Skip to main content
U.S. flag

An official website of the United States government

Kevin R Keretz

Kevin Keretz is a Biological Science Technician based in Huron, OH. 

Science and Products

Data releases by this scientist

Filter Total Items: 14

Lake Erie Fish Community Data, 2013-2024 Lake Erie Fish Community Data, 2013-2024

Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based fishery management and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management, the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western...
By
Great Lakes Science Center

Lake Erie Fish Community Data, 2013-2023 Lake Erie Fish Community Data, 2013-2023

Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based fishery management and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management, the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western...
By
Great Lakes Science Center

Temperature and Depth Data from Walleye Archival Data Logging Tags in Lake Erie, 2021 to 2022 Temperature and Depth Data from Walleye Archival Data Logging Tags in Lake Erie, 2021 to 2022

This data release contains passive detection of acoustic telemetry tags that were implanted in walleye Sander vitreus to investigate habitat selection in the dimensions of depth and temperature, and seasonal cross-lake migration in Lake Erie. The data also include continuous archive records of temperature and depth that were obtained from tags that were surrendered by fishers who...
By
Great Lakes Science Center

Lake Erie Fish Community Data, 2013-2022 Lake Erie Fish Community Data, 2013-2022

Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based fishery management, and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western...
By
Great Lakes Science Center

Hydroacoustic data from central Lake Erie, 2021 Hydroacoustic data from central Lake Erie, 2021

Hydroacoustic estimates of fish density are used for fisheries management in central Lake Erie. Hydroacoustic data were collected along 10, randomly-selected, 5-kilometer transects and two cross-basin transects between the US and Canadian shorelines in central Lake Erie during July 2021. Software-generated raw variables were used for calculating estimates of hydroacoustic fish densities...
By
Great Lakes Science Center

Lake Erie Fish Community Data, 2013-2021 Lake Erie Fish Community Data, 2013-2021

Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based fishery management, and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western...
By
Great Lakes Science Center

Temperature and Depth Data from Walleye Archival Data Logging Tags in Lake Erie, 2014 Temperature and Depth Data from Walleye Archival Data Logging Tags in Lake Erie, 2014

While recording fish habitat use via electronic sensors, biologgers can also be viewed as autonomous environmental monitoring systems with the organism as a vehicle. This dual perspective has provided novel results from marine ecosystems but has not been applied to freshwater ecosystems. To understand limitations in freshwater, we evaluated miniature depth and temperature recorders, as...
By
Great Lakes Science Center

Zebra and Quagga Mussel Dry Weight Information; Lake Erie 2014 Zebra and Quagga Mussel Dry Weight Information; Lake Erie 2014

Impacts of dreissenid mussels (Dreissena spp.) on Great Lakes ecosystems are well documented, and a better understanding of mechanisms that cause variation in mussel abundance is needed. An outstanding question is how much mussel biomass is consumed by fish predation. A significant difficulty for investigating mussel consumption by fish is that mussels in stomachs are often a mix of...
By
Great Lakes Science Center

Lake Erie Fish Community Data, 2013-2019 Lake Erie Fish Community Data, 2013-2019

Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based fishery management, and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western...
By
Great Lakes Science Center

Lake Erie Fish Community Data, 2013-2020 Lake Erie Fish Community Data, 2013-2020

Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based fishery management, and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western...
By
Great Lakes Science Center

Diet Data from the Western Basin of Lake Erie Examining White and Yellow Perch, 2012-2016 Diet Data from the Western Basin of Lake Erie Examining White and Yellow Perch, 2012-2016

A fish's diet is the integrated response of multiple ecological interactions including habitat use, foraging behavior, prey community characteristics, and inter-specific interactions. Fish diet samples have quantified how the invasion of white perch into Lake Erie in the early 1950s has influenced interactions with native yellow perch, which are similar in morphology and habitat use...
By
Great Lakes Science Center

Lake Erie Fish Community Data, 2013-2018 Lake Erie Fish Community Data, 2013-2018

Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based based fishery management, and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management the objectives of this survey were to: provide estimates of densities of key forage and predator species in the...
By
Great Lakes Science Center
A researcher looks back at Cleveland as the vessel finishes deploying a new trawl net.
Research Vessel Muskie near Cleveland
Research Vessel Muskie near Cleveland
A researcher looks back at Cleveland as the vessel finishes deploying a new trawl net.

