Patrick M Kocovsky
I am the Aquatic Invasive Species Program Manager within the Biological Threats and Invasive Species Research Program in the Ecosystems Mission Area.
I administer the USGS’ national research program on Aquatic Invasive Species. Our research foci include risk assessment, early detection and rapid response, and developing and evaluating deterrents and control methods for aquatic invasive species.
Education and Certifications
BS in Fishery Biology, magna cum laude, Colorado State, 1993
MS in Wildlife and Fisheries Science, Penn State, 1999
PhD in Wildlife and Fisheries Science, Penn State, 2004
Post-doc with USGS Northern Appalachian Research Lab on suitability of Susquehanna River tributaries for restoration of anadromous alosines and catadromous American Eel.
Science and Products
Filter Total Items: 13
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Filter Total Items: 56
Ethical guidelines for publication of fisheries research
In 2000, the Governing Board of the American Fisheries Society (AFS) approved the first Guidelines for Authorship (GFA) in AFS publications, developed by the AFS Publications Overview Committee (POC) chaired by Mary Fabrizio. This version of the GFA document provided guidance for fisheries science publications for nearly two decades. The 2015 AFS President Donna Parish charged the POC to revise th
Authors
Patrick Kočovský, Patricia S Gaunt, Brandon K. Peoples, Emmanuel A Frimpong
Optimum electrofishing waveforms and parameters to induce a capture-prone response in juvenile Grass Carp
Grass Carp (Ctenopharyngodon idella) are a non-native species to North America that were first introduced for vegetation control in the 1960s. However, wild-reproducing Grass Carp can negatively impact aquatic habitats and aquatic communities by consuming substantial amounts of aquatic vegetation and increasing turbidity. Numerous fisheries techniques have been used in an attempt to control or e
Authors
Andrew S Briggs, Jan C. Dean, James C. Boase, Patrick Kočovský, James A. Luoma
Fisheries research and monitoring activities of the Lake Erie Biological Station, 2017
This report presents biomass-based summaries of fish communities in western Lake Erie derived from USGS bottom trawl surveys from 2013 to 2017 during June and September. The survey design provided temporal and spatial coverage that does not exist in the interagency trawl database, and thus complemented the August Ohio-Ontario effort to reinforce stock assessments with more robust data. Analyses he
Authors
Kevin R. Keretz, Patrick Kočovský, Richard T. Kraus, Christopher Vandergoot
A spatially discrete, integral projection model and its application to invasive carp
Natural resource managers and ecologists often desire an understanding of spatial dynamics such as migration, dispersion, and meta-population dynamics. Network-node models can capture these salient features. Additionally, the state-variable used with many species may be appropriately modeled as a continuous variable (e.g., length) and management activities sometimes can only target individuals of
Authors
Richard A. Erickson, Eric E. Eager, Patrick Kočovský, David C. Glover, Jahn L. Kallis, K. R. Long
What it is to be established: policy and management implications for non-native and invasive species
Management of invasive species, whether prevention, population reduction, or eradication, requires assessment of the invasive species’ population status and an assessment of the probability of success of management options. Perceptions of a species’ permanence in an environment or lack thereof frequently drives how limited time, financial, and personnel resources are allocated to such efforts. Lan
Authors
Patrick Kočovský, Rochelle Sturtevant, James Schardt
“Asian carp” is societally and scientifically problematic. Let's replace it
Bighead Carp Hypophthalmichthys nobilis, Black Carp Mylopharyngodon piceus, Grass Carp Ctenopharyngodon idella, and Silver Carp H. molitrix are considered invasive species in North America and Europe. In North America, they are typically referred to collectively as “Asian carp”, a reference to their native range. The category “Asian carp” fails to acknowledge the cultural value and the ecological
Authors
Patrick Kočovský, Duane Chapman, Song S. Qian
Modeling framework to estimate spawning and hatching locations of pelagically-spawned eggs
Identifying spawning and hatching locations is vital to controlling invasive fish and conserving imperiled fish, which can be difficult for pelagically-spawning species with semi-buoyant eggs. In freshwater systems, this reproductive strategy is common among cyprinid species, such as Chinese carp species currently threatening the Great Lakes. Following the confirmation that one of these species, G
Authors
Holly S. Embke, Patrick Kočovský, Tatiana Garcia, Christine M. Mayer, Song S. Qian
