I have to believe they spawned when the temperature was right. The spawn may not have survived the water rise. I don't know if the fish lose their eggs or if the eggs just dry up when the water rises so fast over the male nest that the females won't lay. I know that with all that new water you will need a good spawn to keep the lbs per acre the same. 2 lb. average, boy I am in the wrong section of the country.