[caption id="attachment_20933" align="alignleft" width="300"] Spectators watch sturgeon at the Shawano Dam, May 1, 2013. (WLUK/Angela Kelly)[/caption]
Because the Wolf River is still frozen, DNR biologist Ryan Koenigs says he expects spawning to begin in three to five weeks.
Typically, spawning takes place in mid-April, mostly in the Wolf River as the fish swim upstream from the Lake Winnebago system. Water temperatures in the 50s trigger the fish to spawn; the activity is popular with spectators as the large fish come very near the shore.
Koenigs says the water still needs to warm up about 20 degrees for spawning to start.