I agree with Sunil.
There have been a few threads on Pond Boss about fish escaping, and I vaguely recall that a few species seemed more likely to travel than others.
Since stripers and white bass are both generally "open water" species, then I hope your HSB have the same tendencies. I suspect they would tend to avoid moving water. Further, since your rains were NOT during the spring spawning season, perhaps they just stayed in a school in the middle of your pond?
Fingers crossed that you give us a follow-up report in the spring saying that you still observe both of your year classes of HSB!
