Brent Knights (Former Employee)
Science and Products
Filter Total Items: 48
USGS Illinois River Monitoring and Evaluation
No abstract available.
Authors
Travis J. Harrison, Kevin D. Hop, Enrika Hlavacek, Brent C. Knights
USGS Telemetry Project
Telemetry of acoustically tagged bigheaded carp (i.e., bighead carp Hypophthalmichthys nobilis and silver carp H. molitrix) and surrogate fish species has become an invaluable tool in management for these species in the upper Illinois Waterway Systems (i.e., upper Illinois River, lower Des Plaines River, and Chicago Area Waterway System). For example, movement probabilities between adjacent naviga
Authors
Brent C. Knights, Marybeth K. Brey, Jessica C. Stanton, Travis J. Harrison, Douglas Appel, Enrika Hlavacek, James J. Duncker
Lock operations influence upstream passages of invasive and native fishes at a Mississippi River high-head dam
Asian carps continue to expand their range in North America, necessitating efforts to limit the spread and establishment of reproducing populations. Mississippi River Lock and Dam 19 is a high-head dam that represents a population ‘pinch-point’ as passage through the lock chamber is the only means by which fishes can complete upstream movement. As such, this location could be a pivotal control poi
Authors
Andrea K. Fritts, Brent C. Knights, Jessica C. Stanton, Amanda S. Milde, Jonathan M. Vallazza, Marybeth K. Brey, Sara J. Tripp, Thomas E. Devine, Wesley Sleeper, James T. Lamer, Kyle J. Mosel
USGS Illinois River monitoring and evaluation
Asian carp monitoring and contract removal will continue throughout the Upper Illinois Waterway system as needed for adaptive management to mitigate, control, and contain Asian carp. Compiling data from monitoring and removal efforts into a centralized database (Illinois River Catch Database application) facilitates data standardization, quality, accessibility, sharing, and analysis to aid in Asia
Authors
Travis J. Harrison, Kevin D. Hop, Enrika Hlavacek, Brent C. Knights
USGS telemetry database and analyses in support of SEAcarP
No abstract available.
Authors
Brent C. Knights, Marybeth K. Brey, Jessica C. Stanton, Travis J. Harrison, Timothy J. Fox, Enrika Hlavacek, James J. Duncker
USGS real-time telemetry in support of management
No abstract available.
Authors
Brent C. Knights, Marybeth K. Brey, Douglas Appel, Travis J. Harrison, James J. Duncker
USGS geospatial support for unified fishing method
No abstract available.
Authors
Kevin D. Hop, Andrew C. Strassman, Jonathan M. Vallazza, Brent C. Knights
USGS Illinois River catch database and visualization
No abstract available.
Authors
Enrika Hlavacek, Travis J. Harrison, Brent C. Knights, Marybeth K. Brey
Estimating the degree to which distance and temperature differences drive changes in fish community composition over time in the upper Mississippi River
Similarity in community composition declines as distance between locations increases, a phenomenon that has been observed in a wide variety of freshwater, marine and terrestrial ecosystems. One driver of the distance-similarity relationship is the presence of environmental gradients that alter the suitability of sites for particular species. Although some environmental gradients, such as geology
Authors
James H. Larson, Jonathan M. Vallazza, Brent C. Knights
Influence of a high-head dam as a dispersal barrier to fish community structure of the Upper Mississippi River
In river systems, high‐head dams may increase the distance‐decay of fish community similarity by creating nearly impermeable dispersal barriers to certain species from upstream reaches. Substantial evidence suggests that migratory species are impacted by dams, and most previous studies in stream/river networks have focused on small streams and headwaters. Here, we assess whether a high‐head dam (L
Authors
Rebekah L. Anderson, Cory A. Anderson, James H. Larson, Brent C. Knights, Jonathan M. Vallazza, Sean E. Jenkins, James T. Lamer
Development of a quantitative PCR method for screening ichthyoplankton samples for bigheaded carps
Monitoring ichthyoplankton is useful for identifying reproductive fronts and spawning locations of bigheaded carps (Hypophthalmichthys spp.). Unfortunately, sorting and identifying ichthyoplankton to monitor for bigheaded carp reproduction is time consuming and expensive. Traditional methods require frequent egg-larvae sampling, sorting of all samples to obtain presumptively identified bigheaded c
Authors
Andrea K. Fritts, Brent C. Knights, James H. Larson, Jon Amberg, Christopher M. Merkes, Tariq Tajjioui, Steven E. Butler, Matthew J. Diana, David H. Wahl, Michael J. Weber, John D. Waters
USGS geospatial support for unified fishing method
No abstract available.
