Table 3.
PGLS of CatSper1 length in relation to sperm velocity parameters
| Dependent variable | Predictor | n | d.f. | Slope | R 2 | F | P | λ a | P (λ=0) b | P (λ=1) b | ES c | CL (-) d | CL (+) d |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| VCL |
Sequence length |
11 |
9 |
-0.975 |
0.512 |
1.966 |
0.191 |
0.754 |
0.066 |
0.362 |
0.430 |
-0.223 |
1.083 |
| VSL |
Sequence length |
11 |
9 |
-2.375 |
0.216 |
10.480 |
0.0089** |
0.667 |
0.186 |
0.103 |
0.898 |
0.245 |
1.551 |
| VAP |
Sequence length |
11 |
9 |
-2.003 |
0.164 |
8.340 |
0.016* |
0.556 |
0.329 |
0.110 |
0.818 |
0.165 |
1.472 |
| ALH |
Sequence length |
11 |
9 |
0.044 |
0.201 |
2.265 |
0.159 |
0.528 |
0.943 |
0.188 |
0.483 |
-0.21 |
1.176 |
| LIN |
Sequence length |
11 |
9 |
-0.016 |
0.785 |
32.795 |
0.003*** |
0 |
1 |
0.039 |
1.402 |
0.709 |
2.095 |
| STR |
Sequence length |
11 |
9 |
-0.009 |
0.626 |
15.06 |
0.001*** |
0.66 |
0.175 |
0.161 |
1.074 |
0.381 |
1.767 |
| BCF |
Sequence length |
11 |
9 |
0.016 |
0.009 |
0.085 |
0.919 |
1 |
0.001 |
1 |
0.097 |
-0.595 |
0.789 |
| Overall Sperm Velocity | Sequence length | 11 | 9 | -0.195 | 0.475 | 10.03 | 0.005** | 0.652 | 0.128 | 0.154 | 0.920 | 0.227 | 1.613 |
P values < 0.05 (*), < 0.01 (**) and < 0.005 (***) indicate statistical significance.
aλ value indicates phylogenetic effect.
bSignificance of log-likelihood ratios for λ against models with λ = 0 and λ = 1 are shown. Statistically significant values are shown in bold.
cEffect size (ES) calculated from the F-values.
dNoncentral 95% confidence limits (CL). Confidence intervals excluding 0 indicate statistically significant relationships and are shown in bold.
VCL, Curvilinear velocity; VSL, Straight-line velocity; VAP, Average path velocity; ALH, Amplitude of lateral head displacement; LIN, Linearity; STR, Straightness; BCF, Beat cross frequency.