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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 in order to protect, restore, and enhance our Nation’s fisheries and their habitats.
After 14,000 years of dominance, Glacier National Park’s (GNP) greatest native aquatic predator is at high risk of extirpation (local extinction) in several lakes on the western slopes of the Continental Divide. The decline of threatened bull trout in GNP is directly attributed to the invasion and establishment of nonnative lake trout, which consistently displace bull trout in systems where...
This website provides access to the list of imperiled freshwater and diadromous fishes of North America as determined by the 2008 American Fisheries Society (AFS) Endangered Species Committee (ESC) on Fishes.
Piscicides have been used in Rocky Mountain stream and lakes to restore native fish populations. In the last two decades concerns over piscicide effects to non-target organisms, primarily aquatic invertebrates, has increased. Although piscicides have been used for more than 70 years the impact to invertebrate assemblages has not been well studied and is largely unknown. Given the importance a...
Understanding disease to support the management and restoration of aquatic species.
Research on stressors and habitat requirements of imperiled aquatic species to inform their restoration.
Research and technology for restoring aquatic species and aquatic habitats.
Aquatic species diversity is the hallmark of healthy aquatic ecosystems.
These tools offer invaluable insights into fishery resource problems.
Functional relationships among aquatic species for conserving and restoring aquatic community function.
Improving fish passage is vital for restoring populations of salmon and other migratory fish.
An Online Database for IHN Virus in Pacific Salmonid Fish: MEAP-IHNV
The Molecular Epidemiology of Aquatic Pathogens (MEAP)-IHNV Database
The MEAP-IHNV database provides access to detailed data for anyone interested in IHNV molecular epidemiology, such as fish health professionals, fish culture facility managers, and academic researchers.
USGS Dam Removal Information Portal (DRIP)
The Dam Removal Information Portal is a Web site that serves information about the scientific studies associated with dam-removal projects. It is a visualization tool, including a map and interactive charts, of a dam-removal literature review designed and developed by a working group at the USGS John Wesley Powell Center for Analysis and Synthesis (Bellmore and others, 2015).
A simple web-based tool to compare freshwater fish data collected using AFS standard methods
The American Fisheries Society (AFS) recently published Standard Methods for Sampling North American Freshwater Fishes. Enlisting the expertise of 284 scientists from 107 organizations throughout Canada, Mexico, and the United States, this text was developed to facilitate comparisons of fish data across regions or time. Here we describe...Bonar, Scott A.; Mercado-Silva, Norman; Rahr, Matt; Torrey, Yuta T.; Cate, Averill
Detection probabilities of electrofishing, hoop nets, and benthic trawls for fishes in two western North American rivers
Research comparing different sampling techniques helps improve the efficiency and efficacy of sampling efforts. We compared the effectiveness of three sampling techniques (small-mesh hoop nets, benthic trawls, boat-mounted electrofishing) for 30 species in the Green (WY, USA) and Kootenai (ID, USA) rivers by estimating conditional detection...Smith, Christopher D.; Quist, Michael C.; Hardy, Ryan S.
Assessment of general health of fishes collected at selected sites in the Great Lakes Basin In 2012
During the past decade, there has been a substantive increase in the detection of “emerging contaminants”, defined as a new substance, chemical, or metabolite in the environment; or a legacy substance with a newly expanded distribution, altered release, or a newly recognized effect (such as endocrine disruption). Emerging contaminants...Mazik, Patricia M.; Braham, Ryan P.; Hahn, Cassidy M.; Blazer, Vicki
Use of glacier river-fed estuary channels by juvenile coho salmon: transitional or rearing habitats?
Estuaries are among the most productive ecosystems in the world and provide important rearing environments for a variety of fish species. Though generally considered important transitional habitats for smolting salmon, little is known about the role that estuaries serve for rearing and the environmental conditions important for salmon. We...Hoem Neher, Tammy D.; Rosenberger, Amanda E.; Zimmerman, Christian E.; Walker, Coowe M.; Baird, Steven J.
