Josey Ridgway
Josey Ridgway is a Research Fish Biologist at the Columbia Environmental Research Center.
Josey Ridgway earned a Master of Science in Biology from Tennessee Technological University through the Tennessee Cooperative Fishery Research Unit, where work focused on evaluating invasive carp sampling techniques and population dynamics in Kentucky Lake and Lake Barkley. Josey joined the U.S. Department of Interior in 2016 and has since continued advancing research and management efforts aimed at controlling invasive carp populations across the Mississippi River Basin.
Current research centers on developing innovative capture methodologies—such as herding stimuli (auditory, visual, and tactual) used to concentrate invasive carp for mass removal with large‑scale netting systems. These efforts integrate behavioral and catch‑rate data derived from SONAR and telemetry technologies. In addition to field‑based removal strategies, Josey is leading work to advance SONAR applications for fisheries science and invasive carp management, including the use of consumer-grade side‑scan and live‑imaging systems to characterize fish behavior, support operational decision‑making, and improve the efficiency and effectiveness of control actions.
Professional Experience
04/2018–present Research Fish Biologist, U.S. Geological Survey, Columbia Environmental Science Center, Columbia, MO
01/2017–04/2018 Fish Biologist, U.S. Fish and Wildlife Service, Columbia Fish and Wildlife Conservation Office, Columbia, MO
08/2016–01/2017 Biological Science Technician, U.S. Fish and Wildlife Service, Columbia Fish and Wildlife Conservation Office, Columbia, MO
08/2014–08/2016 Graduate Research Assistant, Tennessee Cooperative Fishery Research Unit, 1100 N Dixie Ave, 205 Pennebaker Hall, Cookeville, TN
04/2013–08/2014 Undergraduate Research Assistant, MU McNair Scholar’s Program, 536 Clark Hall, Columbia, MO
08/2012–08/2014 Biological Science Technician, Missouri Cooperative Fish and Wildlife Research Unit, 302 Anheuser-Busch Nat. Res. Building, Columbia, MO
Education and Certifications
M.S. Biology, Tennessee Cooperative Fishery Research Unit, Department of Biology, Tennessee Technological University 2016
B.S. Fish and Wildlife Sciences—emphasis on fish, Department of Natural Resources, University of Missouri—Columbia 2014
Science and Products
Identifying overwintering habitat of silver and bighead carp in the lower Mississippi River: Implications for harvesting and population reduction Identifying overwintering habitat of silver and bighead carp in the lower Mississippi River: Implications for harvesting and population reduction
A total of 41 sites along a 58 mi reach of the Lower Mississippi River (LMR) were surveyed during winter 2022 for invasive carp aggregation.* Sites consisting of scallops closest to the dike-vegetated bank interface with deeper, slow-moving water and consistent access back to the main channel were preferred. Carp avoided strong currents, and there was no trend in depth selection other...
Authors
K. Jack Killgore, David Ruppel, Faucheux. Nick, W. Todd Slack, Amanda J.M. Oliver, Josey Lee Ridgway, Jesse Robert Fischer, Robin D. Calfee
Long-term surgery survival, body condition effects, and incision healing of Silver Carp and buffalo species comparing sedation methods across seasons Long-term surgery survival, body condition effects, and incision healing of Silver Carp and buffalo species comparing sedation methods across seasons
Objective Internal tagging for telemetry studies requires invasive surgery procedures, necessitating sufficient sedation to support animal welfare. Challenges with existing chemical sedatives have resulted in technological alternatives, including electrosedation, with these newer methods less extensively studied. Our primary objective was to understand long-term survival, body-condition...
Authors
Matthew Ross Acre, Sophia Marie Bonjour, Jacob N. Griffin, Robert Bratcher, Tyler Hessler, Dustin Broaddus, Andrew T. Mueller, Jacob Faulkner, Josey Lee Ridgway, Michael G. Iacchetta, Suzanne Colyer, Robin D. Calfee
Side-scan sonar as a tool for measuring fish populations: Current state of the science and future directions Side-scan sonar as a tool for measuring fish populations: Current state of the science and future directions
Side-scan sonar (SSS) is a powerful tool that can be used to address many key questions in fisheries science. In principle, SSS uses dual transducers to transmit a narrow-beam, wide-angle acoustic signal as the survey vessel transits an area. The intensity of reflected sound is recorded to generate an image mosaic comprised of benthic substrates and targets in the water column, including...
