Sea Lion predation on sturgeon in the Columbia River at Bonneville Dam rises for sixth year in a row by 2011 with over 3,000 are estimated to have been killed.
Monitors for the US Army Corps of Engineers observed for hours 3,315 winter and this spring and see 1,383 sturgeon was caught by sea lions. When adjusted for the hour is not observed and the predicted factors, predation is 3,003 sturgeon Steller Sea Lion loss and California.
"There has been no increase in annual disappointments, '' said biology Brad James, Washington Department of fish and wildlife.
The Corps took from January to may on weekdays. Monitors also observed for 28 hours in the evening by 2011, determined that only about 1 percent of the predators took place after dark.
The Data also shows all the size of the sturgeon fish which have died, but between 2 feet and 4 feet are affected.
