Table 1.
Sampling information
| Sea | Population | Code | Years sampled (number of genotyped individuals) | Salinity (psu) | Worm density | Observed developmental modes* |
|---|---|---|---|---|---|---|
| Baltic Sea (st) |
Ängsö |
FIA |
2008(53); 2009(52); 2010(42) |
6-8 |
Low |
B |
| Fårö |
FIF |
2008(45); 2009(40); 2010(39) |
6-8 |
Low |
- |
|
| |
Vellerup |
DKV |
2008(43); 2009(47); 2010(43) |
20-21 |
Low to medium |
I, P, B |
| Rörvig |
DKR |
2009(42); 2010(40) |
20-22 |
Medium |
I, B, P |
|
| |
Herslev |
DKH |
2008(24); 2010(42) |
14 |
Low |
I, B |
| Wadden Sea (it) |
Netherlands |
NET |
2009(48); 2010(46); 2011(42) |
28 |
High to very high |
P, I, B |
| North Sea (it) | Drum sands | UK | 2009(28); 2010(49) | 28 | High | P |
Pygospio elegans sampling locations (st = sub-tidal, it = intertidal), population codes, and years sampled, with number of individuals genotyped per sample in parentheses. Salinity measured at each location, qualitative estimates of worm density and observed larval developmental modes are noted, with the most common developmental mode listed first.
*Observed larval developmental modes: B = benthic, I = intermediate, P = planktonic.