Invasion

Invasion Description

1st Record: north of Pittsburg/CA/Sacramento River (1945, Counts 1986; Counts 1991), CA/Santa Barbara Harbor (1986, Counts 1986, Counts 1991, shells or clams washed out of streams by floods?)

Geographic Extent

north of Pittsburg/CA/Sacramento River (1945, Counts 1986; Counts 1991; Peterson and Vayssieres 2010); CA/Delta-Mendota Canal (Counts 1986); Antioch/CA/Sacramento River (1951, Counts 1991; USGS Nonindigenous Aquatic Species Program 2007); CA/Old River (Peterson and Vayssieres 2010, abundant); near Port Chicago/CA/Suisun Bay (1960, Counts 1991; USGS Nonindigenous Aquatic Species Program 2007); CA/Grrizzly Bay (Peterson and Vayssieres 2010, abundant 1983-1984, wet years before Corbula invasion);  Mokelumne Aqueduct, Shad Landing/CA/San Joaquin River (1945, Counts 1986, Counts 1991; USGS Nonindigenous Aquatic Species Program 2007); Benicia/CA/Carquinez Straits (1978, USGS Nonindigenous Aquatic Species Program 2007), CA/Santa Barbara Harbor (1986, Counts 1986, Counts 19991, shells or clams washed out of streams by floods?)