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Suresh Andrew Sethi, PhD (Former Employee)

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Staff on frozen Thunder Bay, Lake Superior, collecting egg samples

Aquatic Native Species and Habitat Restoration: Cisco Spawning Habitat Assessment

Cisco (formerly known as Lake Herring) Coregonus artedi are native shallow water coregonines which were formerly very abundant in the Great Lakes and provided large commercial fisheries and healthy prey to native piscivores. In most areas outside of Lake Superior, cisco abundance is greatly reduced and in Lakes Ontario and Erie they are uncommon to rare.
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Aquatic Native Species and Habitat Restoration: Cisco Spawning Habitat Assessment

Cisco (formerly known as Lake Herring) Coregonus artedi are native shallow water coregonines which were formerly very abundant in the Great Lakes and provided large commercial fisheries and healthy prey to native piscivores. In most areas outside of Lake Superior, cisco abundance is greatly reduced and in Lakes Ontario and Erie they are uncommon to rare.
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Elodea spp. on a rake in Sand Lake in Anchorage, Alaska

Effect of Elodea spp. on Fish Performance Mediated Through Food Web Interactions

The potential for invasive species introductions in Arctic and Subarctic ecosystems is growing as climate change manifests and human activity increases in high latitudes.
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Biological Threats and Invasive Species Research Program, Species Management Research Program, Alaska Science Center
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Effect of Elodea spp. on Fish Performance Mediated Through Food Web Interactions

The potential for invasive species introductions in Arctic and Subarctic ecosystems is growing as climate change manifests and human activity increases in high latitudes.
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Hydroacoustic data from uncrewed surface vehicle (USV) overtakes in Lake Superior, 2022

These data were derived from hydroacoustic data collected by uncrewed surface vehicles (USVs) and powered research vessels in Lake Superior in 2022. The powered vessels overtook the USVs to study fish avoidance of survey vessels during traditional acoustic surveys. The water column was divided into four depth groups for analysis. Each USV transect was binned into 30-sec intervals and...
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Great Lakes Science Center

Hydroacoustic data from uncrewed surface vehicle (USV) overtakes in Lakes Huron and Michigan, 2021

These data were derived from hydroacoustic data collected by uncrewed surface vehicles (USVs) and powered research vessels. The powered vessels overtook the USVs in Lakes Huron and Michigan to study fish avoidance of survey vessels during traditional acoustic surveys. The water column was divided into three depth groups (epilimnion, metalimnion, hypolimnion) for analysis. Each drone...
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Great Lakes Science Center

Survival and ancillary data associated with Cisco acoustic tagging experiment conducted in 2018 and 2019

These data include survival information for Cisco in the laboratory for up to 30 days after surgical implantation of two different sizes of Lotek acoustic tags. Three-hundred fish of a range of sizes were used for the implantation and controls of this experiment, which was repeated three time. Ancillary data of surgical condition, recovery, and time until death or tag expulsion were also...
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Great Lakes Science Center
Filter Total Items: 46

Reconstructing half a century of coregonine recruitment reveals species-specific dynamics and synchrony across the Laurentian Great Lakes

Understanding how multiple species and populations vary in their recruitment dynamics can elucidate the processes driving recruitment across space and time. Lake Whitefish (Coregonus clupeaformis) and Cisco (C. artedi) are socioecologically important fishes across their range; however, many Laurentian Great Lakes populations have experienced declining, poor, or sporadic recruitment in...
Authors
Taylor A. Brown, Lars G. Rudstam, Suresh Andrew Sethi, Paul Ripple, Jason B. Smith, Theodore J. Treska, Christopher Hessell, Erik Olsen, Ji X. He, Jory L. Jonas, Benjamin J. Rook, Joshua Blankenheim, Sarah J.H. Beech, Erin Brown, Eric K. Berglund, H. E. Cook, Erin S. Dunlop, Stephen James, Steven A. Pothoven, Zach Amidon, John A. Sweka, Dray D. Carl, Scott P. Hansen, David Bunnell, Brian Weidel, Andrew Edgar Honsey
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Ecosystems Mission Area, Great Lakes Science Center

