Table 2. The results of mixed ANOVAs for three different measures of differential growth rate of the last instar larvae of Ematurga atomaria.
| Effect | NomDF | Ddf | F | P | |
|---|---|---|---|---|---|
| Absolute increments* | Sex | 1 | 1271 | 18.96 | <0.0001 |
| Day | 1 | 4135 | 37.75 | <0.0001 | |
| Plant | 1 | 1271 | 4.45 | 0.035 | |
| Sex:day | 1 | 4135 | 0.013 | 0.91 | |
| Sex:plant | 1 | 1271 | 4.51 | 0.033 | |
| Allometric*** | Sex | 1 | 1271 | 11.08 | 0.0009 |
| Day | 1 | 4135 | 202.58 | < .0.0001 | |
| Plant | 1 | 1271 | 80.41 | < .0.0001 | |
| Sex:day | 1 | 4135 | 0.51 | 0.47 | |
| Sex:plant | 1 | 1271 | 2.39 | 0.12 | |
| Relative** | Sex | 1 | 1271 | 0.124 | 0.72 |
| Day | 1 | 4135 | 847.11 | < .0.0001 | |
| Plant | 1 | 1271 | 68.26 | < .0.0001 | |
| Sex:day | 1 | 4135 | 0.31 | 0.58 | |
| Sex:plant | 1 | 1271 | 1.58 | 0.21 |
The mass increments of 2nd, 3rd, 4th and 5th days within the last instar were treated as repeated measurements on particular individuals. Host plant, sex, day and sex*day were included into the model as fixed factors, and brood (offspring of an individual female) and individual larva (nested in brood) as random factors; type III sum of squares. Removing non-significant interactions from the models did not have a qualitative effect on other statistics.
* Absolute increments represent individual 24h mass increments.
** Relative differential growth rates were calculated as [log10 (mass at the 2nd measurement / mass at the 1st measurement)].
*** Allometric differential growth rates were calculated [the cubic root of mass at 2nd measurement–the cubic root of mass at 1st measurement].