Pick Our Brain - June 2010

What is the percentage of native fish in the Delta?

About half of all fish species in the upper estuary (Suisun Bay/Marsh and the Delta) are non-native species, according to sampling and calculations by Dr. Peter Moyle, Professor of Biology at the University of California, Davis. Moyle has more than four decades of experience working on fish in Suisun Marsh and the Delta.

According to Moyle, non-native fish species make up about 60 percent of the species in the Delta, 45 percent in Suisun Marsh and 20 percent in San Francisco Bay.

Native and Non-native Fish Species
Native and Non-native Fish Species