Synthesizing professional opinion of Lake Whitefish and Cisco recruitment drivers across the Great Lakes

Disentangling the suite of ecological drivers that explain recruitment variability for Lake Whitefish Coregonus clupeaformis and Cisco C. artedi is of critical importance for their conservation, management, and stewardship in the Laurentian Great Lakes. However, recruitment is inherently variable and can be regulated by many interacting processes, the relative importance of which can...
Authors
Taylor A. Brown, Lars G. Rudstam, Suresh Andrew Sethi, Christopher Hessell, Erik Olsen, Jory L. Jonas, Benjamin J. Rook, Steven A. Pothoven, Sarah J.H. Beech, Erin S. Dunlop, Stephen James, Jason B. Smith, Zach Amidon, Dray D. Carl, David Bunnell, Ralph W. Tingley, Brian Weidel, Andrew Edgar Honsey
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Ecosystems Mission Area, Great Lakes Science Center

Multistage time-to-event models improve survival inference by partitioning mortality processes of tracked organisms

Advances in tagging technologies are expanding opportunities to estimate survival of fish and wildlife populations. Yet, capture and handling effects could impact survival outcomes and bias inference about natural mortality processes. We developed a multistage time-to-event model that can partition the survival process into sequential phases that reflect the tagged animal experience...
Authors
Suresh Andrew Sethi, Alexander Koeberle, Anna J. Poulton, Daniel W. Linden, Duane R. Diefenbach, Frances E. Buderman, Mary Jo Casalena, Kenneth Duren
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Cooperative Research Units

Prey ration, temperature, and predator species influence digestion rates of prey DNA inferred from qPCR and metabarcoding

Diet analysis is a vital tool for understanding trophic interactions and is frequently used to inform conservation and management. Molecular approaches can identify diet items that are impossible to distinguish using more traditional visual-based methods. Yet, our understanding of how different variables, such as predator species or prey ration size, influence molecular diet analysis is...
Authors
Cory Dick, Wesley Larson, Kirby Karpan, Diana S. Baetscher, Yue Shi, Suresh Andrew Sethi, Nann A. Fangue, Mark J. Henderson
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Cooperative Research Units

Larval cisco and lake whitefish exhibit high distributional overlap within nursery areas

Coregonine fishes, including lake whitefish (Coregonus clupeaformis) and cisco (C. artedi), are socioecologically important in the Laurentian Great Lakes and of conservation concern, but the processes driving recruitment variability are unclear. In Lake Ontario, cisco and lake whitefish exhibit similar spawning behaviours and early life histories, but population trajectories are...
Authors
Taylor A. Brown, Lars G. Rudstam, Jeremy P. Holden, Brian Weidel, Amanda Susanne Ackiss, Ann J. Ropp, Marc Chalupnicki, James Duncan Mckenna, Suresh Andrew Sethi
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Ecosystems Mission Area, Great Lakes Science Center

Parentage-based tagging using mothers balances accuracy and cost for discriminating between natural and stocked recruitment for inland fisheries

Hatchery programmes are frequently used to supplement inland fisheries, yet achieving successful management outcomes often requires information on stocked versus naturally reproduced fish abundance. Parentage-based tagging – genetically assigning offspring to their parents – has potential to be an effective approach for distinguishing stocked and naturally reproduced fish. However...
Authors
Kimberly B. Fitzpatrick, Nina Overgaard Therkildsen, Benjamin Marcy-Quay, Harmony B. Borchardt-Wier, Suresh Andrew Sethi
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Cooperative Research Units

Elodea mediates juvenile salmon growth by altering physical structure in freshwater habitats

