Table 1. Summary of survival and fitness-related traits from two populations of Atlantic salmon (Salmo salar).
|
Trait
|
n |
LaHave
|
n |
Sebago
|
| Egg traits | ||||
| Diameter (mm) | 35 | 5.72±0.34 | 28 | 5.33±0.40 |
| Mass (g) | 35 | 0.1051±0.0133 | 28 | 0.0864±0.0168 |
| Relative fat (g g−1 of egg) | 35 | 0.0031±0.0077 | 28 | 0.0089±0.0141 |
| Relative protein (g g−1 of egg) | 35 | 0.3702±0.0321 | 28 | 0.3780±0.0387 |
| Relative energy (kJ g−1 of egg) | 35 | 9.00±0.76 | 28 | 9.42±0.88 |
| Egg survival (%) | ||||
| Over time | 75 | −3.29 × 10−3±2 × 10−5 | 40 | −4.14 × 10−3±3 × 10−5 |
| Days 0–83 | 75 | 69.1±19.0 | 40 | 53.8±19.9 |
| Alevin survival (%) | ||||
| Over time | 75 | −3.30 × 10−2±6 × 10−3 | 40 | -2.30 × 10−2±5 × 10−3 |
| Days 84–138 | 75 | 84.0±8.2 | 40 | 79.9±8.8 |
| Fry survival (%) | ||||
| Days 139–192 | 75 | 61.3±19.5 | 40 | 58.0±19.0 |
| Overall survival (%) | 25 | 35.7±10.2 | 20 | 23.6±14.1 |
| Development time | ||||
| Over time | 75 | 2.42 × 10−1±2 × 10−3 | 40 | 1.11 × 10−1±1 × 10−3 |
| To hatch (degree-days) | 75 | 479.8±6.4 | 40 | 472.3±12.1 |
| Size traits | ||||
| Body length at hatch (mm) | 750 | 16.3±0.8 | 400 | 15.6±0.8 |
| Yolk sac volume (mm3) | 750 | 72±17 | 400 | 64±15 |
| Body length at yolk sac absorption (mm) | 750 | 25.8±1.0 | 400 | 25.7±1.2 |
| Energy conversion | ||||
| Specific growth rate (100 × ln(mm)/degree-days) | 75 | 0.146±0.007 | 40 | 0.146±0.009 |
| Yolk sac conversion efficiency (mm mm−3) | 75 | 0.136±0.016 | 40 | 0.158±0.018 |
Presented are means±1 s.d., except for over time traits that are logit estimate±1 s.e. There were 25 LaHave families (5 females × 5 males) and 20 Sebago families (4 females × 5 males). Egg traits were based on seven eggs per female. Survival, development time to hatch and energy conversion numbers (n) represent the total number of replicates: three per LaHave family and two per Sebago family. Size traits were represented by 10 individuals per replicate. For example, n of 35 for LaHave egg traits is based on seven eggs from each of the five females and n of 750 for LaHave size traits is based on 10 individuals from each of the three replicates from each of the 25 families.