A nuclear DNA perspective on delineating evolutionarily significant lineages in polyploids: the case of the endangered shortnose sturgeon (Acipenser brevirostrum)
The shortnose sturgeon, Acipenser brevirostrum, oft considered a phylogenetic relic, is listed as an “endangered species threatened with extinction” in the US and “Vulnerable” on the IUCN Red List. Effective conservation of A. brevirostrum depends on understanding its diversity and evolutionary processes, yet challenges associated with the...King, Timothy L.; Henderson, Anne P.; Kynard, Boyd E.; Kieffer, Micah C.; Peterson, Douglas L.; Aunins, Aaron W.; Brown, Bonnie L.
Channel catfish (Ictalurus punctatus) leukocytes express estrogen receptor isoforms ERα and ERβ2 and are functionally modulated by estrogens
Estrogens are recognized as modulators of immune responses in mammals and teleosts. While it is known that the effects of estrogens are mediated via leukocyte-specific estrogen receptors (ERs) in humans and mice, leucocyte-specific estrogen receptor expression and the effects of estrogens on this cell population is less explored and poorly...Iwanowicz, Luke R.; Stafford, James L.; Patiño, Reynaldo; Bengten, Eva; Miller, Norman W.; Blazer, Vicki
Development and characterization of 16 polymorphic microsatellite loci for the Alaska blackfish (Esociformes: Dallia pectoralis)
Blackfishes (Esociformes: Esocidae: Dallia), small fishes with relictual distributions, are unique in being the only primary freshwater fish genus endemic to Beringia. Although the number of species of Dallia is debated, disjunct populations and distinct mitochondrial divisions that predate the end of the last glacial maximum are apparent. We...Campbell, Matthew A.; Sage, George K.; DeWilde, Rachel L.; López, J. Andres; Talbot, Sandra L.
Physiological and ecological effects of increasing temperature on fish production in lakes of Arctic Alaska
Lake ecosystems in the Arctic are changing rapidly due to climate warming. Lakes are sensitive integrators of climate-induced changes and prominent features across the Arctic landscape, especially in lowland permafrost regions such as the Arctic Coastal Plain of Alaska. Despite many studies on the implications of climate warming, how fish...Carey, Michael P.; Zimmerman, Christian E.
Experimental methods fail to address the questions posed in studies of surgical techniques
No abstract available.Mulcahy, Daniel M.
Recolonization of the intertidal and shallow subtidal community following the 2008 eruption of Alaska’s Kasatochi Volcano
The intertidal and nearshore benthic communities of Kasatochi Island are described following a catastrophic volcanic eruption in 2008. Prior to the eruption, the island was surrounded by a dense bed of canopy-forming dragon kelp Eualaria fistulosa which supported a productive nearshore community. The eruption extended the coastline of the island...Jewett, S.C.; Drew, Gary S.
Evaluation of potential protective factors against metabolic syndrome in bottlenose dolphins:feeding and activity patterns of dolphins in Sarasota Bay, Florida
Free-ranging bottlenose dolphins (Tursiops truncatus) living in Sarasota Bay, Florida appear to have a lower risk of developing insulin resistance and metabolic syndrome compared to a group of dolphins managed under human care. Similar to humans, differences in diet and activity cycles between these groups may explain why Sarasota dolphins have...Wells, Randall S.; McHugh, Katherine A.; Douglas, David C.; Shippee, Steve; McCabe, Elizabeth Berens; Barros, Nélio B.; Phillips, Goldie T.
