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Sturgeons are long-lived, late-maturing fishes with distinctive characteristics, such as a heterocercal caudal fin similar to those of sharks, and an elongated, spindle-like body that is smooth-skinned, scaleless, and armored with five lateral rows of bony plates called scutes.
23 lip 2021 · In the 1980s, biologists set out to accomplish what their predecessors had failed to do in the late 1800s: Bring lake sturgeon back to their habitats. Restoration efforts kicked off in the Mississippi, Missouri and St. Louis rivers, with Borkholder joining the last one in the early 1990s.
1 kwi 2019 · “A remarkably ugly fish,” “remarkably cool,” “really amazing,” “basically dinosaurs” and “sort of like zombies” — these were the terms that environmental historian Nancy Langston used to describe the sturgeon.
Tematy dnia
16 maj 2022 · There are prehistoric giants gliding through the depths of some U.S. rivers. A type of fish called lake sturgeon has been around since the time of the dinosaurs.
17 sie 2022 · Scientists and students embarking on a census of Georgia lake sturgeon have found three females with mature eggs — an indication that the prehistoric fish may be reproducing in Georgia for the first time in a half-century.
28 maj 2024 · Epochs-old sturgeon fossils are remarkably the same as today’s Atlantic sturgeon—a living relic from prehistoric times. The Atlantic sturgeon’s (Acipenser oxyrinchus oxyrinchus) body is covered with five rows of bony plates called scutes, which look like the armor found on certain dinosaur fossils.
The Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus) is a member of the family Acipenseridae, and, along with other sturgeon, it is sometimes considered a living fossil. The Atlantic sturgeon is one of two subspecies of A. oxyrinchus, the other being the Gulf sturgeon (A. o. desotoi).