Authors
Josey Lee Ridgway, John A. Madsen, Jesse Robert Fischer, Robin D. Calfee, Matthew Ross Acre, David C. Kazyak
Silver carp herding: A telemetry evaluation of efficacy and implications for design and application Silver carp herding: A telemetry evaluation of efficacy and implications for design and application
Removal of invasive Silver Carp Hypophthalmichthys molitrix is a primary control action in North America. Strong avoidance responses to underwater sound and electricity have been shown to facilitate herding and mass removal of these fish. We conducted a telemetry study on a closed population of Silver Carp (i.e., 10 telemetered fish) to assess fine-scale movement responses to herding...
Authors
Josey Lee Ridgway, Matthew Ross Acre, Tyler Michael Hessler, Dustin Broaddus, Jessica Morris, Robin D. Calfee
Application of electricity and underwater acoustics to clear fish from a navigation lock during maintenance Application of electricity and underwater acoustics to clear fish from a navigation lock during maintenance
The presence of fish within navigation locks can introduce an environmental challenge for construction crews when maintenance is required. This study examined the effectiveness of a dual-deterrent fish herding technique using electricity and acoustic stimuli to reduce the abundance of fish within a navigation lock before a scheduled dewatering for maintenance. Fixed-location multi-beam...
Authors
Jose Rivera, Aaron R. Cupp, Josey Lee Ridgway, Duane Chapman, Bethany E Hoster, Matthew Ross Acre, Robin D. Calfee, Jesse Robert Fischer, James J. Duncker
An assessment of fish herding techniques: Management implications for mass removal and control of silver carp An assessment of fish herding techniques: Management implications for mass removal and control of silver carp
We assessed the effectiveness of herding techniques on adult Silver Carp Hypophthalmichthys molitrix in a tributary to the Missouri River. Sites (600 m) were contained using block nets and treated with one of five herding techniques: (1) a method commonly used by commercial fishers in the United States (commercial technique), (2) pulsed-DC electrofishing (electric technique), (3)...
Authors
Josey Lee Ridgway, Katelyn M. Lawson, Stephen August Shier, Robin D. Calfee, Duane Chapman
Semiautomated process for enumeration of fishes from recreational-grade side-scan sonar imagery Semiautomated process for enumeration of fishes from recreational-grade side-scan sonar imagery
The use of hydroacoustic techniques is increasing as scientists search for less invasive ways to monitor fish populations, and using recreational side‐scan sonar (SSS) imagery for monitoring has become more common in aquatic resource management over the last 15 years due in part to its low cost and user‐friendly interface. The time‐consuming nature of manually counting fish targets has...
Authors
Katelyn M Lawson, Josey Lee Ridgway, Andrew T. Mueller, Jacob Faulkner, Robin D. Calfee
Riverscape correlates for distribution of threatened spotfin chub Erimonax monachus in the Tennessee River Basin, USA Riverscape correlates for distribution of threatened spotfin chub Erimonax monachus in the Tennessee River Basin, USA
Globally, aquatic biodiversity is imperiled at an increasing rate, especially in diversity hotspots such as the southeastern USA. The spotfin chub Erimonax monachus is a federally threatened minnow with a disjunct distribution resulting from numerous impoundments on the Tennessee River and its tributaries in the heart of the southeastern USA. Recovery actions required to remove federal...
Authors
Joshuah S. Perkin, W. Keith Gibbs, Josey Lee Ridgway, S. Bradford Cook
Non-USGS Publications**
Ridgway, J.L., and Bettoli, P.W., 2017, Distribution, Age Structure, and Growth of Bigheaded Carps in the Lower Tennessee and Cumberland Rivers: Southeastern Naturalist, v. 16, no. 3, p. 426-442, 417.
Ridgway*, J.L., Goeckler, J.M., Morris, J., and Hammen, J.J., 2020, Diel Influences on Silver Carp Catch Rates Using an Electrified Paupier in Lentic Habitats: North American Journal of Fisheries Management.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Use and Evaluation of Stimuli for Herding Bigheaded Carps to Increase their Capture Efficiency
Mass removal of the invasive silver carp Hypophthalmichthys molitrix and bighead carp Hypophthalmichthys nobilis (collectively referred to as bigheaded carp) is a primary management action in the United States to contain population growth and reduce upstream dispersal. Efficient capture and removal techniques are required to achieve this goal, and the USGS is working to develop and evaluate such...