Sampling design for long-term regional trends in marine rocky intertidal communities
Probability-based designs reduce bias and allow inference of results to the pool of sites from which they were chosen. We developed and tested probability-based designs for monitoring marine rocky intertidal assemblages at Glacier Bay National Park and Preserve (GLBA), Alaska. A multilevel design was used that varied in scale and inference. The...Irvine, Gail V.; Shelley, Alice
In 2018, USGS and partners completed an incredible feat against a harmful aquatic invasive species when over 240,000 pounds of invasive Silver Carp and Bighead Carp were removed from Creve Coeur Lake in Maryland Heights, Missouri.
Out with the old, in with the new! A state-of-the-art aquatic science laboratory is being built on the shores of Lake Huron at the USGS Hammond Bay Biological Station (HBBS), one of seven field stations of the USGS Great Lakes Science Center, operated in partnership with the Great Lakes Fishery Commission. To make way for the new laboratory, four old buildings on the HBBS property needed to be...
A biological science technician collects pallid sturgeon free embryos from the sampling nets in the experimental streams at the Columbia Environmental Research Center.
Student Services contractor, Tanner, Cox releasing a pallid sturgeon on the Yellowstone River.
Watch as the USGS Hammond Bay Biological Station water tank and pump house are constructed from the ground up! This short video features time lapse photography of the 1-million gallon water tank and pump house constructed to supply water to a state-of-the-art aquatic science laboratory. Laboratory construction will occur over the next several years and will also be chronicled with time lapse...
Permanent Site: E2 West Transect; Depth: 14.6 Meters (47.8 Feet); Distance from river mouth: 0.9 Kilometers (0.5 Miles) east; Pre/Post Dam Removal: 5 years post-dam removal; Lat/Long: 48.15653002, -123.56197605; Site Description: This is one of our deeper sites. Substrate is mainly gravel/cobble with scattered boulders. A few small red and brown seaweeds, mainly acid kelp Desmarestia spp. (0:...
Permanent Site: E2 East Transect; Depth: 14.3 Meters (46.8 Feet); Distance from river mouth: 0.9 Kilometers (0.5 Miles) east; Pre/Post Dam Removal: 5 years post-dam removal; Lat/Long: 48.15653002,-123.56130401; Site Description: This is one of our deeper sites. Substrate is mainly gravel/cobble with an occasional boulder. A few brown acid kelps (Desmarestia spp. at 0:06 seconds) and red...
Permanent Site: D2 West Transect; Depth: 12.8 Meters (41.9 Feet); Distance from river mouth: 0.3 Kilometers (0.2 Miles); Pre/Post Dam Removal: 5 years post-dam removal Lat/Long: 48.15233001,-123.56896603; Site Description: This site is right off the mouth of the river. Substrate is mainly gravel with some cobble. Dead clam shells are scattered everywhere (2:14 seconds). Small woody debris is...
Permanent Site: J1 West Transect; Depth: 9.8 Meters (32.3 Feet); Distance from river mouth: 6.6 Kilometers (4.1 Miles) east; Pre/Post Dam Removal: 5 years post-dam removal; Lat/Long: 48.13607725,-123.48002186; Site Description: This site is medium depth. Substrate is mainly a gravel/sand mixture. Both red (0:25 seconds) and brown seaweed growth is dense and appears to be at pre-dam removal...
USGS Expertise and Science Leads to Ballast Water Management Solutions
USGS and Chinese Fish Health Specialists Meet in the People's Republic of China to Discuss Fish Health
Scientists Continue to Gain Insights into Endangered Suckers in the Klamath Basin
Conducting Risk Assessments for the Reintroduction of Salmon in the Upper Columbia River
Science to Support Salmon Recovery Efforts in the Puget Sound
In Memoriam - Dr. William "Dave" Woodson, 1956-2017
Dr. Diane Elliott Retires After Long Distinguished Career
Exploring the Role of Non-Native American Shad in the Columbia River Basin
Dr. Jim Winton Retires After Long Distinguished Career
Understanding the Effects of Temperature on Diseases in Fish
Early Detection Monitoring May Not Be Sufficient for Invasive Mussels in the Columbia River Basin
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.