Table 2 Linear (β) and quadratic (γ) selection on all morphological traits measured in this study in a data set that included all individuals (Full, N = 172), as well as in a second dataset from which we excluded all individuals whose Gosner stage was > 39 at the time of release were excluded (Reduced, N = 151).
| Â | Â | 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 |