Invasive carp environmental DNA data from the Blackwater and Lamine rivers, Missouri, 2015 Invasive carp environmental DNA data from the Blackwater and Lamine rivers, Missouri, 2015
Data describe environmental DNA (eDNA) concentrations from invasive silver and bigheaded carp (Hypophthalmichthys spp.) in Missouri’s Blackwater and Lamine Rivers in 2015. Two, 3-day sampling trips were conducted in March and September 2015 (winter and summer samples, respectively) to collect water samples and associated water quality data. Parameters include locations of collected water...
Consumer-Grade Side-Scan Sonar Imagery of Invasive Silver Carp in a Missouri River Oxbow Lake, Creve Coeur Lake, 2023 September 20 Consumer-Grade Side-Scan Sonar Imagery of Invasive Silver Carp in a Missouri River Oxbow Lake, Creve Coeur Lake, 2023 September 20
In September 2023, the USGS demonstrated the use of side-scan sonar to image large densities of invasive carp in Creve Coeur Lake, Maryland Heights, Missouri, USA. A 400-meter reach was surveyed using a Humminbird Helix sonar system. Proprietary sonar data were converted to PNG image files (i.e., rectified and speed-corrected) using SonarTRX Pro. The resulting data set includes one CSV...
Fish target lengths of Silver Carp derived from Adaptive Resolution Imaging Sonar in backwater embayments of Kentucky Lake and Lake Barkley, Kentucky, 2022 February 18–23 Fish target lengths of Silver Carp derived from Adaptive Resolution Imaging Sonar in backwater embayments of Kentucky Lake and Lake Barkley, Kentucky, 2022 February 18–23
This dataset represents fish targets (presumed Silver Carp, Hypophthalmichthys molitrix) recorded using Adaptive Resolution Imaging Sonar (ARIS; Sound Metrics, Bellevue, WA) in five backwater embayments of Kentucky Lake and Lake Barkley, KY (2022 February). A surface-to-bottom block net was set across embayments in a “chevron” shape pointed upstream to guide fish movements downstream...
Consumer-grade sonar applications for silver carp in overwintering habitats of the Lower Mississippi River, 2023 January 31 Consumer-grade sonar applications for silver carp in overwintering habitats of the Lower Mississippi River, 2023 January 31
In January 2023, the USGS demonstrated the use of side-scan sonar and down-imaging sonar to locate and quantify fish including invasive carp. A dike pool in the study area was surveyed (254-meter reach) using a Humminbird Helix sonar system. Sonar surveys included concurrent recordings of side-scan and down-imaging sonar. Proprietary sonar data were converted to PNG image files (i.e...
Buffalo and Silver Carp individual and survival data following surgery using the sedation methods at Columbia Environmental Research Center, Columbia, Missouri, USA from 2022 to 2023 Buffalo and Silver Carp individual and survival data following surgery using the sedation methods at Columbia Environmental Research Center, Columbia, Missouri, USA from 2022 to 2023
The dataset includes capture and individual data for silver carp and buffalo from 2022 and 2023. Fish were captured in the Missouri River and tributaries and transported to the Columbia Environmental Research Center, Columbia, MO, USA. Fish were assigned to one of four treatments to examine different sedation techniques for surgical implantation of artificial transmitters: tricaine
Telemetry evaluation of invasive carp herding in Jonathan Creek Embayment, Kentucky Lake, Kentucky Telemetry evaluation of invasive carp herding in Jonathan Creek Embayment, Kentucky Lake, Kentucky
Data tables represents a telemetry study assessing the efficacy of sound and electricity used to herd Silver Carp (Hypophthalmichthys molitrix). The study occurred in Jonathan Creek Embayment of Kentucky Lake, Kentucky using 10 telemetered Silver Carp and 46 passive acoustic receivers. Two herding boats traveled at 2.22 meters per second along bank-to-bank transects through the study...
Starved Rock navigation lock fish clearing hydroacoustic data, Illinois River (2020) Starved Rock navigation lock fish clearing hydroacoustic data, Illinois River (2020)
These datasets (e.g., 'Starved Rock fish clearing_multi-beam imaging sonar fish data_Pre-clearing_Sonar-s1.csv') include exported information (e.g., fish detection counts) from processed fixed-location multi-beam imaging sonar and mobile side-scan sonar data. Fish abundance in the navigation lock was determined using mobile side-scan surveys, while multi-beam imaging sonars were used to...