Research Vessel Muskie near Cleveland

Research Vessel Muskie near Cleveland

Crew of the USGS Great Lakes Science Center R/V Muskie (Huron, Ohio) testing bottom trawl equipment in Lake Erie off the coast of Cleveland, Ohio, in preparation for the upcoming field season.  Photo credit: Kevin Keretz, USGS

By
Great Lakes Science Center
A researcher looks back at Cleveland as the vessel finishes deploying a new trawl net.

Research Vessel Muskie near Cleveland

Research Vessel Muskie near Cleveland

Crew of the USGS Great Lakes Science Center R/V Muskie (Huron, Ohio) testing bottom trawl equipment in Lake Erie off the coast of Cleveland, Ohio, in preparation for the upcoming field season.  Photo credit: Kevin Keretz, USGS

By
Great Lakes Science Center
A lake sturgeon sits on a measuring board aboard a research vessel in Lake Erie
Surprise Catch
Surprise Catch
A lake sturgeon sits on a measuring board aboard a research vessel in Lake Erie

Surprise Catch

Surprise Catch

A juvenile lake sturgeon (Acipenser fulvescens) captured during a bottom trawl survey in Lake Erie aboard the GLSC’s R/V Muskie. Photo credit: Kevin Keretz, USGS.

By
Great Lakes Science Center
A lake sturgeon sits on a measuring board aboard a research vessel in Lake Erie

Surprise Catch

Surprise Catch

A juvenile lake sturgeon (Acipenser fulvescens) captured during a bottom trawl survey in Lake Erie aboard the GLSC’s R/V Muskie. Photo credit: Kevin Keretz, USGS.

By
Great Lakes Science Center
Crewman on the stern of a vessel on the lake watching a large trawl net being pulled in by a winch, calm seas
Down the Pipe
Down the Pipe
Crewman on the stern of a vessel on the lake watching a large trawl net being pulled in by a winch, calm seas

Down the Pipe

Down the Pipe

A bottom trawl being deployed by USGS biological science technicians (GLSC; Huron, Ohio) aboard the GLSC’s R/V Muskie. Photo credit: Kevin Keretz, USGS.

By
Great Lakes Science Center
Crewman on the stern of a vessel on the lake watching a large trawl net being pulled in by a winch, calm seas

Down the Pipe

Down the Pipe

A bottom trawl being deployed by USGS biological science technicians (GLSC; Huron, Ohio) aboard the GLSC’s R/V Muskie. Photo credit: Kevin Keretz, USGS.

By
Great Lakes Science Center
Two researchers stand in front of a tub full of fish on a research vessel on the water
Lake Erie Gold
Lake Erie Gold
Two researchers stand in front of a tub full of fish on a research vessel on the water

Lake Erie Gold

Lake Erie Gold

The USGS research crew (GLSC; Huron, OH) aboard the R/V Muskie celebrate a large catch of adult yellow perch (Perca flavescens) to be tagged with acoustic transmitters and then released back into Lake Erie for tracking. Photo credit: Kevin Keretz, USGS.

By
Great Lakes Science Center
Two researchers stand in front of a tub full of fish on a research vessel on the water

Lake Erie Gold

Lake Erie Gold

The USGS research crew (GLSC; Huron, OH) aboard the R/V Muskie celebrate a large catch of adult yellow perch (Perca flavescens) to be tagged with acoustic transmitters and then released back into Lake Erie for tracking. Photo credit: Kevin Keretz, USGS.

