Fish Of The Day

Fish of the Day

Today's fish of the day is the lake sturgeon!

The lake sturgeon, also called the rock sturgeon, and known by scientific name Acipenser fulvescens is one of the best known North American sturgeon species! Found in and around the great lakes, and then across the Mississippi river and Erie canal. Found in 5 differing Canadian provinces and across 24 states stretching from Alabama to Michigan, and as far East as New York. These fish are benthic, spending their time along the bottom of the lake bed, but during spawning these fish will migrate thousands of miles to go back to the stream they were born in.

Like all sturgeon, they are considered living fossils, as sturgeon first appeared in the fossil record upwards of 150 million years ago, with the fish now appearing nearly identical to these ancestors. These fish can get 7 feet or longer, with most being only 4 to 6 feet in length, making them some of the largest sturgeon in North America. Their diet is made up of various invertebrates such as: larvae, small crustaceans, and worms, which they can find along the benthic lake and river beds. The 4 barbels found on these fish have taste buds, which are used to determine what is under their mouth, before they use their prehensile lips to suck up food. When food becomes scarce, these fish are known for migrating for better feeding, which happens semi frequently around the year.

The life cycle of the lake sturgeon is similar to that of most other sturgeons. They begin life as eggs laid in the location their parents were born, in fast paced river streams with lots of flat rocks. The eggs themselves are a bright yellow color, although as the eggs matures this will turn an olive and eventually brown over the course of about 2 weeks. Then they live as larvae only 10mm long, living in and around the dark underside of rocks. After this, as juveniles they will swim to lake environments, where they will spend the majority of their life cycle. These fish can live 55 years long in males and around 150 years for females, with sexual maturity being achieved at an age of around 10 years in males and 30 years in females. Breeding and spawning only happens intermittently every handful of years, and go through around 10 spawning seasons throughout their lifecycle.

For a fun fact to end on for these fish because I'm particularly fond of them, when they reach the stream they will spawn in, these fish are known to porpoise, jumping several feet into the air to end their long journey. That's the lake sturgeon everybody! Have a wonderful day!