Authors
Kevin D. Hop, Andrew C. Strassman, Jonathan M. Vallazza, Brent C. Knights
Science and Products
Filter Total Items: 48
USGS Illinois River Monitoring and Evaluation
No abstract available.
Authors
Travis J. Harrison, Kevin D. Hop, Enrika Hlavacek, Brent C. Knights
USGS Telemetry Project
Telemetry of acoustically tagged bigheaded carp (i.e., bighead carp Hypophthalmichthys nobilis and silver carp H. molitrix) and surrogate fish species has become an invaluable tool in management for these species in the upper Illinois Waterway Systems (i.e., upper Illinois River, lower Des Plaines River, and Chicago Area Waterway System). For example, movement probabilities between adjacent naviga
Authors
Brent C. Knights, Marybeth K. Brey, Jessica C. Stanton, Travis J. Harrison, Douglas Appel, Enrika Hlavacek, James J. Duncker
Lock operations influence upstream passages of invasive and native fishes at a Mississippi River high-head dam
Asian carps continue to expand their range in North America, necessitating efforts to limit the spread and establishment of reproducing populations. Mississippi River Lock and Dam 19 is a high-head dam that represents a population ‘pinch-point’ as passage through the lock chamber is the only means by which fishes can complete upstream movement. As such, this location could be a pivotal control poi
Authors
Andrea K. Fritts, Brent C. Knights, Jessica C. Stanton, Amanda S. Milde, Jonathan M. Vallazza, Marybeth K. Brey, Sara J. Tripp, Thomas E. Devine, Wesley Sleeper, James T. Lamer, Kyle J. Mosel
USGS Illinois River monitoring and evaluation
Asian carp monitoring and contract removal will continue throughout the Upper Illinois Waterway system as needed for adaptive management to mitigate, control, and contain Asian carp. Compiling data from monitoring and removal efforts into a centralized database (Illinois River Catch Database application) facilitates data standardization, quality, accessibility, sharing, and analysis to aid in Asia
Authors
Travis J. Harrison, Kevin D. Hop, Enrika Hlavacek, Brent C. Knights
USGS telemetry database and analyses in support of SEAcarP
No abstract available.
Authors
Brent C. Knights, Marybeth K. Brey, Jessica C. Stanton, Travis J. Harrison, Timothy J. Fox, Enrika Hlavacek, James J. Duncker
USGS real-time telemetry in support of management
No abstract available.
Authors
Brent C. Knights, Marybeth K. Brey, Douglas Appel, Travis J. Harrison, James J. Duncker
USGS geospatial support for unified fishing method
No abstract available.
Authors
Kevin D. Hop, Andrew C. Strassman, Jonathan M. Vallazza, Brent C. Knights
USGS Illinois River catch database and visualization
No abstract available.
Authors
Enrika Hlavacek, Travis J. Harrison, Brent C. Knights, Marybeth K. Brey
Estimating the degree to which distance and temperature differences drive changes in fish community composition over time in the upper Mississippi River
Similarity in community composition declines as distance between locations increases, a phenomenon that has been observed in a wide variety of freshwater, marine and terrestrial ecosystems. One driver of the distance-similarity relationship is the presence of environmental gradients that alter the suitability of sites for particular species. Although some environmental gradients, such as geology
Authors
James H. Larson, Jonathan M. Vallazza, Brent C. Knights
Influence of a high-head dam as a dispersal barrier to fish community structure of the Upper Mississippi River
In river systems, high‐head dams may increase the distance‐decay of fish community similarity by creating nearly impermeable dispersal barriers to certain species from upstream reaches. Substantial evidence suggests that migratory species are impacted by dams, and most previous studies in stream/river networks have focused on small streams and headwaters. Here, we assess whether a high‐head dam (L
Authors
Rebekah L. Anderson, Cory A. Anderson, James H. Larson, Brent C. Knights, Jonathan M. Vallazza, Sean E. Jenkins, James T. Lamer
Development of a quantitative PCR method for screening ichthyoplankton samples for bigheaded carps
Monitoring ichthyoplankton is useful for identifying reproductive fronts and spawning locations of bigheaded carps (Hypophthalmichthys spp.). Unfortunately, sorting and identifying ichthyoplankton to monitor for bigheaded carp reproduction is time consuming and expensive. Traditional methods require frequent egg-larvae sampling, sorting of all samples to obtain presumptively identified bigheaded c
Authors
Andrea K. Fritts, Brent C. Knights, James H. Larson, Jon Amberg, Christopher M. Merkes, Tariq Tajjioui, Steven E. Butler, Matthew J. Diana, David H. Wahl, Michael J. Weber, John D. Waters
USGS geospatial support for unified fishing method
No abstract available.
Authors
Kevin D. Hop, Andrew C. Strassman, Jonathan M. Vallazza, Brent C. Knights