By
Great Lakes Science Center

Publications by this scientist

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2024 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2024

A comprehensive understanding of fish populations and their interactions is the cornerstone of modern fishery management and the basis for Lake Erie’s Fish Community Objectives (FCOs) developed in 2020 (Francis et al. 2020). The 2024 U.S. Geological Survey (USGS) Lake Erie Biological Station Annual Report is responsive to these FCOs and the USGS obligations via a Memorandum of...
Authors
Mark Dufour, Francesco Guzzo, Corbin Hilling, Kevin Keretz, Richard Kraus, Richard Oldham, James Roberts, Joseph Schmitt
By
Ecosystems Mission Area, Great Lakes Science Center

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2023 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2023

This report presents biomass-based summaries of fish communities in western Lake Erie derived from USGS bottom trawl surveys conducted from 2013 to 2023. Analyses herein evaluated trends in total biomass, abundance of dominant predator and forage species, non-native species composition, biodiversity and community structure. Data from this effort can be explored interactively online and...
Authors
Mark Dufour, Francesco Guzzo, Corbin Hilling, Kevin Keretz, Richard Kraus, Richard Oldham, James Roberts, Joseph Schmitt
By
Ecosystems Mission Area, Great Lakes Science Center

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2022 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2022

This report presents biomass-based summaries of fish communities in western Lake Erie derived from USGS bottom trawl surveys conducted from 2013 to 2022 in June and September. The survey design compliments the August ODNR- OMNDMNRF effort by reinforcing stock assessments with more robust data. Analyses herein evaluated trends in total biomass, abundance of dominant predator and forage...
Authors
Mark Dufour, Corbin Hilling, Kevin Keretz, Richard Kraus, Richard Oldham, James Roberts, Joseph Schmitt
By
Ecosystems Mission Area, Great Lakes Science Center

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2020 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2020

This report presents biomass-based summaries of fish communities in the West Basin of Lake Erie derived from USGS bottom trawl surveys conducted from 2013 to 2020 during June and September. The survey design provided temporal and spatial coverage that did not exist in the interagency trawl database, and thus complemented the August ODNR-OMNRF effort to reinforce stock assessments with...
Authors
Kevin Keretz, Patrick Kocovsky, Richard Kraus, James Roberts, Joseph Schmitt
By
Ecosystems Mission Area, Great Lakes Science Center

Improved methods for understanding the role of predation on dreissenid population dynamics Improved methods for understanding the role of predation on dreissenid population dynamics

Impacts of dreissenid mussels (Dreissena spp.) on Great Lakes ecosystems are well documented, and a better understanding of mechanisms that cause variation in dreissenid abundance is needed. An outstanding question is how much dreissenid biomass is consumed by fish predation. A significant difficulty for investigating dreissenid consumption by fish is that dreissenids in stomachs are...
Authors
Kevin Keretz, Richard Kraus, Joseph Schmitt
By
Ecosystems Mission Area, Great Lakes Science Center

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2021 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2021

A comprehensive understanding of fish populations and their interactions is the cornerstone of modern fishery management and the basis for Lake Erie’s Fish Community Goals and Objectives (FCOs) developed in 2020 (Francis et al. 2020). The 2021 USGS Lake Erie Biological Station annual report is responsive to these FCOs and the U.S. Geological Survey (USGS) obligations via a Memorandum of
Authors
Mark Dufour, Corbin Hilling, Kevin Keretz, Richard Kraus, Richard Oldham, James Roberts, Joseph Schmitt
By
Ecosystems Mission Area, Great Lakes Science Center

Resource partitioning across a trophic gradient between a freshwater fish and an intraguild exotic Resource partitioning across a trophic gradient between a freshwater fish and an intraguild exotic

The introduction of exotic species has the potential to cause resource competition with native species and may lead to competitive exclusion when resources are limiting. On the other hand, information is lacking to predict under what alternate trophic conditions coexistence may occur. Comparing diets of native yellow perch Perca flavescens and nonindigenous white perch Morone americana...
Authors
Richard Kraus, Joseph Schmitt, Kevin Keretz
By
Ecosystems Mission Area, Great Lakes Science Center

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2019 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2019

A comprehensive understanding of fish populations and their interactions is the cornerstone of modern fishery management and the basis for Fish Community Goals and Objectives for Lake Erie (Ryan et al. 2003). This report is responsive to U.S. Geological Survey (USGS) obligations via Memorandum of Understanding (MOU) with the Great Lakes Council of Lake Committees (CLC) to provide...
Authors
Kevin Keretz, Patrick Kocovsky, Richard Kraus, Joseph Schmitt
By
Ecosystems Mission Area, Great Lakes Science Center

