Publications
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Experimental whole-lake dissolved organic carbon increase alters fish diet and density but not growth or productivity
Negative relationships between dissolved organic carbon (DOC) concentration and fish productivity have been reported from correlative studies across lakes, but to date there have not been experimental tests of these relationships. We increased the DOC concentration in a lake by 3.4 mg L-1, using a before-after control-impact (BACI) design, to quantify the effects on the productivity and population
Authors
Shuntaro Koizumi, Nicola Craig, Jacob A. Zwart, Patrick T. Kelly, Jacob P. Ziegler, Brian C. Weidel, Stuart E. Jones, Christopher T. Solomon
Distributions of PCB congeners and homologues in white sucker and coho salmon from Lake Michigan
We tested the hypothesis of the proportion of higher chlorinated biphenyl (PCB) congeners increasing with increasing trophic level by comparing the respective PCB homologue distributions in an omnivore, white sucker (Catostomus commersoni), and a top predator, coho salmon (Oncorhynchus kisutch), from Lake Michigan. Adult females had the same congener and homologue proportions of total PCB concentr
Authors
Martin A. Stapanian, Charles P. Madenjian, Stuart A. Batterman, Sergei M. Chernyak, William H. Edwards, Peter B. McIntyre
Evaluation of acoustic telemetry grids for determining aquatic animal movement and survival
Acoustic telemetry studies have frequently prioritized linear configurations of hydrophone receivers, such as perpendicular from shorelines or across rivers, to detect the presence of tagged aquatic animals. This approach introduces unknown bias when receivers are stationed for convenience at geographic bottlenecks (e.g., at the mouth of an embayment or between islands) as opposed to deployments f
Authors
Richard T. Kraus, Christopher Holbrook, Christopher Vandergoot, Taylor R. Stewart, Matthew D. Faust, Douglas A. Watkinson, Colin Charles, Mark Pegg, Eva C. Enders, Charles C. Krueger
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 KoÄŤovskĂ˝, David M. Warner
Fungal disease prevention in seedlings of rice (Oryza sativa) and other grasses by growth-promoting seed-associated endophytic bacteria from invasive Phragmites australis
Non-cultivated plants carry microbial endophytes that may be used to enhance development and disease resistance of crop species where growth-promoting and protective microbes may have been lost. During seedling establishment, seedlings may be infected by several fungal pathogens that are seed or soil borne. Several species of Fusarium, Pythium and other water moulds cause seed rots during germinat
Authors
Satish Kumar Verma, Kathryn L. Kingsley, Marshall S. Bergen, Kurt P. Kowalski, James F. White
Long-term assessment of ichthyoplankton in a large North American river system reveals changes in fish community dynamics
Larval fishes are sensitive to abiotic conditions and provide a direct measure of spawning success. The St. Clair – Detroit River System, a Laurentian Great Lakes connecting channel with a history of environmental degradation, has undergone improvements in habitat and water quality since the 1970s. We compared 2006–2015 ichthyoplankton community data with those collected prior to remediation effor
Authors
Taaja R. Tucker, Edward F. Roseman, Robin L. DeBruyne, Jeremy J. Pritt, David Bennion, Darryl W. Hondorp, James C. Boase
Does behavioural thermoregulation underlie seasonal movements in Lake Erie walleye?
Thermoregulation is presumed to be a widespread determinant of behaviour in fishes, but has not often been investigated as a mechanism shaping long-distance migrations. We used acoustic telemetry and animal-borne thermal loggers to test the hypothesis that seasonal migration in adult walleye (Sander vitreus) in Lake Erie is size- and (or) sex-specific and related to behavioural thermoregulation. F
Authors
Graham D. Raby, Christopher Vandergoot, Todd A. Hayden, Matthew D. Faust, Richard T. Kraus, John M. Dettmers, Steven J. Cooke, Yingming Zhao, Aaron T. Fisk, Charles C. Krueger
Associations between cyanobacteria and indices of secondary production in the western basin of Lake Erie
Large lakes provide a variety of ecological services to surrounding cities and communities. Many of these services are supported by ecological processes that are threatened by the increasing prevalence of cyanobacterial blooms which occur as aquatic ecosystems experience cultural eutrophication. Over the past 10 yr, Lake Erie experienced cyanobacterial blooms of increasing severity and frequency,
Authors
James H. Larson, Mary Anne Evans, Robert J. Kennedy, Sean Bailey, Keith A. Loftin, Zachary Laughrey, Robin Femmer, Jeff Schaeffer, William B. Richardson, Timothy Wynne, J. C. Nelson, Joseph W. Duris
Bottom trawl assessment of Lake Ontario prey fishes
Managing Lake Ontario fisheries in an ecosystem-context requires prey fish community and population data. Since 1978, multiple annual bottom trawl surveys have quantified prey fish dynamics to inform management relative to published Fish Community Objectives. In 2017, two whole-lake surveys collected 341 bottom trawls (spring: 204, fall: 137), at depths from 8-225m, and captured 751,350 fish from
Authors
Brian C. Weidel, Michael J. Connerton, Jeremy Holden
Surrounding land cover types as predictors of palustrine wetland vegetation quality in conterminous USA
The loss of wetland habitats and their often-unique biological communities is a major environmental concern. We examined vegetation data obtained from 380 wetlands sampled in a statistical survey of wetlands in the USA. Our goal was to identify which surrounding land cover types best predict two indices of vegetation quality in wetlands at the regional scale. We considered palustrine wetlands in f
Authors
Martin A. Stapanian, Brian Gara, William Schumacher
Evidence of repeated long-distance movements by lake charr Salvelinus namaycush in Lake Huron
Movements and dispersal distances of acoustically-tagged adult lake charr Salvelinus namaycush were estimated based on detections at acoustic receivers in Lake Huron during 2010–2014. Most lake charr were detected only at receivers proximate to their release location or were not detected at all, but 3–9% of tagged lake charr were detected at receivers located over 100 km from their release locatio
Authors
Stephen Riley, Tom Binder, Taaja R. Tucker, Charles C. Krueger
Seasonal trophic variation of yellow perch exceeds spatial variation in a large lake basin
Trophic structuring of complex food webs may vary at multiple spatial and temporal scales, both in terms of direct trophic connections and underlying energy pathways that support production. In large freshwater systems, the prey and primary producers that support individual higher-order consumers may vary across seasons and habitats due to differences in food availability, predator consumption pat
Authors
Allison R. Hrycik, Paris D. Collingsworth, Mark W. Rogers, Samuel C. Guffey, Tomas O. Hook