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It is not common but early run female Sauger/Walleye will reabsorb their eggs when the temps stay too cold for a long period such as we are going through…42-43 degrees is a general minimum spawn temp. P-4 is just gotten there.
Its too early for re-absortion to have taken place already. That process is slow. I think is more likely that the fish spawned elsewhere along the river where water temps got warm enough to promote spawning and had moved upstream to feed. Not all of the walleye/sauger from Lake Pepin make that annual trek to spawn….probably not near as many as thought….its just that their numbers get concentrated in the river setting.
Spawned out walleyes and sauger have been taken for two weeks in the Lake City area and Pepin has offered water at or above the preferred spawning temps for some time. The lake flows slower than the river after it widens allowing the water to warm quickly.
Darned nice sauger though in anyones’ book. Congrats!