Invasive carp movement rates among five herding techniques using adaptive resolution imaging sonar on the Lower Perche Creek, Columbia, MO Invasive carp movement rates among five herding techniques using adaptive resolution imaging sonar on the Lower Perche Creek, Columbia, MO
Data represent a comparison of herding techniques commonly used by natural resource agencies and the public to increase removal or harvest of invasive carp (i.e., Silver Carp) from U.S. waterways. Sites on lower Perche Creek, Columbia, MO (2018 August 9th to 2018 October 26th) were contained using block nets and treated with one of five herding techniques: (1) method commonly used by...
Semi-automated and manual enumeration of bigheaded carps from recreational-grade side-scan sonar imagery, Perche Creek, MO, 2018 Semi-automated and manual enumeration of bigheaded carps from recreational-grade side-scan sonar imagery, Perche Creek, MO, 2018
The dataset consists of count data derived from a series of sonar images. The data are fish counts per image from 1) a computerized process to extract fish counts, and 2) three manual assessors. Each image has a total of four associated fish counts.
Science and Products
Identifying overwintering habitat of silver and bighead carp in the lower Mississippi River: Implications for harvesting and population reduction Identifying overwintering habitat of silver and bighead carp in the lower Mississippi River: Implications for harvesting and population reduction
A total of 41 sites along a 58 mi reach of the Lower Mississippi River (LMR) were surveyed during winter 2022 for invasive carp aggregation.* Sites consisting of scallops closest to the dike-vegetated bank interface with deeper, slow-moving water and consistent access back to the main channel were preferred. Carp avoided strong currents, and there was no trend in depth selection other...
Authors
K. Jack Killgore, David Ruppel, Faucheux. Nick, W. Todd Slack, Amanda J.M. Oliver, Josey Lee Ridgway, Jesse Robert Fischer, Robin D. Calfee
Long-term surgery survival, body condition effects, and incision healing of Silver Carp and buffalo species comparing sedation methods across seasons Long-term surgery survival, body condition effects, and incision healing of Silver Carp and buffalo species comparing sedation methods across seasons
Objective Internal tagging for telemetry studies requires invasive surgery procedures, necessitating sufficient sedation to support animal welfare. Challenges with existing chemical sedatives have resulted in technological alternatives, including electrosedation, with these newer methods less extensively studied. Our primary objective was to understand long-term survival, body-condition...
Authors
Matthew Ross Acre, Sophia Marie Bonjour, Jacob N. Griffin, Robert Bratcher, Tyler Hessler, Dustin Broaddus, Andrew T. Mueller, Jacob Faulkner, Josey Lee Ridgway, Michael G. Iacchetta, Suzanne Colyer, Robin D. Calfee
Side-scan sonar as a tool for measuring fish populations: Current state of the science and future directions Side-scan sonar as a tool for measuring fish populations: Current state of the science and future directions
Side-scan sonar (SSS) is a powerful tool that can be used to address many key questions in fisheries science. In principle, SSS uses dual transducers to transmit a narrow-beam, wide-angle acoustic signal as the survey vessel transits an area. The intensity of reflected sound is recorded to generate an image mosaic comprised of benthic substrates and targets in the water column, including...
Authors
Josey Lee Ridgway, John A. Madsen, Jesse Robert Fischer, Robin D. Calfee, Matthew Ross Acre, David C. Kazyak
Silver carp herding: A telemetry evaluation of efficacy and implications for design and application Silver carp herding: A telemetry evaluation of efficacy and implications for design and application
Removal of invasive Silver Carp Hypophthalmichthys molitrix is a primary control action in North America. Strong avoidance responses to underwater sound and electricity have been shown to facilitate herding and mass removal of these fish. We conducted a telemetry study on a closed population of Silver Carp (i.e., 10 telemetered fish) to assess fine-scale movement responses to herding...
Authors
Josey Lee Ridgway, Matthew Ross Acre, Tyler Michael Hessler, Dustin Broaddus, Jessica Morris, Robin D. Calfee
Application of electricity and underwater acoustics to clear fish from a navigation lock during maintenance Application of electricity and underwater acoustics to clear fish from a navigation lock during maintenance
The presence of fish within navigation locks can introduce an environmental challenge for construction crews when maintenance is required. This study examined the effectiveness of a dual-deterrent fish herding technique using electricity and acoustic stimuli to reduce the abundance of fish within a navigation lock before a scheduled dewatering for maintenance. Fixed-location multi-beam...
