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Kaluga spends at least part of its life in salt water and returns to rivers to breed. The Kaluga Sturgeon spawns in lower reaches of the Amur River in strong-current habitats in the mainstream of the river on gravel or sandy-gravel bottom at water temperatures of 70 °F (12–20 °C) in depths of 6–10 feet (2–3 m).
Globally, sturgeon fisheries are of great value, primarily as a source for caviar, but also for flesh. [42] Several species of sturgeon are harvested for their roe which is processed into caviar—a delicacy, and the reason why caviar-producing sturgeons are among the most valuable and endangered of all wildlife resources. [43]
Shortnose sturgeon spawn in moving freshwater water, over rubble or gravel bottoms. Time of spawning varies by latitude and is likely based on water temperatures in the range from 6.5–15 °C (43.7–59.0 °F); this may be as early as January in South Carolina or as late as May in Canada.
In the late fall, the sturgeon migrate out of spawning rivers and into the Gulf of Mexico. [7] For all populations and subspecies of sturgeon, there are spawning migrations into freshwater in early spring and movement into salt water in the fall. Timing and the unusual migratory behavior of sturgeon is a result of temporal water temperature ...
Chinese sturgeon in Dalian Laohutan Ocean Park. Most sturgeon spawn in fresh water and migrate to salt water to mature. The Chinese sturgeon can be considered a large freshwater fish, although it spends part of its lifecycle in seawater, like the salmon, [9] except Chinese sturgeon spawn multiple times throughout their lives.
Nov. 10—KETTLE FALLS, Wash. — Standing at one end of a folding table, Derick Largin handled a small white sturgeon carefully, checking its back for a tag. Then he measured it, from snout to tail.
Atlantic sturgeon under six years of age stay in the brackish water where they were born before moving into the ocean. They may be 3–5 ft (0.91–1.52 m) long at this stage. In areas where shortnose sturgeon are also present, the adults of that species can be, and historically were for centuries, confused with immature Atlantic sturgeon. When ...
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