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Table 3 PGLS of CatSper1 length in relation to sperm velocity parameters

From: Structural evolution of CatSper1 in rodents is influenced by sperm competition, with effects on sperm swimming velocity

Dependent variable

Predictor

n

d.f.

Slope

R2

F

P

λa

P(λ=0)b

P(λ=1)b

ESc

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

  1. P values < 0.05 (*), < 0.01 (**) and < 0.005 (***) indicate statistical significance.
  2. aλ value indicates phylogenetic effect.
  3. bSignificance of log-likelihood ratios for λ against models with λ = 0 and λ = 1 are shown. Statistically significant values are shown in bold.
  4. cEffect size (ES) calculated from the F-values.
  5. dNoncentral 95% confidence limits (CL). Confidence intervals excluding 0 indicate statistically significant relationships and are shown in bold.
  6. 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.