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Surviving the River: Habitat

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Michigan Environmental Education Curriculum
River and Stream Ecosystems

Sturgeon eggs need certain habitat conditions in order to survive. Sturgeon eggs are usually found in and around large rocks. This way the eggs can fall into the crevices and predators have a hard time getting at them.

The eggs also have a better chance of surviving if they are in areas where the water current is very strong. Strong currents help disperse eggs over a wide area, reducing clumping which can spread disease.

The temperature of the water in the river is also very important. If the water temperature is too low, eggs develop slowly and predators may have a chance to eat them. At temperatures above 20 degrees Celsius, eggs die at very high rates. The optimal temperature for egg survival is 14-16 degrees Celsius.

Spawning Substrate

Lake sturgeon eggs are commonly found in and around large rocks.

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