Crews Dump Limestone Into Detroit River For Sturgeon Habitat

DETROIT (AP) — Crews have dumped 25,000 tons of limestone blocks into the Detroit River as part of a mission to restore lake sturgeon.

The ancient fish can reach 7 feet long, weigh more than 300 pounds and live longer than a century. They once were plentiful in the Great Lakes but fell victim to overfishing and habitat destruction. They’re now threatened or endangered in most of the region.

The limestone deposit added 4 acres of spawning reef areas for sturgeon near Detroit’s Belle Isle.

The federal government has provided about $10 million for a series of reef construction projects in the St. Clair and Detroit rivers.

Experts say the reefs are attracting egg-laying females. But because sturgeon mature slowly, it could take decades to determine whether the efforts are boosting the population.

 

Copyright 2017 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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