AN ANNUAL TRADITION
STURGEON SPAWN
The sturgeon spawn is Princeton’s most ancient tradition. Lake Sturgeon have been coming to the banks of the Fox River for thousands of years. In spring, when water temperatures begin to climb, these giant “dinosaur fish” follow an ancient and mysterious impulse to travel upstream from Lake Winnebago and Green Bay. They seem to remember their favorite places, and only spawn in a few select locations along the Fox River.
Upon reaching these rocky, shallow spots, the gentle monsters come to the surface to lay and fertilize eggs. They are easily seen up close behind businesses on the south side of West Water Street in Princeton.
Incredibly, the four-to-six-foot-long sturgeon sometimes rear or jump out of the water, creating quite a show. Even when they are just cruising the riverbanks, their unique shark-like fins and armored bodies are amazing to watch. Lake Sturgeon are a protected species, so watching is all we can do—for the public, catching or even touching sturgeon while they spawn is illegal.
On certain days, representatives from the WI DNR and scientists from around the country do catch, measure, tag, and release lake sturgeon here in Princeton. The wrestling match between these 100-250 pound fish and their human protectors is incredible to watch.
When to See the Sturgeon
Lake Sturgeon are evasive. They spawn when they feel the water is just right. Some springs, when water flow is high and water temperatures rise slowly, spawning begins when the water temperature reaches 53°F. In other years, when water levels are low and water temperature rise quickly, spawning does not begin until water temperatures reach 58-59°F. Spawning usually lasts for about a week. Sometimes, spawning may start, but stop for a time if the weather turns cold, then start again. We can only say that the sturgeon will likely spawn sometime between mid-April and late May. We hope that the sturgeon will spawn during our Sturgeon Celebration, but there’s no guarantee. We will post on the Chamber’s Facebook page when the spawning starts, so make sure to “like” our page!
Where to See the Sturgeon
Public viewing locations include Megow Park on West Water Street and the ends of Washington Street and Pearl Street, off of West Water Street. Businesses on the south side of West Water Street own the property along the river, but often allow people to walk in their “back yards” to see the sturgeon. Please be respectful of private property!
Riverside businesses with backyard spawning locations include:
Horseradish Kitchen + Market
Pasttimes Books & Antiques
Daiseye (fair trade clothing & gifts)
Molly’s Buckhorn Bar & Grill
Botanica Spa
Renard’s European Bakery
Knickerbocker Landing Saloon & Eatery
Wisconsin Special Properties
National Exchange Bank
You may also see sturgeon near:
The Ice Bowl (ice cream, food, tiki bar, tubing)
Megow Park
Heistand Park (on Jefferson St, off of Mechanic St)
More About Lake Sturgeon
These amazing “dinosaur fish” start as eggs about 3mm wide, and grow to be up to 6 feet long, and weighing up to 250 pounds. They are called dinosaur fish because they haven’t changed since the time of the dinosaurs. Lake Sturgeon have thick skin and bony plates called “scutes” instead of scales. They live very long lives- up to 150 years! They cruise the bottoms of lakes and rivers, feeling their way through the mud with tentacles around their mouths called “barbels.” Sturgeon eat by extending their tube-like mouths and sucking up insects, small fish, fish eggs, mussels, snails, crayfish, and tasty treats. When they reach maturity (15-20 years old for males, 24-26 years old for females) they begin to lay and fertilize eggs. Each female will only lay eggs every 4-6 years. A female can lay 700,000 eggs in her life, but only about 1 in 50,000 survive. Sturgeon eggs stick to rocks until they hatch, in about 5-8 days. Baby sturgeon, called “fry,” grow quickly. In two weeks they can grow to be an inch long.
