Fisheries Program

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Our fisheries researchers are world-class scientists. They conduct cutting-edge research to provide fisheries resource managers the scientific information they need to protect, restore, and enhance our Nation’s fisheries and their habitats.

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Imperiled Species Research

Imperiled Species Research

Forty percent of all fish species in North America are at risk of extinction. USGS research is crucial to protect and manage at-risk species and healthy fish populations into the future.

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Drought and Ecological Flows

Drought and Ecological Flows

As part of the USGS Fisheries program, ecological flows, or the relationships between quality, quantity, and timing of water flows and ecological response of aquatic biota and ecosystems; and related ecosystem services are being investigated.

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Fisheries Research

USGS scientists study life history, population ecology, and conservation and restoration strategies for aquatic species and the habitats that sustain them.

Aquatic Habitats

Aquatic Species

Aquatic Ecosystem Conservation

Advanced Tools and Technologies

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News

Date published: March 13, 2017

Water managers explore new strategies to protect fish in California’s Bay Delta

The water in the Delta arrives primarily from the Sacramento and San Joaquin Rivers, supplying water for more than 22 million people. This water source supports California’s trillion-dollar economy—the sixth largest in the world—and its $27 billion agricultural industry.

Date published: November 16, 2016

USGS Study Reveals Interactive Effects of Climate Change, Invasive Species on Native Fish

A new USGS study shows non-native Brown Trout can place a burden on native Brook Trout under the increased water temperatures climate change can cause.

Publications

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Year Published: 2020

Effects of harmful algal blooms and associated water-quality on endangered Lost River and shortnose suckers

Anthropogenic eutrophication contributes to harmful blooms of cyanobacteria in freshwater ecosystems worldwide. In Upper Klamath Lake, Oregon, massive blooms of Aphanizomenon flos-aquae and smaller blooms of other cyanobacteria are associated with cyanotoxins, hypoxia, high pH, high concentrations of ammonia, and potentially hypercapnia...

Burdick, Summer M.; Hewitt, David A.; Martin, Barbara A.; Schenk, Liam N.; Rounds, Stewart

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Year Published: 2020

Juvenile Lost River and shortnose sucker year-class formation, survival, and growth in Upper Klamath Lake, Oregon, and Clear Lake Reservoir, California—2018 monitoring report

Executive SummaryPopulations of federally endangered Lost River (Deltistes luxatus) and shortnose suckers (Chasmistes brevirostris) in Upper Klamath Lake, Oregon, and Clear Lake Reservoir (hereinafter Clear Lake), California, are experiencing long-term decreases in abundance. Upper Klamath Lake populations are decreasing not only because of adult...

Bart, Ryan J.; Burdick, Summer M.; Hoy, Marshal S.; Ostberg, Carl O.
Bart, R.J., Burdick, S.M., Hoy, M.S., and Ostberg, C.O., 2020, Juvenile Lost River and shortnose sucker year-class formation, survival, and growth in Upper Klamath Lake, Oregon, and Clear Lake Reservoir, California—2018 monitoring report: U.S. Geological Survey Open-File Report 2020–1064, 33 p., https://doi.org/10.3133/ofr20201064.

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Year Published: 2020

Fish and habitat assessment in Rock Creek, Klickitat County, southeastern Washington, 2018

Executive SummaryNative steelhead (anadromous form of rainbow trout [Oncorhynchus mykiss]) and bridgelip sucker (Catostomus columbianus) were historically used by the Kah-miltpah (Rock Creek) Band for sustenance, trade, and traditional practices in Rock Creek, a tributary to the Columbia River in southeastern Washington State. Rock Creek flows...

Hardiman, Jill M.
Hardiman, J.M., 2020, Fish and habitat assessment in Rock Creek, Klickitat County, southeastern Washington, 2018: U.S. Geological Survey Open-File Report 2020–1051, 44 p., including appendixes, https://doi.org/10.3133/ofr20201051.