Richard T Kraus, PhD
My current position is with the Great Lakes Science Center, at Lake Erie Biological Station in Huron, OH. In addition to my role as a Research Fishery Biologist at the center, I am also the station supervisor and responsible for managing station personnel and activities on our large research vessel, the R/V Muskie, which is dedicated to research on Lake Erie.
My research is primarily aimed at understanding the consequences of migration and habitat use to population dynamics, species interactions, and resource management. I apply a wide range of methods to inform management decisions on the conservation and rehabilitation of native species. My work typically involves interagency collaboration with US state and federal agencies, Canadian provincial and federal partners, and academics, as defined by legislative mandates (e.g., Great Lakes Fishery Research Authorization Act) and Memoranda of Understanding with the Great Lakes Council of Lake Committees. We work together on key issues to advance our understanding of interjurisdictional fishes with complex life cycles for the benefit of stakeholders and the public.
Professional Experience
Supervisory Research Fishery Biologist, Lake Erie Biological Station, 2010 to present.
Assistant Professor, George Mason University, 2006 to 2010
Assistant Research Scientist, Texas A&M University at Galveston, 2006
Postdoctoral Research Fellow, Texas A&M University at Galveston, 2003 to 2006
Education and Certifications
Ph.D. Marine Estuarine and Environmental Sciences, University of Maryland, 2003
M.S. Marine Science, College of William and Mary, 1998
B.S. Marine Biology cum laude, College of Charleston, 1994
Affiliations and Memberships*
American Institute of Fishery Research Biologists
American Fisheries Society
International Association of Great Lakes Researchers
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Do intracoelomic telemetry transmitters alter the post-release behaviour of migratory fish?
Electronic tags have become a common tool in fish research, enhancing our understanding of how fish interact with their environment and move among different habitats, for estimating mortality and recording internal physiological states. An often-untested assumption of electronic tagging studies is that tagged fish are representative of untagged conspecifics and thus show ‘normal’ behaviour (e.g. m
Authors
Alexander D.M. Wilson, Todd A. Hayden, Christopher S. Vandergoot, Richard T. Kraus, John M. Dettmers, Steven J. Cooke, Charles C. Krueger
Fisheries research and monitoring activities of the Lake Erie Biological Station, 2015
In 2015, the U.S. Geological Survey’s (USGS) Lake Erie Biological Station (LEBS) 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 Fish Community Assessment as well as contributing to the cooperative multi-agency Central Basin Hydroacoustics Assessme
Authors
Betsy L. Bodamer Scarbro, W.H. Edwards, Patrick M. Kocovsky, Richard T. Kraus, M. R. Rogers, A. L. Schoonyan, T. R. Stewart
Testing the thermal-niche oxygen-squeeze hypothesis for estuarine striped bass
In many stratified coastal ecosystems, conceptual and bioenergetics models predict seasonal reduction in quality and quantity of fish habitat due to high temperatures and hypoxia. We tested these predictions using acoustic telemetry of 2 to 4 kg striped bass (Morone saxatilis Walbaum) and high-resolution spatial water quality sampling in the Patuxent River, a sub-estuary of the Chesapeake Bay, dur
Authors
Richard T. Kraus, D.H. Secor, Rebecca L. Wingate
Dynamic hypoxic zones in Lake Erie compress fish habitat, altering vulnerability to fishing gears
Seasonal degradation of aquatic habitats from hypoxia occurs in numerous freshwater and coastal marine systems and can result in direct mortality or displacement of fish. Yet, fishery landings from these systems are frequently unresponsive to changes in the severity and extent of hypoxia, and population-scale effects have been difficult to measure except in extreme hypoxic conditions with hypoxia-
Authors
Richard T. Kraus, Carey T. Knight, Troy M. Farmer, Ann Marie Gorman, Paris D. Collingsworth, Glenn J. Warren, Patrick M. Kocovsky, Joseph D. Conroy
Fisheries research and monitoring activities of the Lake Erie Biological Station, 2014
In 2014, the USGS LEBS 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, the Eastern Basin Coldwater Community Assessment, and LTL
Authors
Betsy L. Bodamer Scarbro, William Edwards, Carrie Gawne, Patrick M. Kocovsky, Richard T. Kraus, Mark W. Rogers, Taylor Stewart
Ecology and population status of trout-perch (Percopsis omiscomaycus) in western Lake Erie
Trout-perch Percopsis omiscomaycus is among the most abundant benthic species in Lake Erie, but comparatively little is known about its ecology. Although others have conducted extensive studies on trout-perch ecology, those efforts predated invasions of white perch Morone americana, Dreissena spp., Bythotrephes longimanus and round goby Neogobius melanostomus, suggesting the need to revisit past w
Authors
Patrick Kočovský, Andrea T. Stoneman, Richard T. Kraus
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 the Easter
Authors
Richard T. Kraus, Mark W. Rogers, Patrick Kočovský, William Edwards, Betsy L. Bodamer Scarbro, Kevin R. Keretz, Stephanie A. Berkman
Habitat heterogeneity and intraguild interactions modify distribution and injury rates in two coexisting genera of damselflies
1. Sublethal effects of predation can affect both population and community structure. Despite this, little is known about how the frequency of injury varies in relation to habitat, aquatic community characteristics or between trophically similar, coexisting taxa.
2. In a tidal freshwater ecosystem, we first examined injuries (lamellar autotomy) of Enallagma and Ischnura damselfly larvae, which h
Authors
Jonathan W. Witt, Rebecca E. Forkner, Richard T. Kraus
Fisheries research and monitoring activities of the Lake Erie Biological Station, 2012
No abstract available.
