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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.
The lake sturgeon (Acipenser fulvescens), also known as the rock sturgeon, [7] is a North American temperate freshwater fish, one of about 25 species of sturgeon.Like other sturgeons, this species is a bottom feeder and has a partly cartilaginous skeleton, an overall streamlined shape, and skin bearing rows of bony plates on the sides and back.
The shovelnose sturgeon (Scaphirhynchus platorynchus) [5] is the smallest species of freshwater sturgeon native to North America. It is often called hackleback , sand sturgeon , or switchtail . Switchtail refers to the long filament found on the upper lobe of the caudal fin (often broken off as adults).
Jul. 17—A milestone in the restoration of the Genesee River has been reached following the collection of a spawning female lake sturgeon in the lower Genesee River for the first time in more ...
Fishing for lake sturgeon in Minnesota, Wisconsin and Michigan is not a threat to the ancient species, the U.S. Fish and Wildlife Service (FWS) concluded in its decision not to list the giant fish ...
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The population of Atlantic sturgeons has decreased dramatically due to overharvesting. The late 19th century saw a surge in demand for caviar, which led to overfishing of the Atlantic sturgeon. Today, only 22 out of its 38 original spawning rivers still have viable populations of the species. [15]
Pallid sturgeon were found to prefer wider river channels, midchannel sandbars, and numerous islands, and were most commonly recorded in water depths between 2 and 47 feet (0.61 and 14.33 m). The study also showed that the pallid sturgeon moved as much as 13 miles (21 km) per day and up to 5.7 miles per hour (9.2 km/h). [32]