## Table 2 |
||||||

Likelihood ratio tests comparing generalized linear mixed models |
||||||

Effect tested |
Fixed effects |
Random effects |
AIC |
X^{2} |
d.f. |
p |

a) | ||||||

P, L, P×L |
C, P |
2149 |
||||

Capsule (C) | P, L, P×L | P | 2350 | 203.1 | 1 | < 0.001 |

Position (P) | P, L, P×L | C | 2169 | 21.8 | 1 | < 0.001 |

Population × | P, L |
C, P |
2131 | 14.2 | 16 | 0.58 |

Location (P×L) | ||||||

Population (P) | L | C, P | 2135 | 12.1 | 4 | 0.017 |

Location (L) | P | C, P | 2400 | 277.4 | 4 | < 0.001 |

b) | ||||||

P, L, P×L |
C, P |
936 |
||||

Capsule (C) | P, L, P×L | P | 1061 | 126.9 | 1 | < 0.001 |

Position (P) | P, L, P×L |
C |
934 | 0.1 | 1 | 0.78 |

Population × | P, L |
C |
935 | 9.2 | 4 | 0.055 |

Location (P×L) | ||||||

Population (P) | L | C | 943 | 15.8 | 4 | 0.003 |

Location (L) | P | C | 942 | 8.3 | 1 | 0.004 |

(GLMMs) on the effects of population origin, rearing location, position in capsule, and capsule number on a) embryo survival and b) hatching rate among survivors within the locations Giesse and Worble only (because hatching rates or survival were too low in the other populations). Akaikes information criterion (AIC) describes the quality of fit of each model. To evaluate the significance of fixed and random effects, alternative models without the variable of interest were compared to the full model (bold) using likelihood ratio tests. If an alternative model had a significantly better fit (bold), this model was subsequently compared against further reduced models.

Stelkens * et al.*

Stelkens * et al.* *BMC Evolutionary Biology* 2012 **12**:247 doi:10.1186/1471-2148-12-247