Table 2 Sexual dimorphism in the stickleback brain

Bulbus olfactorius (mm³)

0.105 ± 0.025; 0.054–0.168

0.101

0.107 ± 0.025; 0.039–0.195

0.105

3.4 %^b

Telencephalon (mm³)

1.062 ± 0.184; 0.554–1.579

1.025

0.940 ± 0.167; 0.549–1.573

0.942

8.9 %^a

Tectum opticum (mm³)

3.712 ± 0.486; 2.381–5.007

3.619

3.604 ± 0.469; 2.643–5.025

3.616

<0.1 %

Cerebellum (mm³)

1.017 ± 0.174; 0.626–1.590

0.986

0.944 ± 0.148; 0.654–1.370

0.948

4 %^a

Hypothalamus (mm³)

1.287 ± 0.187; 0.806–1.776

1.251

1.207 ± 0.161; 0.825–1.637

1.215

3 %^a

Total brain (mm³)

4.542 ± 0.195; 4.006–4.929

4.588

4.492 ± 0.190; 4.108–4.968

4.441

3.3 %^{a, b}

Standard length (mm)

40.70 ± 2.66; 35.11–46.72

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42.95 ± 3.07; 36.62–51.82

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