Invasion

Invasion Description

1st Record: CA/Coyote Creek (1941, Leidy 2007); 1st Watershed Record: CA/Sacramento-San Joaquin watershed (1922, Cohen and Carlton 1995; Dill and Cordone 1997)

Geographic Extent

CA/Sacramento-San Joaquin Delta (1922, Cohen and Carlton 1995; Dill and Cordone 1997) ; CA/Suisun Marsh (Matern and Moyle 2002); Oakland/Lake Merrit (1965, Cohen and Carlton 1995; Dill and Cordone 1997); 'Collection records during the 1940s for Estuary streams include Green Valley Creek (1940), Coyote Creek (1941), Walnut Creek (1942), Marsh Creek (1945), and Novato Creek (1945) (Leidy, 1984)' (Leidy 2007)