Invasive species introductions in high latitudes are accelerating and elevating the need to address questions of their effects on Subarctic and Arctic ecosystems. As a driver of ecosystem function, submerged aquatic vegetation is one of the most deleterious biological invasions to aquatic food webs. The aquatic plant Elodea spp. has potential to be a widespread invader to Arctic and...
Authors
Michael P. Carey, Gordon H. Reeves, Suresh Andrew Sethi, Theresa L. Tanner, Daniel B. Young, Krista K. Bartz, Christian E. Zimmerman
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Ecosystems Mission Area, Alaska Science Center

Diversity in spawning habitat use among Great Lakes Cisco populations

Cisco (Coregonus artedi) once dominated fish communities in the Laurentian Great Lakes. Restoring the abundance and distribution of this species has emerged as a management priority, yet our understanding of Cisco spawning habitat use is insufficient to characterise habitat needs for these populations and assess whether availability of suitable spawning habitat could be a constraint to...
Authors
Matthew R. Paufve, Suresh Andrew Sethi, Brian Weidel, Brian F. Lantry, Daniel Yule, Lars G. Rudstam, Jory L. Jonas, Eric K. Berglund, Michael Connerton, Dimitry Gorsky, Matthew E. Herbert, Jason B. Smith
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Ecosystems Mission Area, Cooperative Research Units, Great Lakes Science Center

Estimating Pacific walrus abundance and survival with multievent mark-recapture models

Arctic marine ecosystems are undergoing rapid physical and biological change associated with climate warming and loss of sea ice. Sea ice loss will impact many species through altered spatial and temporal availability of resources. In the Bering and Chukchi Seas, the Pacific walrus Odobenus rosmarus divergens is one species that could be impacted by rapid environmental change, and thus...
Authors
William S. Beatty, Patrick R. Lemons, Jason P. Everett, Cara J. Lewis, Rebecca L. Taylor, Robert J. Lynn, Suresh Andrew Sethi, Lori T. Quakenbush, John J. Citta, Michelle L. Kissling, Natalia Kryukova, John K. Wennburg
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Ecosystems Mission Area, Cooperative Research Units, Alaska Science Center, Upper Midwest Environmental Sciences Center

Juvenile salmon habitat use drives variation in growth and highlights vulnerability to river fragmentation

Widespread stream network fragmentation from dams and culverts has altered habitat connectivity in river ecosystems and presents an acute threat to migratory fish. To support watershed management for an iconic migratory fish group, we assessed juvenile salmon growth outcomes across habitat use strategies and characterized how these life histories may be impacted by stream connectivity...
Authors
Suresh Andrew Sethi, Michael P. Carey, Jonathon Gerken, Bradley P. Harris, Nathan Wolf, Curry Cunningham, Felipe Restrepo, Josh Ashline
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Cooperative Research Units

Biodiversity underpins fisheries resilience to exploitation in the Amazon River basin.

Inland fisheries feed greater than 150 million people globally, yet their status is rarely assessed due to their socio-ecological complexity and pervasive lack of data. Here, we leverage an unprecedented landings time series from the Amazon, Earth's largest river basin, together with theoretical food web models to examine (i) taxonomic and trait-based signatures of exploitation in inland...
Authors
Sebastian A. Heilpern, Suresh Andrew Sethi, Ronaldo B. Barthem, Vandick da Silva Batista, Carolina R.C. Doria, Fabrice Duponchelle, Aurea Garcia Vasquez, Michael Goulding, Victoria Isaac, Shahid Naeem, Alexander S. Flecker
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Cooperative Research Units

Round Goby captured in a North American estuary: Status and implications in the Hudson River, New York

Round Goby Neogobius melanostomus, a nonnative fish species to North America, has been rapidly expanding through the connected waterways of the Laurentian Great Lakes. Herein, we document the eastward and southern expansion of Round Goby into the Hudson River, New York, an iconic coastal estuary that drains to Long Island Sound and the Atlantic seaboard. In summer and early fall 2021...
Authors
Richard Pendleton, Russell Berdan, Scott George, Gregg Kenney, Suresh Andrew Sethi
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Cooperative Research Units

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