Table 2 Results of model testing the effect of inversion genotype and salinity treatment on the body size measurements.

From: Experimental test of the fitness effects of divergent marine–freshwater chromosomal inversions in stickleback under different salinity conditions

Chromosomal inversion

Predictor

Standard length

Body condition

D.F

Sum. Sq

F-value

p-value

D.F

Sum. Sq

F-value

p-value

Chromosome I

N = 406

Genotype

2, 396

24.96

0.88

0.41

2, 396

0.0055

2.81

0.062

Treatment

1, 398

378.56

26.59

<0.001

1, 397

0.0033

3.41

0.065

Sex

1, 397

72.23

5.07

0.02

1, 396

0.022

22.25

<0.001

Age

1, 164

880.06

61.81

<0.001

1, 379

0.067

69.09

<0.001

Genotype x Treatment

2, 397

3.42

0.12

0.88

2, 396

0.0067

3.47

0.032

Chromosome XI

N = 327

Genotype

2, 317

58.10

1.19

0.31

2, 317

0.0017

0.90

0.41

Treatment

1, 317

626.52

25.61

<0.001

1, 317

0.011

11.93

<0.001

Sex

1, 317

171.60

7.01

0.0085

1, 317

0.051

55.74

<0.001

Age

1, 319

267.11

10.92

0.0011

1, 319

0.0086

9.35

0.0024

Genotype x Treatment

2, 317

60.11

1.23

0.29

2, 317

0.0011

0.60

0.54

Chromosome XXI

N = 384

Genotype

2, 374

69.86

2.33

0.099

2, 374

0.0016

0.73

0.48

Treatment

1, 374

422.30

28.13

<0.001

1, 375

0.0036

3.21

0.074

Sex

1, 374

171.31

11.41

<0.001

1, 375

0.049

43.85

<0.001

Age

1, 375

102.78

6.85

0.0092

1, 374

0.022

19.52

<0.001

Genotype x Treatment

2, 374

12.73

0.42

0.65

2, 374

0.00017

0.076

0.93

  1. Results from the associated type III ANOVA calculated with the Satterthwaite's method on the linear mixed models for standard length and body condition at the three chromosomal inversions. Genotype does not influence standard length or body condition across the three chromosomal inversions. Treatment, sex, and age influence body size measurements across all inversions, except for no effect on body condition from treatment at the chromosome I and XXI inversions. The interaction between treatment and genotype at chromosome I inversion influences body condition. Body condition is the residual of the linear model between standard length and weight. For a visual representation of this data, see Fig. 3. D.F = degrees of freedom; Sum. Sq. = sum of squares. Significant p-values (<0.05) are highlighted in bold.
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