Fish and Aquatic Species
Fish and Aquatic Species
The USGS is the only federal science agency dedicated to providing independent research that supports the conservation and management of the nation’s fisheries. Our researchers develop and apply specialized tools such as genetic tracking, hydrologic modeling, and fish disease diagnostics to answer the most pressing questions facing federal, Tribal, state, and local resource managers.
Filter Total Items: 153
Comprehensive Sturgeon Research Project (CSRP)
The Comprehensive Sturgeon Research Project (CSRP) is a multidisciplinary project conducted in cooperation with the U.S. Army Corps of Engineers, Missouri River Recovery Program–Integrated Science Program. CERC scientists are working with river scientists and managers to develop methods, baseline information, and research approaches that are critical contributions to recovery success of the...
Computer-Assisted Sperm Motion Analysis in Measuring Reproductive Effects in Bass
The objective of this research is to assess the sensitivity of female and male LMB reproductive capabilities at the time of year when they are physiologically preparing for spawning season (also known as gonad recrudescence).
Validation of Zinc and Nickel Biotic Ligand Models Based on Toxicity Testing in Natural Waters with Ceriodaphina dubia
Most states use outdated hardness-based criteria to regulate metals in surface waters. The slow adoption of new criteria based on biotic ligand models (BLMs) reflects uncertainty about whether these models can reliably predict toxic effects of metals on aquatic biota across the wide range of water quality conditions affecting bioavailability.
An Evaluation the Chronic Toxicity of Metals in Water and Sediment to the Unionid Mussel, Fatmucket (Lampsilis siliquoidea), in Exposures Representing Conditions in the Tri-States Mining District
The Tri-State Mining District (TSMD) is a large (about 500 sq. mi.) historical lead and zinc mining area that includes portions of Kansas, Missouri and Oklahoma. The TSMD yielded about 460 million tons of ore between 1885 and 1970, resulting in contamination of surface water, groundwater, sediments, and soils in the Spring River and Neosho River basins by lead, zinc, and other heavy metals.
An assessment of Deep Fork River Effluent Toxicity to the Unionid Mussel Fatmucket (Lampsilis siliquoidea)
Nearly 70% of the 300 mussel species in North America are endangered, threatened, of special concern, or extinct. Environmental contaminants have been identified as a contributing factor to the decline of mussel populations.
Puget Sound Fall Chinook Estuarine Utilization
The WFRC has partnered separately with both the Skagit River System Tribal Cooperative and the Nisqually Tribe to research the use of otoliths (calcium carbonate deposits beneath the brain used in hearing and balance that grow in proportion to the overall growth of the fish) as a tool in examination of Puget Sound Fall Chinook salmon life history.
Chinook Salmon (Oncorhynchus tshawytscha)
Species Studied - Chinook Salmon ( Oncorhynchus tshawytscha)
Bull Trout (Salvelinus confluentus)
Species Studied - Bull Trout ( Salvelinus confluentus)
Description of aquatic vegetation and invertebrate communities at Big Stone National Wildlife Refuge
Big Stone National Wildlife Refuge is situated within a riverine system where refuge wetlands receive sediment-laden inflows that have been associated with diminished plant communities and water quality conditions. Accordingly, improved habitat- and water-quality conditions have been recognized as overall management goals, and the collection of baseline biotic and abiotic data has been identified...
Development and validation of wetland-connectivity indicators in the U.S. Prairie Pothole Region
We are working in partnership with the U.S. Environmental Protection Agency to (1) quantify cumulative effects of prairie-pothole wetlands on stream communities; (2) explore relationships between aquatic-system connectivity and genetic-, species-, and ecosystem-scale biological diversity at watershed and landscape scales; (3) develop mapping unit descriptors based on biotic community traits for...
Restoration of wetland invertebrates to improve wildlife habitat in Minnesota
Northern Prairie Wildlife Research Center (NPWRC) is investigating limitations to restoring abundant aquatic macroinvertebrate populations to Minnesota wetlands and shallow lakes. Recent research on larger more permanent wetlands in Minnesota indicates that there have been decreases in quality of wetlands of use by ducks. That research also describes a decline in abundance of amphipods, a shrimp...
Pallid Sturgeon Habitat Dynamics
CERC scientists apply advanced measurement and modeling approaches to quantifying habitats in large rivers. Our research has been applied to improving the understanding of the reproductive ecology of the endangered pallid sturgeon ( Scaphirhynchus albus) in the Missouri River.