Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Frequency analysis for presence/absence of shell scars. Scars indicate specimens that survived a crab attack
| Number | Number | |||
|---|---|---|---|---|
| with | without | |||
| Region | Locality | Morph | scars | scars |
| Sweden | North (Tjärnö) | Crab | 15 | 11 |
| Wave | 6 | 23 | ||
| South (Lysekil) | Crab | 18 | 11 | |
| Wave | 7 | 23 | ||
| Britain | North (Dunbar) | Crab | 13 | 14 |
| Wave | 9 | 19 | ||
| South (Thornwick) | Crab | 11 | 18 | |
| Wave | 1 | 29 | ||
| Spain | North (Burela) | Crab | 10 | 20 |
| Wave | 11 | 17 | ||
| South (Silleiro) | Crab | 7 | 23 | |
| Wave | 1 | 28 | ||
| All regions | Crab | 74 | 97 | |
| Wave | 35 | 139 |