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2017 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...
Authors
Kevin Keretz, Patrick Kocovsky, Richard Kraus, Christopher Vandergoot
By
Ecosystems Mission Area, Great Lakes Science Center

Gradients in Catostomid assemblages along a reservoir cascade Gradients in Catostomid assemblages along a reservoir cascade

Serial impoundment of major rivers leads to alterations of natural flow dynamics and disrupts longitudinal connectivity. Catostomid fishes (suckers, family Catostomidae) are typically found in riverine or backwater habitats yet are able to persist in impounded river systems. To the detriment of conservation, there is limited information about distribution of catostomid fishes in...
Authors
Leandro Miranda, Kevin Keretz, Chelsea Gilliland
By
Cooperative Research Units

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2013 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2013

In 2013, the U.S. Geological Survey’s Lake Erie Biological Station successfully completed large vessel surveys in all three of Lake Erie’s basins. Lake Erie Biological Station’s primary vessel surveys included the Western Basin Forage Fish Assessment and East Harbor Forage Fish Assessment as well as contributing to the cooperative multi-agency Central Basin Hydroacoustics Assessment and...
Authors
Richard Kraus, Mark Rogers, Patrick Kocovsky, William Edwards, Betsy Bodamer Scarbro, Kevin Keretz, Stephanie Berkman
By
Ecosystems Mission Area, Great Lakes Science Center

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2012 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2012

No abstract available.
Authors
Richard Kraus, Mark Rogers, Patrick Kocovsky, William Edwards, Betsy Bodamer Scarbro, Kevin Keretz, R. Wirick
By
Ecosystems Mission Area, Great Lakes Science Center

News about this scientist

GLSC Contributes to American Fisheries Society Annual Meeting

GLSC Contributes to American Fisheries Society Annual Meeting

Annual American Fishery Society meeting presentations

Read Article
GLSC Works with NY State DEC to Release and Study Cisco in Lake Erie

GLSC Works with NY State DEC to Release and Study Cisco in Lake Erie

Tunison Lab works with NYDEC to release acoustically tagged cisco in Lake Erie.

Read Article

Science and Products

Data releases by this scientist

Filter Total Items: 14

Lake Erie Fish Community Data, 2013-2024 Lake Erie Fish Community Data, 2013-2024

Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based fishery management and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management, the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western...
By
Great Lakes Science Center

Lake Erie Fish Community Data, 2013-2023 Lake Erie Fish Community Data, 2013-2023

Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based fishery management and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management, the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western...
By
Great Lakes Science Center

Temperature and Depth Data from Walleye Archival Data Logging Tags in Lake Erie, 2021 to 2022 Temperature and Depth Data from Walleye Archival Data Logging Tags in Lake Erie, 2021 to 2022

This data release contains passive detection of acoustic telemetry tags that were implanted in walleye Sander vitreus to investigate habitat selection in the dimensions of depth and temperature, and seasonal cross-lake migration in Lake Erie. The data also include continuous archive records of temperature and depth that were obtained from tags that were surrendered by fishers who...
By
Great Lakes Science Center

Lake Erie Fish Community Data, 2013-2022 Lake Erie Fish Community Data, 2013-2022

Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based fishery management, and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western...
By
Great Lakes Science Center

Hydroacoustic data from central Lake Erie, 2021 Hydroacoustic data from central Lake Erie, 2021

Hydroacoustic estimates of fish density are used for fisheries management in central Lake Erie. Hydroacoustic data were collected along 10, randomly-selected, 5-kilometer transects and two cross-basin transects between the US and Canadian shorelines in central Lake Erie during July 2021. Software-generated raw variables were used for calculating estimates of hydroacoustic fish densities...
By
Great Lakes Science Center

Lake Erie Fish Community Data, 2013-2021 Lake Erie Fish Community Data, 2013-2021

Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based fishery management, and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western...
By
Great Lakes Science Center

Temperature and Depth Data from Walleye Archival Data Logging Tags in Lake Erie, 2014 Temperature and Depth Data from Walleye Archival Data Logging Tags in Lake Erie, 2014

