|  | Directional selection | Quadratic selection |
---|---|---|---|
Data set | Trait | β ± SE | γ ± SE |
Full | Head Length | 0.08 ± 0.16 | - 0.06 ± 0.16 |
 | Head Height | 0.10 ± 0.12 | 0.14 ± 0.14 |
 | Tail Length | - 0.16 ± 0.13 | 0.004 ± 0.16 |
 | Tail muscle Height | - 0.14 ± 0.15 | - 0.10 ± 0.14 |
 | Tail Fin Height | 0.22 ± 0.09* | - 0.06 ± 0.11 |
 | Swimming speed | - 0.01 ± 0.07 | - 0.06 ± 0.10 |
Reduced | Head Length | 0.05 ± 0.19 | - 0.10 ± 0.17 |
 | Head Height | 0.09 ± 0.13 | 0.14 ± 0.15 |
 | Tail Length | - 0.17 ± 0.14 | 0.04 ± 0.19 |
 | Tail muscle Height | - 0.08 ± 0.16 | - 0.03 ± 0.17 |
 | Tail Fin Height | 0.21 ± 0.10* | - 0.05 ± 0.12 |
 | Swimming speed | - 0.05 ± 0.08 | - 0.10 ± 0.11 |