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Table 4
Biogeographic comparison of population parameters for pike. For this study fork length was converted to total length. ⁎ The length-at-age data are based on observed values except for the Pactola Reservoir (age-length key) and the Lake Trasimeno (back-calculation method).
| Parameters | Study area | |||||
|---|---|---|---|---|---|---|
| Lake Rubikiai (Lithuania) | Northern Ontario river (Canada) | Pactola Reservoir (USA) | Lake Trasimeno (Italy) | Lake Karamık (Turkey) | Anzali Wetland (Iran) | |
| Latitude (°N) | 55 | 49 | 44 | 43 | 38 | 37 |
| Avg. Ann. T. (°C) | 5.8 | 1.2 | 8.7 | 13.1 | 14 | 17.4 |
| Mean depth (m) | 5.7 | – | 19 | 4.7 | 2 − 3 | 1–3 |
| n (samples) | 1586 | 152 | 465 | 166 | 1067 | 872 |
| Age range (yrs) | 1–12 | 1–10 | 1–11 | 1–9 | 1–7 | 0–8 |
| Total mortality (Z) | 0.45 | 0.49 | 0.56 | – | 1.28 | 0.96 |
| VBGF parameters | ||||||
| L∞ | 131.7 | 98.4 | 152 | 162.7 | 127.2 | 94.9 |
| k | 0.15 | 0.13 | 0.08 | 0.09 | 0.09 | 0.12 |
| t0 | −0.40 | −0.16 | −0.25 | −0.29 | −0.37 | −1.39 |
| Aging material | Scale | Pectoral fin ray | Cleithral | Scale | Scale | Scale |
| Length-at-age⁎ (yrs) | ||||||
| 2 | 33.6 | 36.7 | 45.8 | 29.7 | 28.8 | 35.9 |
| 3 | 40.5 | 45.4 | 53.7 | 38.7 | 37.4 | 43.3 |
| 4 | 46.9 | 51.9 | 61.3 | 49.8 | 45.4 | 49.8 |
| Reference | Žiliukienė and Žiliukas (2012) | Griffiths et al. (2004) | Scheibel et al. (2016) | Lorenzoni et al. (2002) | Çubuk et al. (2005) | Present study |
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