These Fish May Live for Centuries

Lake sturgeon in the Great Lakes may live far longer than previously believed, with new research suggesting many routinely surpass 200 years and some approach 300. A study by the Michigan Department of Natural Resources and Michigan State University challenges older age estimates that relied on growth rings in fin spines, which become harder to interpret in very old fish. Using long-term records from tagged sturgeon measured repeatedly over many years and mathematical models comparable to those used for Greenland sharks, researchers created a more accurate lifespan picture. The findings could improve conservation planning because lake sturgeon mature slowly and reproduce infrequently, making recovery sensitive to survival rates.