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Table 1
Influence of specimen size (hard clam shell length subdivided into four size classes) on the damage frequency and degree inflicted by hand collecting and hand dredging.
| Hand collecting | Hand dredging | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Shell length | 0 | 1 | 2 | 3 | 4 | 0 | 1 | 2 | 3 | 4 | |
| Dorsal | <3cm | – | – | – | – | – | – | – | – | – | – |
| 3–5cm | – | – | 4.3 | – | – | – | 5.7 | 5.4 | – | – | |
| 5–7cm | – | 3.2 | 0.1 | – | – | – | 6.8 | 4.1 | – | – | |
| >7 | – | 7.2 | – | – | – | – | 17.8 | – | – | – | |
| Ventral | <3cm | – | – | – | – | – | – | – | 3.5 | – | – |
| 3–5cm | – | 3.2 | – | – | – | – | 10.5 | 1.6 | – | – | |
| 5–7cm | – | 2.8 | – | – | – | – | 5.6 | 0.3 | – | – | |
| >7 | – | – | – | – | – | – | 1.6 | – | – | – | |
| Both dorsa | <3cm | 5.1 | – | – | – | – | 1.1 | – | 0.7 | 3.4 | 1.1 |
| 3–5cm | 15.4 | – | – | – | – | 7.3 | 2.5 | 0.3 | 0.7 | 0.4 | |
| 5–7cm | 38.7 | – | – | – | – | 7.0 | 1.4 | – | 0.4 | – | |
| >7 | 19.9 | – | – | – | – | 10.2 | – | – | – | – | |
| 79.1 | 16.4 | 4.4 | – | – | 25.6 | 51.9 | 15.9 | 4.5 | 1.5 |
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