Acipenser fulvescens, commonly known as the lake sturgeon, is a large, ancient fish species belonging to the family Acipenseridae. It is one of the largest freshwater fish in North America, reaching a maximum size of 274.0 cm. This species is a long-lived, slow-growing fish that plays a vital role in the ecosystems it inhabits.
Description & Characteristics
Acipenser fulvescens is characterized by its elongated, torpedo-shaped body and five rows of bony plates, or scutes, running along its back and sides. The snout is long and pointed, and the mouth is located on the underside of the head. Lake sturgeon have a distinctive barbel on the underside of their snout, which they use to sense prey. They are typically grayish-brown to olive in color, with a lighter underside.
Habitat and Occurrence
Acipenser fulvescens is found in large rivers and lakes across North America. These fish prefer habitats with a sandy or rocky bottom and a moderate current. They are typically found in depths of 5.0 – 9.0 meters, often congregating near the bottom of these aquatic ecosystems.
Taxonomy
Acipenser fulvescens belongs to the Class: Chondrostei, Order: Acipenseriformes, and Family: Acipenseridae. This family is known for its ancient lineage, dating back to the Mesozoic Era. The Class Chondrostei includes fish with a cartilaginous skeleton, while the Order Acipenseriformes encompasses sturgeons and paddlefish.
Feeding
Acipenser fulvescens is an opportunistic bottom feeder that primarily preys on invertebrates, such as insects, crustaceans, and mollusks. They also consume small fish and other aquatic organisms. Their diet varies depending on the availability of prey and their size.
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