Table 2 General linear models of mean pore area measurements for four cranial canals, testing for differences between fish from different capture depths

Mean mandibular pore area (log₁₀)

Capture depth

0.805

53.63

2

194

 < 0.001^***

S-D

0.085

Standard length (log₁₀)

1.733

231.03

1

194

 < 0.001^***

M-D

 < 0.004^**

Sex

0.007

0.89

1

194

0.341

M-S

0.442

Gross lateral head morphology (PC1)

0.001

0.001

1

194

0.993

Gross ventral head morphology (PC1)

0.002

0.29

1

194

0.588

Mean preopercular pore area (log₁₀)

Capture depth

1.357

105.75

2

194

 < 0.001^***

S-D

 < 0.001^***

Standard length (log₁₀)

1.644

256.10

1

194

 < 0.001^***

M-D

 < 0.001^***

Sex

0.001

0.156

1

194

0.694

M-S

1.000

Gross lateral head morphology (PC1)

0.023

3.683

1

194

0.056

Gross ventral head morphology (PC1)

0.007

1.030

1

194

0.312

Mean infraorbital pore area (log₁₀)

Capture depth

3.934

176.35

2

194

 < 0.001^***

S-D

 < 0.001^***

Standard length (log₁₀)

1.812

162.46

1

194

 < 0.001^***

M-D

 < 0.001^***

Sex

0.063

5.63

1

194

0.0186^*

M-S

 < 0.001^***

Gross lateral head morphology (PC1)

0.023

3.68

1

194

0.056

Gross ventral head morphology (PC1)

0.007

1.03

1

194

0.312

Mean otic pore area (log₁₀)

Capture depth

1.289

76.25

2

194

 < 0.001^***

S-D

 < 0.001^***

Standard length (log₁₀)

1.740

205.86

1

194

 < 0.001^***

M-D

 < 0.001^***

Sex

0.028

3.25

1

194

0.073

M-S

0.149

Gross lateral head morphology (PC1)

0.207

20.61

1

194

 < 0.001^***

Gross ventral head morphology (PC1)

0.300

2.98

1

194

0.086