Table 1
Measurements and calculations of O. edulis (N = 100) over all 10 treatments (Control; calcein concentrations: 100 mg l−1, 150 mg l−1, 200 mg l−1, immersion times: 6 h, 12 h, 24 h). Condition index was calculated from the dry weight of bodies and shell according to Davenport and Chen (1987) and Walne and Mann (1975). Shell height (umbo hinge to longest edge) to the closest 0.1 mm, was measured in May 2021 and in November 2021. Both shell heights were used to calculate external growth [mm]. Internal growth was calculated from measurements in valve cross-sections using in situ fluorescent markings.
| Treatment | Shell height [mm] May 2021 |
Shell height [mm] Nov 2021 |
Dry weight body [g] Nov 2021 |
Dry weight shell [g] Nov 2021 |
Wet weight [g] Nov 2021 |
Condition index Nov 2021 |
External growth [mm] |
Internal growth [mm] |
|---|---|---|---|---|---|---|---|---|
| Control | 65.3 ± 7.6 | 76.1 ± 6.0 | 1.0 ± 0.2 | 30.0 ± 8.1 | 48.1 ± 12.6 | 3.5 ± 0.7 | 10.9 ± 9.6 | |
| 100/06 | 58.2 ± 10.3 | 71.4 ± 11.9 | 0.8 ± 0.4 | 26.7 ± 8.7 | 42.2 ± 13.1 | 3.1 ± 0.7 | 13.1 ± 15.7 | 10.8 ± 4.1 |
| 100/12 | 61.6 ± 10.4 | 68.8 ± 9.1 | 0.8 ± 0.3 | 25.6 ± 7.8 | 41.8 ± 12.2 | 3.2 ± 0.7 | 7.2 ± 13.8 | 8.7 ± 2.4 |
| 100/24 | 59.1 ± 12.9 | 64.9 ± 10.1 | 0.7 ± 0.3 | 21.9 ± 9.1 | 33.4 ± 13.0 | 3.0 ± 0.6 | 5.9 ± 16.4 | 6.8 ± 3.3 |
| 150/06 | 61.5 ± 12.7 | 74.4 ± 11.1 | 0.9 ± 0.4 | 32.1 ± 12.0 | 48.8 ± 18.4 | 3.0 ± 0.6 | 12.8 ± 16.9 | 11.0 ± 3.6 |
| 150/12 | 59.9 ± 14.7 | 68.1 ± 12.6 | 0.7 ± 0.4 | 25.3 ± 13.6 | 39.0 ± 21.2 | 3.0 ± 0.8 | 8.2 ± 19.4 | 9.3 ± 3.6 |
| 150/24 | 60.7 ± 15.9 | 72.0 ± 13.6 | 0.8 ± 0.4 | 25.4 ± 10.2 | 40.7 ± 17.2 | 3.0 ± 0.8 | 11.3 ± 20.9 | 9.0 ± 3.0 |
| 200/06 | 62.1 ± 10.5 | 74.6 ± 12.0 | 1.0 ± 0.4 | 31.6 ± 13.3 | 50.6 ± 21.0 | 3.3 ± 0.6 | 12.6 ± 15.9 | 9.4 ± 3.5 |
| 200/12 | 61.4 ± 11.0 | 67.3 ± 11.3 | 0.7 ± 0.4 | 22.7 ± 8.3 | 36.6 ± 15.2 | 3.1 ± 0.7 | 5.9 ± 15.8 | 7.8 ± 3.5 |
| 200/24 | 59.1 ± 17.2 | 68.0 ± 15.6 | 0.8 ± 0.4 | 22.0 ± 11.9 | 351 ± 19.1 | 3.5 ± 0.6 | 8.9 ± 23.2 | 9.0 ± 3.6 |
| Total | 60.9 ± 12.8 | 70.6 ± 12.1 | 0.8 ± 0.4 | 26.3 ± 11.1 | 41.6 ± 17.6 | 3.2 ± 0,7 | 9.7 ± 17.6 | 9.0 ± 3.9 |
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