Author Archives: Andrew Rypel

About Andrew Rypel

Andrew L. Rypel is a Professor and the Peter B. Moyle and California Trout Chair of coldwater fish ecology at the University of California, Davis. He is a faculty member in the Department of Wildlife, Fish & Conservation Biology and Director of the Center for Watershed Sciences.

Endangered Freshwater Fishes: Does California Lead the World?

Posted on June 18, 2023 by Andrew Rypel

By Peter B. Moyle & Robert A. Leidy See Moyle and Leidy (2023) for much more detailed version of this essay. https://doi.org/10.1017/9781108758826 Few things give the authors of this essay more pleasure than swimming in a California stream on a … Continue reading →

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Facing the Dragon: California’s Nasty Ecological Debts

Posted on June 11, 2023 by Andrew Rypel

By Andrew L. Rypel “Every time you borrow money, you’re robbing your future self.” ~N. Morris When I was younger, a close friend of mine struggled with a crippling debt. It was during that unique period shortly before and after … Continue reading →

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Water Wasted to the Sea?

Posted on June 4, 2023 by Andrew Rypel

By James E. Cloern, Jane Kay, Wim Kimmerer, Jeffrey Mount, Peter B. Moyle and Anke Müeller-Solger This essay is a condensed version of one that appeared in the journal San Francisco Estuary and Watershed Science (Vol. 15, Issue 2, Article 1), … Continue reading →

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What’s the dam problem with deadbeat dams?

Posted on May 28, 2023 by Andrew Rypel

by Andrew L. Rypel, Christine A. Parisek, Jay Lund, Ann Willis, Peter B. Moyle, Sarah Yarnell, Karrigan Börk *this is a repost of a blog originally published in June 2020. Damming rivers was once a staple of public works and … Continue reading →

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Monster Fish: Lessons for Sturgeon Management in California

Posted on May 14, 2023 by Andrew Rypel

By Peter B. Moyle & Andrew L. Rypel If you ever watched National Geographic television and are interested fishes and rivers, you likely have some familiarity with Dr. Zeb Hogan. He hosted a series of shows on giant freshwater fishes, … Continue reading →

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Hatcheries alone cannot save species and fisheries

Posted on April 30, 2023 by Andrew Rypel

By Andrew L. Rypel and Peter B. Moyle The photo is a common one (Fig 1). Large numbers of fish are being released into a river, stream or estuary – products of a fish hatchery. A politician or government leader … Continue reading →

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Lake Tulare (and its fishes) shall rise again

Posted on April 16, 2023 by Andrew Rypel

By Peter B. Moyle “Agriculture has claimed and taken away our former fishing conditions and we have but little water left for fish life within reach of the common people.” ~S.L.N. Ellis, 1922. “When nature provides more water than storage … Continue reading →

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Perspectives on DairyMAR

Posted on April 9, 2023 by Andrew Rypel

By Thomas Harter and Helen Dahlke Managed Aquifer Recharge (MAR) to not only store water but also to prevent unwanted flooding. In the recent executive order (N-4-23), governor Newsom provided a near-blanket permit for water managers to divert surface water … Continue reading →

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New methods emerging for water management in California

Posted on April 1, 2023 by Andrew Rypel

by Elsa Cailleach Some of you might have noticed it’s been rainy outside lately – alot! Amazingly, the long-desired string of atmospheric rivers is now plaguing the previously drought-ridden state with more water than anyone knows what to do with! … Continue reading →

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This Drought is Dead – Long Live the Drought

Posted on March 26, 2023 by Andrew Rypel

by Jay Lund and Andrew L. Rypel Floods and droughts are not opposites and can occur simultaneously. This occurs often in California and is especially well-illustrated this year. Floods, droughts, and water scarcity are different. Floods are too much water … Continue reading →

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