Invasion

Invasion Description

1st Record: CA/Sacramento-San Joaquin Delta (1956, Cohen and Carlton 1995; Dill and Cordone 1997; Moyle and Randall 1999)

Geographic Extent

CA/Sacramento-San Joaquin Delta (1956, Cohen and Carlton 1995; Dill and Cordone 1997; Moyle and Randall 1999; Brown and Michniuk 2007, increasing); CA/Suisun Marsh (1999, Matern et al. 2002); San Pablo Bay (Dill and Cordone 1997); Walnut Grove/CA/North Fork Mokelumne River (Cavallo et al. 2012)