Invasion
Invasion Description
1st records: Mare Island/CA/San Pablo Bay (1913, Barrows 1917; Kofoid 1921; Kofoid and Miller 1927, cited by Carlton 1979); Dumbarton bridge/SA/South San fFancisco Bay (Carlton 1979)
Geographic Extent
Mare Island/CA/San Pablo Bay (1913, Barrows 1917; Kofoid 1921; Kofoid and Miller 1927, cited by Carlton 1979; Wallour 1960); CA/San Pablo Bay (San Francisco Bay) [As T. beachi, Bartsch 1921; Carlton 1979); Benicia/CA/Carquinez Straits (Wallour 1960); Port Chicago/CA/Carquinez Straits (Wallour 1960); San Francisco/CA/San Francisco Bay (Wallour 1960); Brisbane/CA/Brisbane Lagoon, South San Francisco Bay (2004, Cohen et al. 2005)
Vectors
| Level | Vector |
|---|---|
| Alternate | Hull Fouling |
| Alternate | Ballast Water |
Regional Impacts
| Economic Impact | Shipping/Boating | |
| Before the invasion of T. navalis, woodborers were rare in much of San Francisco Bay. The spread of the shipworm may have been aided by a dry period, with high salinities permitting the spread inland past the Mare Island shipyard to Suisun Bay. Boring by Teredo navalis destroyed virtually all the wooden structures in the northern part of the Bay, with damage exceeding half a billion dollars (in 1995 dollars) (Atwood 1922; Carlton 1979; Cohen and Carlton 1995). In recent years, impacts of T. navalis have not been reported (Cohen and Carlton 1995). | ||