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Consequences of changing water clarity on the fish and fisheries of the Laurentian Great Lakes

August 31, 2021
Human-driven environmental change underlies recent changes in water clarity in many of the world’s great lakes, yet our understanding of the consequences of these changes on the fish and fisheries they support remains incomplete. Herein, we offer a framework to organize current knowledge, guide future research, and help fisheries managers understand how water clarity can affect their valued populations. Emphasizing Laurentian Great Lakes findings where possible, we describe how changing water clarity can directly affect fish populations and communities by altering exposure to ultraviolet radiation, foraging success, predation risk, reproductive behavior, or territoriality. We also discuss how changing water clarity can affect fisheries harvest and assessment through effects on fisher behavior and sampling efficiency (i.e., catchability). Finally, we discuss whether changing water clarity can affect understudied aspects of fishery performance, including economic and community benefits. We conclude by identifying generalized predictions and discuss their implications for priority research questions for the Laurentian Great Lakes. Even though the motivation for this work was regional, the breadth of the review and generality of the framework are readily transferable to other freshwater and marine habitats.

Citation Information

Publication Year 2021
Title Consequences of changing water clarity on the fish and fisheries of the Laurentian Great Lakes
DOI 10.1139/cjfas-2020-0376
Authors David Bunnell, Stuart A. Ludsin, Roger L. Knight, Lars G. Rudstam, Craig E. Williamson, Tomas O. Hook, Paris D. Collingsworth, Barry M. Lesht, Richard P. Barbiero, Anne E. Scofield, Edward S. Rutherford, Layne Gaynor, Henry A. Vanderploeg, Marten A. Koops
Publication Type Article
Publication Subtype Journal Article
Series Title Canadian Journal of Fisheries and Aquatic Sciences
Series Number
Index ID 70225610
Record Source USGS Publications Warehouse
USGS Organization Great Lakes Science Center

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