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Sturgeon Spawning Update from Ron Bruch on April 25, 2011

April 25, 2011

The following update has been posted with permission from Ron Bruch and the WDNR:

The clear skies, sun, and relatively warm weather today brought water temperatures in the Wolf River almost to the point we would expect to see widespread sturgeon spawning soon. Significant numbers of fish were moving in and exhibiting serious pre-spawn behaviors at the Sturgeon Trail on County Highway X west of New London, Shawano Dam, and a couple of sites on private property. Early this afternoon we saw several females in the 175-190 lb class move in with flotillas of males into these sites, but as of 4 PM active spawning had not yet commenced, although if water temps continue to rise through the night as we expect, these fish could possibly begin spawning by morning. We’ll find out tomorrow (Tuesday) morning when we make our rounds. Today we were able to tag some spawning fish on the Embarrass River in New London at Pfeiffer Park. There are quite a few fish in the river at this site, and it is possible that more females may begin ovulating and move into this site by tomorrow as well.

Unfortunately the weather forecast does not look too conducive to bringing on a lot of sturgeon spawning, as we are supposed to see rain and high air temperatures only near 50 for the next three days. If enough females were brought into ovulation by today’s significant increase in water temperature though, the show may still go on over the next 3-4 days despite the coming cool and rainy weather.

Carl Mesman, our LE Sturgeon General, will be opening Sturgeon Camp tomorrow (Tuesday) with the first shifts of volunteer guards deployed for tomorrow’s night shift.

Till tomorrow….

Ronald M. Bruch, PhD
Upper Fox-Wolf Fisheries Work Unit Supervisor, Wisconsin Department of Natural Resources”

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