Open Access
Table 3
A comparison of growth parameters in different M. margaritifera populations (results on populations from the Syskyanjoki River, the Nemina River and the Varzuga River presented in Zotin and Ieshko (2018)).
| River (latitude) |
a | k (per year) | P1 (years) | P2 (years) |
|---|---|---|---|---|
| Syskyanjoki (61.7° N) |
0.114 ± 0.003 (n = 88) |
0.121 | – | 3.9 ± 0.1 (n = 87) |
| Nemina (62.8° N) |
0.064 ± 0.005 (n = 23) |
0.066 | 5.1 ± 0.1 (n = 13) |
3.9 ± 0.1 (n = 20) |
| Livojoki (64.8° N) |
0.060 ± 0.006 (n = 32) |
0.062 | 7.2 ± 0.3 (n = 26) |
4.1 ± 0.1 (n = 26) |
| Varzuga (66.7° N) |
0.048 ± 0.001 (n = 90) |
0.049 | 6.5 ± 0.1 (n = 68) |
4.1 ± 0.1 (n = 68) |
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