While recording fish habitat use via electronic sensors, biologgers can also be viewed as autonomous environmental monitoring systems with the organism as a vehicle. This dual perspective has provided novel results from marine ecosystems but has not been applied to freshwater ecosystems. To understand limitations in freshwater, we evaluated miniature depth and temperature recorders, as...
By
Great Lakes Science Center

Zebra and Quagga Mussel Dry Weight Information; Lake Erie 2014 Zebra and Quagga Mussel Dry Weight Information; Lake Erie 2014

Impacts of dreissenid mussels (Dreissena spp.) on Great Lakes ecosystems are well documented, and a better understanding of mechanisms that cause variation in mussel abundance is needed. An outstanding question is how much mussel biomass is consumed by fish predation. A significant difficulty for investigating mussel consumption by fish is that mussels in stomachs are often a mix of...
By
Great Lakes Science Center

Lake Erie Fish Community Data, 2013-2019 Lake Erie Fish Community Data, 2013-2019

Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based fishery management, and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western...
By
Great Lakes Science Center

Lake Erie Fish Community Data, 2013-2020 Lake Erie Fish Community Data, 2013-2020

Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based fishery management, and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western...
By
Great Lakes Science Center

Diet Data from the Western Basin of Lake Erie Examining White and Yellow Perch, 2012-2016 Diet Data from the Western Basin of Lake Erie Examining White and Yellow Perch, 2012-2016

A fish's diet is the integrated response of multiple ecological interactions including habitat use, foraging behavior, prey community characteristics, and inter-specific interactions. Fish diet samples have quantified how the invasion of white perch into Lake Erie in the early 1950s has influenced interactions with native yellow perch, which are similar in morphology and habitat use...
By
Great Lakes Science Center

Lake Erie Fish Community Data, 2013-2018 Lake Erie Fish Community Data, 2013-2018

Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based based fishery management, and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management the objectives of this survey were to: provide estimates of densities of key forage and predator species in the...
By
Great Lakes Science Center
A researcher looks back at Cleveland as the vessel finishes deploying a new trawl net.
Research Vessel Muskie near Cleveland
Research Vessel Muskie near Cleveland
A researcher looks back at Cleveland as the vessel finishes deploying a new trawl net.

Research Vessel Muskie near Cleveland

Research Vessel Muskie near Cleveland

Crew of the USGS Great Lakes Science Center R/V Muskie (Huron, Ohio) testing bottom trawl equipment in Lake Erie off the coast of Cleveland, Ohio, in preparation for the upcoming field season.  Photo credit: Kevin Keretz, USGS

By
Great Lakes Science Center
A researcher looks back at Cleveland as the vessel finishes deploying a new trawl net.

Research Vessel Muskie near Cleveland

Research Vessel Muskie near Cleveland

Crew of the USGS Great Lakes Science Center R/V Muskie (Huron, Ohio) testing bottom trawl equipment in Lake Erie off the coast of Cleveland, Ohio, in preparation for the upcoming field season.  Photo credit: Kevin Keretz, USGS

By
Great Lakes Science Center
A lake sturgeon sits on a measuring board aboard a research vessel in Lake Erie
Surprise Catch
Surprise Catch
A lake sturgeon sits on a measuring board aboard a research vessel in Lake Erie

Surprise Catch

Surprise Catch

A juvenile lake sturgeon (Acipenser fulvescens) captured during a bottom trawl survey in Lake Erie aboard the GLSC’s R/V Muskie. Photo credit: Kevin Keretz, USGS.

By
Great Lakes Science Center
A lake sturgeon sits on a measuring board aboard a research vessel in Lake Erie

Surprise Catch

Surprise Catch

A juvenile lake sturgeon (Acipenser fulvescens) captured during a bottom trawl survey in Lake Erie aboard the GLSC’s R/V Muskie. Photo credit: Kevin Keretz, USGS.

By
Great Lakes Science Center
Crewman on the stern of a vessel on the lake watching a large trawl net being pulled in by a winch, calm seas
Down the Pipe
Down the Pipe
Crewman on the stern of a vessel on the lake watching a large trawl net being pulled in by a winch, calm seas

Down the Pipe

Down the Pipe

A bottom trawl being deployed by USGS biological science technicians (GLSC; Huron, Ohio) aboard the GLSC’s R/V Muskie. Photo credit: Kevin Keretz, USGS.

