.6 (11) | 17.1±2.6 (4) | 20.3±3.1 (4) | 3367 | 0.8 | 688.8 |
| Females | 18 | 54.37±0.63 | 6.69±0.36 | 7.6±0.5 | 7.7±0.6 | 15.5±2.7 (6) | 20.6±1.9 (6) | ||||
| Maduo | Males | 19 | 56.05±0.47 | 7.31±0.31 | 10.2±0.8 (13) | 11.4±0.5 (13) | 12.4±1.2 | 18.8±1.5 | 4250 | -3.3 | 604.3 |
| Females | 23 | 56.71±0.68 | 8.59±0.44 | 8.4±0.7 | 9.5±0.5 | 14.5±1.3 (15) | 23.6±3.0 (15) |
SVL, snout to vent length.
a average values based on a 30-year-data series obtained from the National Climatic Data Center, China.
b numbers between brackets indicate sample size; some specimen’s preservation status only allowed collecting data for two organs