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The largest sturgeon on record was a beluga female captured in the Volga Delta in 1827, measuring 7.2 m (23 ft 7 in) long and weighing 1,571 kg (3,463 lb). Most sturgeons are anadromous bottom-feeders, migrating upstream to spawn but spending most of their lives feeding in river deltas and estuaries.
When ready to spawn, white sturgeon choose a variety of substrates dependent on the river system, spawning on gravel or rocky substrate in moderate to fast currents, with observed depths of 3–23 m (9.8–75.5 ft), and water velocities at the bottom on a range of 0.6-2.4 m/sec. [21] When eggs are released by the female, they are negatively ...
A donation of $15 for each sturgeon released helps support the Riveredge sturgeon-rearing program. Since 2006 about 22,000 young sturgeon have been stocked in the Milwaukee harbor or river ...
Scott and Crossman 1973 reported potential spawning in the Fraser River in Canada, but Moyle 2002 reported that there was no evidence of green sturgeon spawning in Canada or Alaska. Green and white sturgeon enter the Feather River system annually and spawning of green sturgeon was documented for the first time in 2011. [43]
An Atlantic sturgeon at the Aquarium du Québec. Rather than having true scales, the Atlantic sturgeon has five rows of bony plates known as scutes.Specimens weighing over 800 lb and nearly 15 ft in length have been recorded, but they typically grow to be 6–8 ft (1.8–2.4 m) and no more than 300 lb (140 kg).
Warm February weather contributed to poor ice and a low sturgeon harvest for 2024, but the DNR says warm winters have more effect on spring spawning.
Males attain sexual maturity at 12–16 years of age, whereas females do so at 16–22 years. They will spawn every four to seven years. At one time, beluga sturgeons could migrate up to 1,000 km (620 mi) upriver to spawn, but dams in almost every major tributary that they utilize have impeded historic spawning routes.
Lake sturgeon congregate in the shallows of the Wolf River on April 14 near Shiocton. The fish are gathering in the area to spawn.