Diets of endangered silver chub (Macrhybopsis storeriana, Kirtland, 1844) in Lake Erie and implications for recovery
Silver chub (Macrhybopsis storeriana, Kirtland, 1844) is a native Cyprinid in Lake Erie, one of the Laurentian Great Lakes of North America. It is listed as endangered by the US state of New York and Canada, which has a recovery plan, and as special concern by the state of Michigan. Silver chub faces a potential threat to recovery from control efforts for invasive Grass carp (Ctenopharyngodon idel
Authors
Patrick Kočovský
Fish community responses to submerged aquatic vegetation in Maumee Bay, Western Lake Erie
Submerged aquatic vegetation (SAV) in clearwater systems simultaneously provides habitat for invertebrate prey and acts as refugia for small fishes. Many fishes in Lake Erie rely on shallow, heavily vegetated bays as spawning grounds and the loss or absence of which is known to reduce recruitment in other systems. The Maumee River and Maumee Bay, which once had abundant macrophyte beds, have exper
Authors
Jacob Miller, Patrick Kočovský, Daniel Wiegmann, Jeffery G. Miner
Inferred fish behavior its implications for hydroacoustic surveys in nearshore habitats
Population availability and vessel avoidance effects on hydroacoustic abundance estimates may be scale dependent; therefore, it is important to evaluate these biases across systems. We performed an inter-ship comparison survey to determine the effect of vessel size, day-night period, depth, and environmental gradients on walleye (Sander vitreus) density estimates in Lake Erie, an intermediate-scal
Authors
Mark R. DuFour, Christine M. Mayer, Song S. Qian, Christopher Vandergoot, Richard T. Kraus, Patrick Kočovský, David M. Warner
Water guns affect abundance and behavior of bigheaded carp and native fish differently
Water guns have shown the potential to repel nuisance aquatic organisms. This study examines the effects of exposure to a 1966.4 cm3 seismic water gun array (two guns) on the abundance and behavior of Bighead Carp Hypophthalmichthys nobilis, Silver Carp H. molitrix (collectively referred to as bigheaded carp) and native fishes (e.g., Smallmouth Buffalo Ictiobus bubalus). Water guns were deployed i
Authors
Jose Rivera, David C. Glover, Patrick Kočovský, James E. Garvey, Mark P. Gaikowski, Nathan R. Jensen, Ryan F. Adams
Evaluating factors driving population densities of mayfly nymphs in Western Lake Erie
Mayfly (Hexagenia spp.) nymphs have been widely used as indicators of water and substrate quality in lakes. Thermal stratification and the subsequent formation of benthic hypoxia may result in nymph mortality. Our goal was to identify potential associations between recent increases in temperature and eutrophication, which exacerbate hypoxic events in lakes, and mayfly populations in Lake Erie. Nym
Authors
Martin A. Stapanian, Patrick Kočovský, Betsy L. Bodamer Scarbro
Science and Products
Filter Total Items: 13
No Result Found
Filter Total Items: 56
Ethical guidelines for publication of fisheries research
In 2000, the Governing Board of the American Fisheries Society (AFS) approved the first Guidelines for Authorship (GFA) in AFS publications, developed by the AFS Publications Overview Committee (POC) chaired by Mary Fabrizio. This version of the GFA document provided guidance for fisheries science publications for nearly two decades. The 2015 AFS President Donna Parish charged the POC to revise th
Authors
Patrick Kočovský, Patricia S Gaunt, Brandon K. Peoples, Emmanuel A Frimpong
Optimum electrofishing waveforms and parameters to induce a capture-prone response in juvenile Grass Carp
Grass Carp (Ctenopharyngodon idella) are a non-native species to North America that were first introduced for vegetation control in the 1960s. However, wild-reproducing Grass Carp can negatively impact aquatic habitats and aquatic communities by consuming substantial amounts of aquatic vegetation and increasing turbidity. Numerous fisheries techniques have been used in an attempt to control or e
Authors
Andrew S Briggs, Jan C. Dean, James C. Boase, Patrick Kočovský, James A. Luoma
Fisheries research and monitoring activities of the Lake Erie Biological Station, 2017
This report presents biomass-based summaries of fish communities in western Lake Erie derived from USGS bottom trawl surveys from 2013 to 2017 during June and September. The survey design provided temporal and spatial coverage that does not exist in the interagency trawl database, and thus complemented the August Ohio-Ontario effort to reinforce stock assessments with more robust data. Analyses he
Authors
Kevin R. Keretz, Patrick Kočovský, Richard T. Kraus, Christopher Vandergoot
A spatially discrete, integral projection model and its application to invasive carp
