Table 2.
Ordinary least square regressions on perch characteristics of Agamid lizards in relation to diel phase (reference: active phase). Models for perch height and distance to trunk include trunk girth as covariate for arboreal and semi-arboreal species, where β is partial coefficient for diel phase. Mean values are based on observed data (in mm). Model for Sitana marudhamneydhal is not reported as observations did not show any variation. *Homogeneity of variance assumption violated according to Levene’s test of model residuals
| Characteristics | Habitat | Species | Mean Active (SE) | Mean Sleep (SE) | β | SE | df | p-value | R2 |
|---|---|---|---|---|---|---|---|---|---|
| Perch height | Arboreal | Salea anamallayana | 1060 (104.93) | 1360 (118.44) | 0.12 | 0.06 | 47 | 0.04 | 0.06 |
| Salea horsfieldii | 1169.62 (99.49) | 1095.47 (71.45) | –0.04 | 0.06 | 66 | 0.57 | 0 | ||
| Semi-arboreal | Calotes versicolor* | 924.51 (133.49) | 987.96 (97.69) | 0.18 | 0.10 | 49 | 0.085 | 0.08 | |
| Monilesaurus rouxii* | 984.09 (98.87) | 1699.81 (86.07) | 0.20 | 0.07 | 45 | 0.004 | 0.39 | ||
| Rupicolous | Psammophilus dorsalis | 816.56 (138.03) | 1279.14 (160.69) | 0.34 | 0.19 | 35 | 0.825 | 0.06 | |
| Ground | Sarada superba | 29.96 (12.18) | 0 | –0.51 | 0.27 | 37 | 0.072 | 0.06 | |
| Sitana visiri* | 128.5 (31.12) | 0 | –0.96 | 0.23 | 62 | < 0.001 | 0.21 | ||
| Sitana marudhamneydhal | - | - | - | - | - | - | - | ||
| Trunk girth | Arboreal | S. anamallayana | 47.58 (4.81) | 42.53 (3.35) | –0.05 | 0.04 | 48 | 0.249 | 0.01 |
| S. horsfieldii | 64.74 (12.97) | 34.45 (2.59) | –0.20 | 0.06 | 67 | < 0.001 | 0.15 | ||
| Semi-arboreal | C. versicolor | 512.14 (74.99) | 323.04 (49.4) | –0.20 | 0.09 | 50 | 0.035 | 0.07 | |
| M. rouxii | 1055.95 (180.36) | 148.03 (38.74) | –0.90 | 0.12 | 46 | < 0.001 | 0.54 | ||
| Distance to trunk | Arboreal | S. anamallayana | 308 | 343.80 (66.63) | –0.10 | 0.22 | 47 | 0.65 | 0.03 |
| (48.76) | |||||||||
| S. horsfieldii* | 286.40 (51.99) | 290.23 (55.36) | –0.44 | 0.28 | 66 | 0.115 | 0.03 | ||
| Semi-arboreal | C. versicolor | 624.96 (137.63) | 502.6 (96.79) | 0.11 | 0.25 | 49 | 0.664 | 0 | |
| M. rouxii | 30.90 (21.35) | 1117.57 (149.92) | 2.49 | 0.31 | 44 | < 0.001 | 0.70 |