Table 2 Total length and egg characteristics of ruffe collected from one brackish water (Pärnu) and two freshwater (Saadjärv and Peipsi) sites
Site | TL (mm) | Fish condition | Egg diameter (mm) | Egg wet weight (mg) | Egg dry weight (mg) | Egg dry matter (%) | Egg mass energy (kJ/g) | Egg energy (J) |
|---|---|---|---|---|---|---|---|---|
Pärnu Bay | 189 ± 21 124–233 N = 42 | 0.90 ± 0.08 0.72–1.11 N = 42 | 1.125 ± 0.055 1.016–1.233 N = 42 | 0.676 ± 0.095 0.508–0.923 N = 42 | 0.226 ± 0.035 0.171–0.321 N = 42 | 34.4 ± 1.3 31.7–36.5 N = 42 | 26.34 ± 0.63 25.51–28.10 N = 16 | 6.15 ± 1.02 4.47–8.52 N = 16 |
Lake Saadjärv I | 97 ± 10 80–115 N = 21 | 0.98 ± 0.05 0.89–1.08 N = 21 | 0.913 ± 0.036 0.842–0.990 N = 21 | 0.357 ± 0.051 0.284–0.446 N = 21 | 0.118 ± 0.015 0.094–0.146 N = 21 | 33.2 ± 1.6 30.1–36.2 N = 21 | 25.94 ± 0.36 25.25–26.34 N = 8 | 3.29 ± 0.41 2.53–3.77 N = 8 |
Lake Saadjärv II | 110 ± 9 92–125 N = 22 | 1.01 ± 0.07 0.90–1.35 N = 22 | 0.831 ± 0.024 0.779–0.876 N = 22 | 0.286 ± 0.040 0.225–0.390 N = 22 | 0.083 ± 0.012 0.059–0.113 N = 22 | 29.0 ± 2.6 21.7–32.5 N = 22 | 24.99 ± 0.67 23.96–26.00 N = 7 | 2.17 ± 0.28 1.87–2.74 N = 7 |
Lake Peipsi | 150 ± 16 109–168 N = 31 | 0.79 ± 0.07 0.67–0.97 N = 31 | 0.804 ± 0.038 0.736–0.888 N = 31 | 0.284 ± 0.049 0.157–0.414 N = 31 | 0.074 ± 0.011 0.042–0.100 N = 31 | 26.2 ± 2.2 21.5–29.9 N = 31 | 25.24 ± 0.84 23.93–26.45 N = 8 | 1.91 ± 0.36 1.54–2.57 N = 8 |