by Dan Bacher
The abundance of Delta fish species documented in the California Department of Fish and Wildlife’s fall midwater trawl survey plummeted again in 2012, after a temporary increase among Delta smelt and other species in 2011.
This record low abundance was predicted by Thomas Cannon, a well-respected fishery biologist who testified on behalf of the California Sportfishing Protection Alliance at State Water Resources Control Board meetings in October and November, 2012.
The most alarming of all of the declines was for threadfin shad, a once abundant forage fish used for striped bass bait on the Sacramento-San Joaquin River Delta.
The threadfin shad reached a record low abundance level, an index of 41. The index is a relative measure of abundance by the California Department of Wildlife (CDFW), formerly the California Department of Fish and Game (CDFG)... Read More