By
Great Lakes Science Center
Crewman on the stern of a vessel on the lake watching a large trawl net being pulled in by a winch, calm seas

Down the Pipe

Down the Pipe

A bottom trawl being deployed by USGS biological science technicians (GLSC; Huron, Ohio) aboard the GLSC’s R/V Muskie. Photo credit: Kevin Keretz, USGS.

By
Great Lakes Science Center
Two researchers stand in front of a tub full of fish on a research vessel on the water
Lake Erie Gold
Lake Erie Gold
Two researchers stand in front of a tub full of fish on a research vessel on the water

Lake Erie Gold

Lake Erie Gold

The USGS research crew (GLSC; Huron, OH) aboard the R/V Muskie celebrate a large catch of adult yellow perch (Perca flavescens) to be tagged with acoustic transmitters and then released back into Lake Erie for tracking. Photo credit: Kevin Keretz, USGS.

By
Great Lakes Science Center
Two researchers stand in front of a tub full of fish on a research vessel on the water

Lake Erie Gold

Lake Erie Gold

The USGS research crew (GLSC; Huron, OH) aboard the R/V Muskie celebrate a large catch of adult yellow perch (Perca flavescens) to be tagged with acoustic transmitters and then released back into Lake Erie for tracking. Photo credit: Kevin Keretz, USGS.

By
Great Lakes Science Center

Publications by this scientist

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2024 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2024

A comprehensive understanding of fish populations and their interactions is the cornerstone of modern fishery management and the basis for Lake Erie’s Fish Community Objectives (FCOs) developed in 2020 (Francis et al. 2020). The 2024 U.S. Geological Survey (USGS) Lake Erie Biological Station Annual Report is responsive to these FCOs and the USGS obligations via a Memorandum of...
Authors
Mark Dufour, Francesco Guzzo, Corbin Hilling, Kevin Keretz, Richard Kraus, Richard Oldham, James Roberts, Joseph Schmitt
By
Ecosystems Mission Area, Great Lakes Science Center

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2023 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2023

This report presents biomass-based summaries of fish communities in western Lake Erie derived from USGS bottom trawl surveys conducted from 2013 to 2023. Analyses herein evaluated trends in total biomass, abundance of dominant predator and forage species, non-native species composition, biodiversity and community structure. Data from this effort can be explored interactively online and...
Authors
Mark Dufour, Francesco Guzzo, Corbin Hilling, Kevin Keretz, Richard Kraus, Richard Oldham, James Roberts, Joseph Schmitt
By
Ecosystems Mission Area, Great Lakes Science Center

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2022 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2022

This report presents biomass-based summaries of fish communities in western Lake Erie derived from USGS bottom trawl surveys conducted from 2013 to 2022 in June and September. The survey design compliments the August ODNR- OMNDMNRF effort by reinforcing stock assessments with more robust data. Analyses herein evaluated trends in total biomass, abundance of dominant predator and forage...
Authors
Mark Dufour, Corbin Hilling, Kevin Keretz, Richard Kraus, Richard Oldham, James Roberts, Joseph Schmitt
By
Ecosystems Mission Area, Great Lakes Science Center

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2020 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2020

This report presents biomass-based summaries of fish communities in the West Basin of Lake Erie derived from USGS bottom trawl surveys conducted from 2013 to 2020 during June and September. The survey design provided temporal and spatial coverage that did not exist in the interagency trawl database, and thus complemented the August ODNR-OMNRF effort to reinforce stock assessments with...
Authors
Kevin Keretz, Patrick Kocovsky, Richard Kraus, James Roberts, Joseph Schmitt
By
Ecosystems Mission Area, Great Lakes Science Center

Improved methods for understanding the role of predation on dreissenid population dynamics Improved methods for understanding the role of predation on dreissenid population dynamics

