Table 2

Likelihood ratio test output for each model selected for embryo survival and incubation duration (number of days post-fertilization (DPF) and accumulated degree days (°C; ADD)) from European whitefish (Coregonus spp.) in lakes Constance (littoral and pelagic populations), Geneva, and Bourget. Effects abbreviations: t − treatment, pop − population, block − a group of four males each paired to three females (see Fig. 2). The full model was selected using a backward, stepwise effect-selection and it is bolded for each trait.

Trait Model Effect Tested df χ2 p-value
Embryo Survival t + pop + t:pop + female:male + female + block + plate
  pop + female:male + female + block + plate t 1 377.56 <0.001
  t + female:male + female + block + plate pop 3 4.14 0.246
  t + pop + female:male + female + block + plate t:pop 3 39.79 <0.001
  t + pop + t:pop + female + block + plate female:male 1 14.35 <0.001
  t + pop + t:pop + female:male + block + plate female 1 10.39 0.001
  t + pop + t:pop + female:male + female + plate block 1 27.27 <0.001
  t + pop + t:pop + female:male + female + block plate 1 51.31 <0.001
Incubation Period (DPF) t + pop + t:pop + female:male + female + male + block + plate
  pop + female:male + female + male + block + plate t 1 780.85 <0.001
  t + female:male + female + male + block + plate pop 3 2.19 0.534
  t + pop + female:male + female + male + block + plate t:pop 3 45.53 <0.001
  t + pop + t:pop + female + male + block + plate female:male 1 62.23 <0.001
  t + pop + t:pop + female:male + male + block + plate female 1 3.90 0.048
  t + pop + t:pop + female:male + female + block + plate male 1 7.55 0.006
  t + pop + t:pop + female:male + female + male + plate block 1 11.95 <0.001
  t + pop + t:pop + female:male + female + male + block plate 1 197.62 <0.001
Incubation Period (ADD) t + pop + t:pop + female:male + female + male + block + plate
  pop + female:male + female + male + block + plate t 1 33.21 <0.001
  t + female:male + female + male + block + plate pop 3 1.49 0.686
  t + pop + female:male + female + male + block + plate t:pop 3 51.28 <0.001
  t + pop + t:pop + female + male + block + plate female:male 1 59.13 <0.001
  t + pop + t:pop + female:male + male + block + plate female 1 4.30 0.038
  t + pop + t:pop + female:male + female + block + plate male 1 8.15 0.004
  t + pop + t:pop + female:male + female + male + plate block 1 17.53 <0.001
  t + pop + t:pop + female:male + female + male + block plate 1 199.59 <0.001

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