TABLE 2.
Variable | Population | |||||
---|---|---|---|---|---|---|
Warm | Cool | Cold | ||||
Mean | SE | Mean | SE | Mean | SE | |
Environmental temperature (C) | 18.7 | — | 16.5 | — | 14.3 | — |
Latitude (degrees N) | 32.0 | — | 34.1 | — | 36.4 | — |
Potential activity period (h) | 2629 | — | 2294 | — | 2141 | — |
Snout‐vent length (mm) | 55.6a | 0.91 | 59.7b | 0.89 | 60.6b | 1.89 |
Mass (g) | 6.1 | 0.42 | 8.1 | 0.42 | 9.1 | 0.89 |
Body condition (residuals g/mm) | 7.5a | 0.24 | 7.7ab | 0.17 | 8.4b | 0.24 |
Weekly growth rate (mm) | 0.053a | 0.011 | 0.091ab | 0.015 | 0.109b | 0.009 |
Intrinsic annual growth in mass (g) | 0.719 | — | 1.169 | — | 1.338 | — |
Postovip mass (g) | 4.5 | 0.37 | 5.5 | 0.55 | 6.4 | 0.87 |
Eggs per clutch | 6.9 | 0.68 | 7.4 | 0.63 | 10.0 | 1.07 |
Mean egg mass (g) | 0.2a | 0.01 | 0.3ab | 0.01 | 0.3b | 0.01 |
Clutch mass (g) | 1.7a | 0.16 | 2.1a | 0.20 | 3.2b | 0.42 |
Note: Reported means were calculated from raw data with the exception of body condition with marginal mean values based on residuals from ANCOVA with mass regressed on snout–vent length. Different letter subscripts denote differences between populations based on post hoc pairwise comparisons for significant overall models.