Invasion
Invasion Description
None
Geographic Extent
Rugen/Germay/Baltic Sea (This is the normal inner limit of distribution in the Batic, at about 9 PSU, Hoppe 2002), Kiel/Germany/Kiel Bay (Borges 2013; Borges et a;l2014); Klagshamn/Sweden/Baltic Sea (1970s-2006, Appelqvist et al. 2014; Appelqvist et al. 2016)
Vectors
| Level | Vector |
|---|---|
| Probable | Hull Fouling |
Regional Impacts
| Economic Impact | Shipping/Boating | |
| Periodic invasions of T. navalis have occurred in the Baltic Sea, in the 1930s, 1950s, and since 1993, attacking wooden pilings and seawalls as far east as Rostock, Germany (Hoppe 2002). | ||
| Economic Impact | Aesthetic | |
| A major concern in the eastward spread of T. navalis in the Baltic is the threat to many historic shipwrecks, which are important archaeological sites, which up to now have been preserved from borers by the low salinity (Hoppe 2002). | ||