Authors
Jose Rivera, Aaron R. Cupp, Josey Lee Ridgway, Duane Chapman, Bethany E Hoster, Matthew Ross Acre, Robin D. Calfee, Jesse Robert Fischer, James J. Duncker
An assessment of fish herding techniques: Management implications for mass removal and control of silver carp An assessment of fish herding techniques: Management implications for mass removal and control of silver carp
We assessed the effectiveness of herding techniques on adult Silver Carp Hypophthalmichthys molitrix in a tributary to the Missouri River. Sites (600 m) were contained using block nets and treated with one of five herding techniques: (1) a method commonly used by commercial fishers in the United States (commercial technique), (2) pulsed-DC electrofishing (electric technique), (3)...
Authors
Josey Lee Ridgway, Katelyn M. Lawson, Stephen August Shier, Robin D. Calfee, Duane Chapman
Semiautomated process for enumeration of fishes from recreational-grade side-scan sonar imagery Semiautomated process for enumeration of fishes from recreational-grade side-scan sonar imagery
The use of hydroacoustic techniques is increasing as scientists search for less invasive ways to monitor fish populations, and using recreational side‐scan sonar (SSS) imagery for monitoring has become more common in aquatic resource management over the last 15 years due in part to its low cost and user‐friendly interface. The time‐consuming nature of manually counting fish targets has...
Authors
Katelyn M Lawson, Josey Lee Ridgway, Andrew T. Mueller, Jacob Faulkner, Robin D. Calfee
Riverscape correlates for distribution of threatened spotfin chub Erimonax monachus in the Tennessee River Basin, USA Riverscape correlates for distribution of threatened spotfin chub Erimonax monachus in the Tennessee River Basin, USA
Globally, aquatic biodiversity is imperiled at an increasing rate, especially in diversity hotspots such as the southeastern USA. The spotfin chub Erimonax monachus is a federally threatened minnow with a disjunct distribution resulting from numerous impoundments on the Tennessee River and its tributaries in the heart of the southeastern USA. Recovery actions required to remove federal...
Authors
Joshuah S. Perkin, W. Keith Gibbs, Josey Lee Ridgway, S. Bradford Cook
Non-USGS Publications**
Ridgway, J.L., and Bettoli, P.W., 2017, Distribution, Age Structure, and Growth of Bigheaded Carps in the Lower Tennessee and Cumberland Rivers: Southeastern Naturalist, v. 16, no. 3, p. 426-442, 417.
Ridgway*, J.L., Goeckler, J.M., Morris, J., and Hammen, J.J., 2020, Diel Influences on Silver Carp Catch Rates Using an Electrified Paupier in Lentic Habitats: North American Journal of Fisheries Management.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Use and Evaluation of Stimuli for Herding Bigheaded Carps to Increase their Capture Efficiency
Mass removal of the invasive silver carp Hypophthalmichthys molitrix and bighead carp Hypophthalmichthys nobilis (collectively referred to as bigheaded carp) is a primary management action in the United States to contain population growth and reduce upstream dispersal. Efficient capture and removal techniques are required to achieve this goal, and the USGS is working to develop and evaluate such...
Invasive carp environmental DNA data from the Blackwater and Lamine rivers, Missouri, 2015 Invasive carp environmental DNA data from the Blackwater and Lamine rivers, Missouri, 2015
Data describe environmental DNA (eDNA) concentrations from invasive silver and bigheaded carp (Hypophthalmichthys spp.) in Missouri’s Blackwater and Lamine Rivers in 2015. Two, 3-day sampling trips were conducted in March and September 2015 (winter and summer samples, respectively) to collect water samples and associated water quality data. Parameters include locations of collected water...
Consumer-Grade Side-Scan Sonar Imagery of Invasive Silver Carp in a Missouri River Oxbow Lake, Creve Coeur Lake, 2023 September 20 Consumer-Grade Side-Scan Sonar Imagery of Invasive Silver Carp in a Missouri River Oxbow Lake, Creve Coeur Lake, 2023 September 20
In September 2023, the USGS demonstrated the use of side-scan sonar to image large densities of invasive carp in Creve Coeur Lake, Maryland Heights, Missouri, USA. A 400-meter reach was surveyed using a Humminbird Helix sonar system. Proprietary sonar data were converted to PNG image files (i.e., rectified and speed-corrected) using SonarTRX Pro. The resulting data set includes one CSV...
