The effects of temperature on nestling growth in a songbird depend on developmental constraints
Fig 5
Temperature effects on the mass of 11–13-day-old nestlings that are the smallest in their brood versus other nestlings.
Predicted relationships of minimum temperature (A), maximum temperature (B), and temperature variability (interquartile range) (C) across the nestling period and nestling mass from linear mixed models, stratified by relative nestling size—the smallest nestling (‘Smallest’, n = 31) and all other nestlings (‘Other’, n = 72)—at days 8–9 post-hatch. Model predictions are displayed as lines, and raw data are displayed as points. Colors, line types, and shapes correspond to the relative nestling size. Because relative nestling size was determined at days 8–9 and some nestlings did not survive to final measures on days 11–13 (n = 2 nestlings that died between days 8–9 and 11–13), only ‘Smallest’ or ‘Other’ nestling points are present for some nests.