Fisheries Program


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.

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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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.


Year Published: 2019

Phylogeography and evolution of infectious hematopoietic necrosis virus in China

Infectious hematopoietic necrosis virus (IHNV) is a well-known rhabdoviral pathogen of salmonid fish. In this study, a comprehensive analysis of 40 IHNV viruses isolated from thirteen fish farms in nine geographically dispersed Chinese provinces during 2012 to 2017 is presented. Identity of nucleotide and amino acid sequences among all the...

Xu, Liming; Zhao, Jingzhuang; Liu, Miao; Kurath, Gael; Breyta, Rachel B.; Ren, Guangming; Yin, Jiasheng; Liu, Hongbai; Lu, Tongyan

Year Published: 2019

A Bayesian life-cycle model to estimate escapement at maximum sustained yield in salmon based on limited information

Life-cycle models combine several strengths for estimating population parameters and biological reference points of harvested species and are particularly useful for those exhibiting distinct habitat shifts and experiencing contrasting environments. Unfortunately, time series data are often limited to counts of adult abundance and harvest. By...

Ohlberger, Jan; Brinkman, Samuel J.; Crain, Patrick; Pess, George R.; Duda, Jeffrey J.; Buehrens, Thomas W.; Quinn, Thomas P.; Hilborn , Ray

Year Published: 2018

Effects of transmitter type, tagging method, body size, and temperature on behavior, physiology, and swimming performance of juvenile Chinook salmon (Oncorhynchus tshawytscha)

The objective of this study was to assess the impact of different tagging methods and transmitter types on juvenile salmonid behavior, mortality, physiology, and swimming performance over a range of water temperatures and fish sizes.In Chapter 1, two laboratory experiments were conducted to assess maximum burst-swimming speeds, the probability of...

Perry, Russell W.; Liedtke, Theresa L.
Perry, R.W., and Liedtke, T.L., eds., 2018, Effects of transmitter type, tagging method, body size, and temperature on behavior, physiology, and swimming performance of juvenile Chinook salmon (Oncorhynchus tshawytscha): U.S. Geological Survey Open Report 2018–1186, 74 p.,