Fish target lengths of Silver Carp derived from Adaptive Resolution Imaging Sonar in backwater embayments of Kentucky Lake and Lake Barkley, Kentucky, 2022 February 18–23 Fish target lengths of Silver Carp derived from Adaptive Resolution Imaging Sonar in backwater embayments of Kentucky Lake and Lake Barkley, Kentucky, 2022 February 18–23
This dataset represents fish targets (presumed Silver Carp, Hypophthalmichthys molitrix) recorded using Adaptive Resolution Imaging Sonar (ARIS; Sound Metrics, Bellevue, WA) in five backwater embayments of Kentucky Lake and Lake Barkley, KY (2022 February). A surface-to-bottom block net was set across embayments in a “chevron” shape pointed upstream to guide fish movements downstream...
Consumer-grade sonar applications for silver carp in overwintering habitats of the Lower Mississippi River, 2023 January 31 Consumer-grade sonar applications for silver carp in overwintering habitats of the Lower Mississippi River, 2023 January 31
In January 2023, the USGS demonstrated the use of side-scan sonar and down-imaging sonar to locate and quantify fish including invasive carp. A dike pool in the study area was surveyed (254-meter reach) using a Humminbird Helix sonar system. Sonar surveys included concurrent recordings of side-scan and down-imaging sonar. Proprietary sonar data were converted to PNG image files (i.e...
Buffalo and Silver Carp individual and survival data following surgery using the sedation methods at Columbia Environmental Research Center, Columbia, Missouri, USA from 2022 to 2023 Buffalo and Silver Carp individual and survival data following surgery using the sedation methods at Columbia Environmental Research Center, Columbia, Missouri, USA from 2022 to 2023
The dataset includes capture and individual data for silver carp and buffalo from 2022 and 2023. Fish were captured in the Missouri River and tributaries and transported to the Columbia Environmental Research Center, Columbia, MO, USA. Fish were assigned to one of four treatments to examine different sedation techniques for surgical implantation of artificial transmitters: tricaine
Telemetry evaluation of invasive carp herding in Jonathan Creek Embayment, Kentucky Lake, Kentucky Telemetry evaluation of invasive carp herding in Jonathan Creek Embayment, Kentucky Lake, Kentucky
Data tables represents a telemetry study assessing the efficacy of sound and electricity used to herd Silver Carp (Hypophthalmichthys molitrix). The study occurred in Jonathan Creek Embayment of Kentucky Lake, Kentucky using 10 telemetered Silver Carp and 46 passive acoustic receivers. Two herding boats traveled at 2.22 meters per second along bank-to-bank transects through the study...
Starved Rock navigation lock fish clearing hydroacoustic data, Illinois River (2020) Starved Rock navigation lock fish clearing hydroacoustic data, Illinois River (2020)
These datasets (e.g., 'Starved Rock fish clearing_multi-beam imaging sonar fish data_Pre-clearing_Sonar-s1.csv') include exported information (e.g., fish detection counts) from processed fixed-location multi-beam imaging sonar and mobile side-scan sonar data. Fish abundance in the navigation lock was determined using mobile side-scan surveys, while multi-beam imaging sonars were used to...
Invasive carp movement rates among five herding techniques using adaptive resolution imaging sonar on the Lower Perche Creek, Columbia, MO Invasive carp movement rates among five herding techniques using adaptive resolution imaging sonar on the Lower Perche Creek, Columbia, MO
Data represent a comparison of herding techniques commonly used by natural resource agencies and the public to increase removal or harvest of invasive carp (i.e., Silver Carp) from U.S. waterways. Sites on lower Perche Creek, Columbia, MO (2018 August 9th to 2018 October 26th) were contained using block nets and treated with one of five herding techniques: (1) method commonly used by...
Semi-automated and manual enumeration of bigheaded carps from recreational-grade side-scan sonar imagery, Perche Creek, MO, 2018 Semi-automated and manual enumeration of bigheaded carps from recreational-grade side-scan sonar imagery, Perche Creek, MO, 2018
The dataset consists of count data derived from a series of sonar images. The data are fish counts per image from 1) a computerized process to extract fish counts, and 2) three manual assessors. Each image has a total of four associated fish counts.