Invasion

Invasion Description

1st Records: Hammond/OR/Trestle Bay (Jetty Lagoon) Columbia River Estuary (10/31/09, Nishizawa et al. 2014, 46°13 30.03 N, 123°59 29.70 W); Hammond/OR/Trestle Bay (Jetty Lagoon) Columbia River Estuary (10/31/09, Nishizawa et al. 2014, 46°13 30.03 N, 123°59 29.70 W

Geographic Extent

Hammond/OR/Trestle Bay (Jetty Lagoon) Columbia River Estuary (10/31/09, Nishizawa et al. 2014, 46°13 30.03 N, 123°59 29.70 W; Tosuji and Furota 2016); Tongue Point, Astoria/OR/Columbia River Estuary (10/31/09, Nishizawa et al. 2014, 46°11?46.54?N, 123°46 44.00 W); WA/Baker Bay, Columbia River (7/5/2012, Tosuji and Furota 2016, 46°18?N, 124°03?W, 36 H. diadroma, vs. 115 native H. limnicola); OR/Youngs Bay, Columbia River (7/5/2012, Tosuji and Furota 2016, 46°10?N, 123°50?W, 21 H. diadroma, 24 H. limnicola)