Authors
Richard T. Kraus, Mark Rogers, Patrick M. Kocovsky, William Edwards, Betsy L. Bodamer Scarbro, Kevin R. Keretz, R. Wirick
Horizontal movements of Atlantic blue marlin (Makaira nigricans) in the Gulf of Mexico
We examined movements of Atlantic blue marlin (Makaira nigricans) from the Gulf of Mexico based upon 42 pop-up archival transmitting (PAT) tags. Long deployments (including one 334-day track) revealed diverse movement patterns within the Gulf of Mexico. North–south seasonal changes in blue marlin distribution showed strong correspondence with established seasonal patterns of sea surface temperatur
Authors
Richard T. Kraus, R.J.D. Wells, J.R. Rooker
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Filter Total Items: 34Do intracoelomic telemetry transmitters alter the post-release behaviour of migratory fish?
Electronic tags have become a common tool in fish research, enhancing our understanding of how fish interact with their environment and move among different habitats, for estimating mortality and recording internal physiological states. An often-untested assumption of electronic tagging studies is that tagged fish are representative of untagged conspecifics and thus show ‘normal’ behaviour (e.g. mAuthorsAlexander D.M. Wilson, Todd A. Hayden, Christopher S. Vandergoot, Richard T. Kraus, John M. Dettmers, Steven J. Cooke, Charles C. KruegerFisheries research and monitoring activities of the Lake Erie Biological Station, 2015
In 2015, the U.S. Geological Survey’s (USGS) Lake Erie Biological Station (LEBS) 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 Fish Community Assessment as well as contributing to the cooperative multi-agency Central Basin Hydroacoustics AssessmeAuthorsBetsy L. Bodamer Scarbro, W.H. Edwards, Patrick M. Kocovsky, Richard T. Kraus, M. R. Rogers, A. L. Schoonyan, T. R. StewartTesting the thermal-niche oxygen-squeeze hypothesis for estuarine striped bass
In many stratified coastal ecosystems, conceptual and bioenergetics models predict seasonal reduction in quality and quantity of fish habitat due to high temperatures and hypoxia. We tested these predictions using acoustic telemetry of 2 to 4 kg striped bass (Morone saxatilis Walbaum) and high-resolution spatial water quality sampling in the Patuxent River, a sub-estuary of the Chesapeake Bay, durAuthorsRichard T. Kraus, D.H. Secor, Rebecca L. WingateDynamic hypoxic zones in Lake Erie compress fish habitat, altering vulnerability to fishing gears
Seasonal degradation of aquatic habitats from hypoxia occurs in numerous freshwater and coastal marine systems and can result in direct mortality or displacement of fish. Yet, fishery landings from these systems are frequently unresponsive to changes in the severity and extent of hypoxia, and population-scale effects have been difficult to measure except in extreme hypoxic conditions with hypoxia-AuthorsRichard T. Kraus, Carey T. Knight, Troy M. Farmer, Ann Marie Gorman, Paris D. Collingsworth, Glenn J. Warren, Patrick M. Kocovsky, Joseph D. ConroyFisheries research and monitoring activities of the Lake Erie Biological Station, 2014
In 2014, the USGS LEBS 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, the Eastern Basin Coldwater Community Assessment, and LTLAuthorsBetsy L. Bodamer Scarbro, William Edwards, Carrie Gawne, Patrick M. Kocovsky, Richard T. Kraus, Mark W. Rogers, Taylor StewartEcology and population status of trout-perch (Percopsis omiscomaycus) in western Lake Erie
Trout-perch Percopsis omiscomaycus is among the most abundant benthic species in Lake Erie, but comparatively little is known about its ecology. Although others have conducted extensive studies on trout-perch ecology, those efforts predated invasions of white perch Morone americana, Dreissena spp., Bythotrephes longimanus and round goby Neogobius melanostomus, suggesting the need to revisit past wAuthorsPatrick Kočovský, Andrea T. Stoneman, Richard T. KrausFisheries 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 the EasterAuthorsRichard T. Kraus, Mark W. Rogers, Patrick Kočovský, William Edwards, Betsy L. Bodamer Scarbro, Kevin R. Keretz, Stephanie A. BerkmanHabitat heterogeneity and intraguild interactions modify distribution and injury rates in two coexisting genera of damselflies
1. Sublethal effects of predation can affect both population and community structure. Despite this, little is known about how the frequency of injury varies in relation to habitat, aquatic community characteristics or between trophically similar, coexisting taxa. 2. In a tidal freshwater ecosystem, we first examined injuries (lamellar autotomy) of Enallagma and Ischnura damselfly larvae, which hAuthorsJonathan W. Witt, Rebecca E. Forkner, Richard T. KrausFisheries research and monitoring activities of the Lake Erie Biological Station, 2012
No abstract available.AuthorsRichard T. Kraus, Mark Rogers, Patrick M. Kocovsky, William Edwards, Betsy L. Bodamer Scarbro, Kevin R. Keretz, R. WirickHorizontal movements of Atlantic blue marlin (Makaira nigricans) in the Gulf of Mexico
We examined movements of Atlantic blue marlin (Makaira nigricans) from the Gulf of Mexico based upon 42 pop-up archival transmitting (PAT) tags. Long deployments (including one 334-day track) revealed diverse movement patterns within the Gulf of Mexico. North–south seasonal changes in blue marlin distribution showed strong correspondence with established seasonal patterns of sea surface temperaturAuthorsRichard T. Kraus, R.J.D. Wells, J.R. Rooker - News
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*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government