Impacts of dreissenid mussels (Dreissena spp.) on Great Lakes ecosystems are well documented, and a better understanding of mechanisms that cause variation in dreissenid abundance is needed. An outstanding question is how much dreissenid biomass is consumed by fish predation. A significant difficulty for investigating dreissenid consumption by fish is that dreissenids in stomachs are...
Authors
Kevin Keretz, Richard Kraus, Joseph Schmitt
By
Ecosystems Mission Area, Great Lakes Science Center

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2021 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2021

A comprehensive understanding of fish populations and their interactions is the cornerstone of modern fishery management and the basis for Lake Erie’s Fish Community Goals and Objectives (FCOs) developed in 2020 (Francis et al. 2020). The 2021 USGS Lake Erie Biological Station annual report is responsive to these FCOs and the U.S. Geological Survey (USGS) obligations via a Memorandum of
Authors
Mark Dufour, Corbin Hilling, Kevin Keretz, Richard Kraus, Richard Oldham, James Roberts, Joseph Schmitt
By
Ecosystems Mission Area, Great Lakes Science Center

Resource partitioning across a trophic gradient between a freshwater fish and an intraguild exotic Resource partitioning across a trophic gradient between a freshwater fish and an intraguild exotic

The introduction of exotic species has the potential to cause resource competition with native species and may lead to competitive exclusion when resources are limiting. On the other hand, information is lacking to predict under what alternate trophic conditions coexistence may occur. Comparing diets of native yellow perch Perca flavescens and nonindigenous white perch Morone americana...
Authors
Richard Kraus, Joseph Schmitt, Kevin Keretz
By
Ecosystems Mission Area, Great Lakes Science Center

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2019 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2019

A comprehensive understanding of fish populations and their interactions is the cornerstone of modern fishery management and the basis for Fish Community Goals and Objectives for Lake Erie (Ryan et al. 2003). This report is responsive to U.S. Geological Survey (USGS) obligations via Memorandum of Understanding (MOU) with the Great Lakes Council of Lake Committees (CLC) to provide...
Authors
Kevin Keretz, Patrick Kocovsky, Richard Kraus, Joseph Schmitt
By
Ecosystems Mission Area, Great Lakes Science Center

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2017 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...
Authors
Kevin Keretz, Patrick Kocovsky, Richard Kraus, Christopher Vandergoot
By
Ecosystems Mission Area, Great Lakes Science Center

Gradients in Catostomid assemblages along a reservoir cascade Gradients in Catostomid assemblages along a reservoir cascade

Serial impoundment of major rivers leads to alterations of natural flow dynamics and disrupts longitudinal connectivity. Catostomid fishes (suckers, family Catostomidae) are typically found in riverine or backwater habitats yet are able to persist in impounded river systems. To the detriment of conservation, there is limited information about distribution of catostomid fishes in...
Authors
Leandro Miranda, Kevin Keretz, Chelsea Gilliland
By
Cooperative Research Units

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2013 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2013

In 2013, the U.S. Geological Survey’s Lake Erie Biological Station successfully completed large vessel surveys in all three of Lake Erie’s basins. Lake Erie Biological Station’s primary vessel surveys included the Western Basin Forage Fish Assessment and East Harbor Forage Fish Assessment as well as contributing to the cooperative multi-agency Central Basin Hydroacoustics Assessment and...
Authors
Richard Kraus, Mark Rogers, Patrick Kocovsky, William Edwards, Betsy Bodamer Scarbro, Kevin Keretz, Stephanie Berkman
By
Ecosystems Mission Area, Great Lakes Science Center

Fisheries research and monitoring activities of the Lake Erie Biological Station, 2012 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2012

No abstract available.
Authors
Richard Kraus, Mark Rogers, Patrick Kocovsky, William Edwards, Betsy Bodamer Scarbro, Kevin Keretz, R. Wirick
By
Ecosystems Mission Area, Great Lakes Science Center

News about this scientist

GLSC Contributes to American Fisheries Society Annual Meeting

GLSC Contributes to American Fisheries Society Annual Meeting

Annual American Fishery Society meeting presentations

Read Article
GLSC Works with NY State DEC to Release and Study Cisco in Lake Erie

GLSC Works with NY State DEC to Release and Study Cisco in Lake Erie

Tunison Lab works with NYDEC to release acoustically tagged cisco in Lake Erie.

Read Article
Was this page helpful?