Table 2 Dynamics of average shell length (L ± SE, mm) of the 1988 (sites 1, 2) and 1999 (sites 3, 4) generations of Mya arenaria
Age (years) | L ± SE | |||||
|---|---|---|---|---|---|---|
Location namea | ||||||
MT_1 | LT_1 | MT_2 | LT_2 | MT_3 | MT_4 | |
1 | 8.2 ± 0.1 | 9.2 ± 0.1 | 5.4 ± 0.1 | 7.1 ± 0.1 | 4.2 ± 0.1 | 7.4 ± 0.3 |
2 | 12.0 ± 0.1 | 13.9 ± 0.2 | 9.1 ± 0.2 | 9.9 ± 0.2 | 8.1 ± 0.2 | 11.1 ± 0.3 |
3 | 15.8 ± 0.3 | 17.0 ± 0.1 | 14.1 ± 0.2 | 14.4 ± 0.2 | 12.2 ± 0.2 | 14.3 ± 0.3 |
4 | – | 22.1 ± 0.2 | 19.4 ± 0.3 | 19.1 ± 0.2 | 15.9 ± 0.3 | 25.7 ± 0.5 |
5 | 24.3 ± 0.4 | 25.0 ± 0.2 | 20.3 ± 0.4 | 19.5 ± 0.3 | 17.5 ± 0.2 | 35.7 ± 0.5 |
6 | – | 29.4 ± 0.3 | – | – | – | – |
7 | 30.1 ± 0.7 | 31.9 ± 0.4 | 24.0 ± 0.5 | 30.0 ± 0.5 | 25.5 ± 1.4 | 35.8 ± 0.9 |
8 | 34.1 ± 0.6 | 36.9 ± 0.8 | 25.9 ± 0.4 | 28.7 ± 0.7 | – | – |
9 | 34.5 ± 0.5 | 38.1 ± 0.3 | 30.1 ± 2.1 | 31.7 ± 1.6 | – | – |
10 | 39.5 ± 1.0 | 41.7 ± 0.4 | – | – | – | – |
11 | 43.0 ± 0.4 | 43.0 ± 0.4 | – | – | – | – |
12 | 47.1 ± 1.2 | 45.1 ± 0.4 | – | – | – | – |
13 | 46.2 ± 1.1 | 50.1 ± 0.6 | – | – | – | – |
14 | 48.5 ± 0.8 | 50.3 ± 0.5 | – | – | – | – |
15 | 52.8 ± 1.3 | 50.9 ± 0.5 | – | – | – | – |
16 | 50.3 ± 1.5 | 50.2 ± 0.8 | – | – | – | – |
17 | – | – | – | – | – | – |
18 | 62.6 ± 1.6 | 56.4 ± 1.0 | – | – | – | – |
19 | 57.6 ± 2.2 | 53.6 ± 1.3 | – | – | – | – |
20 | 57.3 ± 1.8 | 57.4 ± 1.3 | – | – | – | – |
21 | – | – | – | – | – | – |
22 | – | 59.0 ± 1.1 | – | – | – | – |
23 | 62.1 ± 3.2 | 58.6 ± 1.1 | – | – | – | – |
24 | – | 60.6 ± 1.8 | – | – | – | – |
25 | – | 59.2 ± 1.3 | – | – | – | – |
L ∞ | 82.02 | 67.16 | 37.50 | 59.80 | 128.10 | 68.17 |
k | 0.06 | 0.09 | 0.16 | 0.08 | 0.03 | 0.12 |
t 0 | –0.50 | –0.43 | 0.07 | –0.40 | –0.14 | 0.35 |
L max (age, years) | 71 (20) | 70 (20) | 46 (9) | 37 (8) | 38 (7) | 50 (7) |