There’s a whole bunch of juvenile striped bass roaming Lake Del Valle and that further brightens the future for the east bay’s richest and most diverse lake.
Whether the bass were born via spawning in the lake or came in from pumps is unknown, but there are a lot of year-old stripers in the eight to 10 inch class.
East Bay Regional Park District Fisheries Program Manager Pete Alexander said spawning was documented in the lake between 2000 and 2010 because juvenile fish were present and water from the Delta wasn’t pumped into the lake. There was water brought in from the Delta this year.
“We don’t know for sure if there was spawning or not but either way there are young stripers in the lake and there are a number of year classes swimming around Del Valle,” Alexander said.
Stripers generally are slow growing but there is plenty of forage for the bass in Del Valle.
Two-year old striped bass are in the 12 to 15 inch range. Alexander said there isn’t any data about how quickly bass grow in Del Valle in later years.
Threadfin shad and inland silversides make up most of the diet but the bass may feed on planted rainbows, but there haven’t been any documented cases of bass with trout in their stomach, Alexander said.
“We did a study four years ago with striped bass and didn’t find anything but threadfin shad,” Alexander said.
Anglers will find the larger striped bass in deep water, but once the rains begin and incoming creeks start flowing, stripers will move closer to the inlets.
Most anglers utilize Del Valle for its planted trout, but there are abundant largemouth and smallmouth bass as well as king salmon and kokanee salmon. It is easily the most diverse lake in the East Bay and also boasts of a high catch rate.
Keywords: Lake Del Valle, Striped bass, East Bay Regional Park District