Natural resource managers and ecologists often desire an understanding of spatial dynamics such as migration, dispersion, and meta-population dynamics. Network-node models can capture these salient features. Additionally, the state-variable used with many species may be appropriately modeled as a continuous variable (e.g., length) and management activities sometimes can only target individuals of
Authors
Richard A. Erickson, Eric E. Eager, Patrick Kočovský, David C. Glover, Jahn L. Kallis, K. R. Long
What it is to be established: policy and management implications for non-native and invasive species
Management of invasive species, whether prevention, population reduction, or eradication, requires assessment of the invasive species’ population status and an assessment of the probability of success of management options. Perceptions of a species’ permanence in an environment or lack thereof frequently drives how limited time, financial, and personnel resources are allocated to such efforts. Lan
Authors
Patrick Kočovský, Rochelle Sturtevant, James Schardt
“Asian carp” is societally and scientifically problematic. Let's replace it
Bighead Carp Hypophthalmichthys nobilis, Black Carp Mylopharyngodon piceus, Grass Carp Ctenopharyngodon idella, and Silver Carp H. molitrix are considered invasive species in North America and Europe. In North America, they are typically referred to collectively as “Asian carp”, a reference to their native range. The category “Asian carp” fails to acknowledge the cultural value and the ecological
Authors
Patrick Kočovský, Duane Chapman, Song S. Qian
Modeling framework to estimate spawning and hatching locations of pelagically-spawned eggs
Identifying spawning and hatching locations is vital to controlling invasive fish and conserving imperiled fish, which can be difficult for pelagically-spawning species with semi-buoyant eggs. In freshwater systems, this reproductive strategy is common among cyprinid species, such as Chinese carp species currently threatening the Great Lakes. Following the confirmation that one of these species, G
Authors
Holly S. Embke, Patrick Kočovský, Tatiana Garcia, Christine M. Mayer, Song S. Qian
Diets of endangered silver chub (Macrhybopsis storeriana, Kirtland, 1844) in Lake Erie and implications for recovery
Silver chub (Macrhybopsis storeriana, Kirtland, 1844) is a native Cyprinid in Lake Erie, one of the Laurentian Great Lakes of North America. It is listed as endangered by the US state of New York and Canada, which has a recovery plan, and as special concern by the state of Michigan. Silver chub faces a potential threat to recovery from control efforts for invasive Grass carp (Ctenopharyngodon idel
Authors
Patrick Kočovský
Fish community responses to submerged aquatic vegetation in Maumee Bay, Western Lake Erie
Submerged aquatic vegetation (SAV) in clearwater systems simultaneously provides habitat for invertebrate prey and acts as refugia for small fishes. Many fishes in Lake Erie rely on shallow, heavily vegetated bays as spawning grounds and the loss or absence of which is known to reduce recruitment in other systems. The Maumee River and Maumee Bay, which once had abundant macrophyte beds, have exper
Authors
Jacob Miller, Patrick Kočovský, Daniel Wiegmann, Jeffery G. Miner
Inferred fish behavior its implications for hydroacoustic surveys in nearshore habitats
Population availability and vessel avoidance effects on hydroacoustic abundance estimates may be scale dependent; therefore, it is important to evaluate these biases across systems. We performed an inter-ship comparison survey to determine the effect of vessel size, day-night period, depth, and environmental gradients on walleye (Sander vitreus) density estimates in Lake Erie, an intermediate-scal
Authors
Mark R. DuFour, Christine M. Mayer, Song S. Qian, Christopher Vandergoot, Richard T. Kraus, Patrick Kočovský, David M. Warner
Water guns affect abundance and behavior of bigheaded carp and native fish differently
Water guns have shown the potential to repel nuisance aquatic organisms. This study examines the effects of exposure to a 1966.4 cm3 seismic water gun array (two guns) on the abundance and behavior of Bighead Carp Hypophthalmichthys nobilis, Silver Carp H. molitrix (collectively referred to as bigheaded carp) and native fishes (e.g., Smallmouth Buffalo Ictiobus bubalus). Water guns were deployed i
Authors
Jose Rivera, David C. Glover, Patrick Kočovský, James E. Garvey, Mark P. Gaikowski, Nathan R. Jensen, Ryan F. Adams
Evaluating factors driving population densities of mayfly nymphs in Western Lake Erie
Mayfly (Hexagenia spp.) nymphs have been widely used as indicators of water and substrate quality in lakes. Thermal stratification and the subsequent formation of benthic hypoxia may result in nymph mortality. Our goal was to identify potential associations between recent increases in temperature and eutrophication, which exacerbate hypoxic events in lakes, and mayfly populations in Lake Erie. Nym
Authors
Martin A. Stapanian, Patrick Kočovský, Betsy L. Bodamer Scarbro