Table 4.
Components of pre-natal allocation.
| Estimate ± SE | F | df | P | |
|---|---|---|---|---|
| (A) Effects on egg mass. | ||||
| Treatment | .51 | 1, 36.5 | .480 | |
| Experimentala | −.127 ± .323 | |||
| Time | .76 | 1, 21.6 | .393 | |
| Pre-injectionb | −.162 ± .114 | |||
| Treatment × time | .176 ± .170 | 1.07 | 1, 21.8 | .312 |
| Relative egg-laying order | .860 ± .070 | 154.81 | 1, 287 | < .001 |
| Maternal body mass | .085 ± .103 | .68 | 1, 52.4 | .412 |
| Intercept | −.532 ± .227 | |||
| (B) Effects on egg-yolk massc. | ||||
| Treatment | 3.47 | 1, 31.9 | .072 | |
| Experimentala | 1.037 ± .322 | |||
| Time | 5.74 | 1, 26.3 | .024 | |
| Pre-injectionb | −.185 ± .238 | |||
| Treatment × time | 1.201 ± .347 | 11.97 | 1, 26.3 | .002 |
| Relative egg-laying order | .209 ± .119 | 3.09 | 1, 285 | .080 |
| Maternal body mass | .068 ± .111 | .37 | 1, 44.4 | .547 |
| Intercept | .131 ± .299 | |||
| (C) Effects on yolk corticosterone. | ||||
| Treatment | 7.95 | 1, 34.8 | .008 | |
| Experimentala | 1.174 ± .324 | |||
| Time | 7.06 | 1, 27.6 | .013 | |
| Pre-injectionb | −.974 ± .239 | |||
| Treatment × time | 1.018 ± .350 | 8.44 | 1, 27.7 | .007 |
| Relative egg-laying order | .171 ± .123 | 1.94 | 1, 259 | .165 |
| Maternal body mass | .065 ± .108 | .36 | 1, 44.6 | .551 |
| Intercept | .823 ± .229 | |||
| (D) Effects on yolk testosterone. | ||||
| Treatment | 2.03 | 1, 36 | .163 | |
| Experimentala | .410 ± .309 | |||
| Time | 2.69 | 1, 22 | .115 | |
| Pre-injectionb | −.123 ± .104 | |||
| Treatment × time | −.005 ± .154 | .00 | 1, 22 | .973 |
| Relative egg-laying order | .593 ± .121 | 24.16 | 1, 284 | < .001 |
| Maternal body mass | −.041 ± .097 | .18 | 1, 45 | .673 |
| Intercept | −.060 ± .225 | |||
a
relative to control females,
b
relative to post-injection eggs,
c
while controlling for egg mass (i.e., relative egg-yolk mass)