The cut-points are estimated for the following combinations of species and area. To make the estimation problem more tractable, the data are further split by contracting party. The value of \(K\) is the highest VDS class considered having combined the upper classes that have few observations.
| species | region | country | K |
|---|---|---|---|
| Buccinum undatum | Skagerrak and Kattegat | Denmark | 1 |
| Buccinum undatum | Southern North Sea | Denmark | 1 |
| Littorina littorea | Southern North Sea | Denmark | 3 |
| Nucella lapillus | Barents Sea | Norway | 4 |
| Nucella lapillus | Celtic Sea | France | 4 |
| Nucella lapillus | Celtic Sea | Ireland | 5 |
| Nucella lapillus | Channel | France | 3 |
| Nucella lapillus | Iberian Sea | Portugal | 5 |
| Nucella lapillus | Iberian Sea | Spain | 3 |
| Nucella lapillus | Irish and Scottish West Coast | Ireland | 6 |
| Nucella lapillus | Irish and Scottish West Coast | United Kingdom | 4 |
| Nucella lapillus | Irish Sea | Ireland | 5 |
| Nucella lapillus | Irish Sea | United Kingdom | 4 |
| Nucella lapillus | Northern Bay of Biscay | France | 4 |
| Nucella lapillus | Northern North Sea | United Kingdom | 5 |
| Nucella lapillus | Norwegian Trench | Norway | 4 |
| Nucella lapillus | Skagerrak and Kattegat | Norway | 4 |
| Nucella lapillus | Southern North Sea | The Netherlands | 2 |
| Ocenebra erinaceus | Northern Bay of Biscay | France | 2 |
| Tritia nitida / reticulata | Iberian Sea | Portugal | 4 |
| Tritia nitida / reticulata | Iberian Sea | Spain | 4 |
| Tritia nitida / reticulata | Skagerrak and Kattegat | Sweden | 4 |
| Tritia nitida / reticulata | Southern North Sea | Denmark | 4 |
| Tritia nitida / reticulata | Southern North Sea | The Netherlands | 1 |