Publications
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Environmental Escherichia coli: Ecology and public health implications - A review
Escherichia coli is classified as a rod-shaped, Gram-negative bacterium in the family Enterobacteriaceae. The bacterium mainly inhabits the lower intestinal tract of warm-blooded animals, including humans, and is often discharged into the environment through feces or wastewater effluent. The presence of E. coli in environmental waters has long been considered as an indicator of recent fecal pollut
Authors
Jeonghwan Jang, Hor-Gil Hur, Michael J. Sadowsky, Muruleedhara Byappanahalli, Tao Yan, Satoshi Ishii
Simulation of rapid ecological change in Lake Ontario
Lower trophic level processes are integral to proper functioning of large aquatic ecosystems and have been disturbed in Lake Ontario by various stressors including exotic species. The invasion of benthic habitats by dreissenid mussels has led to systemic changes and native faunal declines. Size-dependent physiological rates, spatial differences and connectivity, competition, and differential popul
Authors
James E. McKenna, Marc Chalupnicki, Dawn E. Dittman, James M. Watkins
Movement patterns and spatial segregation of two populations of lake trout Salvelinus namaycush in Lake Huron
Movement ecology is an important component of life history and population dynamics, and consequently its understanding can inform successful fishery management decision-making. While lake trout populations in Lake Huron have shown signs of recovery from near extinction in recent years, knowledge of their movement behavior remains incomplete. We used acoustic telemetry to describe and compare movem
Authors
Thomas Binder, J. Ellen Marsden, Stephen Riley, James E. Johnson, Nicholas S. Johnson, Ji He, Mark P. Ebener, Christopher Holbrook, Roger A. Bergstedt, Charles R. Bronte, Todd A. Hayden, Charles C. Krueger
Test of a non-physical barrier consisting of light, sound, and bubble screen to block upstream movement of sea lamprey in an experimental raceway
Control of the invasive Sea Lamprey Petromyzon marinus is critical for management of commercial and recreational fisheries in the Laurentian Great Lakes. Use of physical barriers to block Sea Lampreys from spawning habitat is a major component of the control program. However, the resulting interruption of natural streamflow and blockage of nontarget species present substantial challenges. Developm
Authors
Scott M. Miehls, Nicholas S. Johnson, Pete J. Hrodey
Ecosystem services in the Great Lakes
A comprehensive inventory of ecosystem services across the entire Great Lakes basin is currently lacking and is needed to make informed management decisions. A greater appreciation and understanding of ecosystem services, including both use and non-use services, may have avoided misguided resource management decisions in the past that resulted in negative legacies inherited by future generations.
Authors
Alan D. Steinman, Bradley J. Cardinale, Wayne R. Munns, Mary E. Ogdahl, David J. Allan, Ted Angadi, Sarah Bartlett, Kate A. Brauman, Muruleedhara Byappanahalli, Matt Doss, Diane Dupont, Annie Johns, Donna Kashian, Frank Lupi, Peter B. McIntyre, Todd Miller, Michael P. Moore, Rebecca Logsdon Muenich, Rajendra Poudel, James Price, Bill Provencher, Anne Rea, Jennifer Read, Steven Renzetti, Brent Sohngen, Erica Washburn
Community stability within the St. Marys River fish community: Evidence from trawl surveys
A trawl survey was conducted in the Saint Marys River during 2010–2011 and we compared our results to a prior trawl survey conducted during 1979–1983 to look for long-term changes in the fish community, especially in terms of changes induced by invasive species. We found no substantive temporal differences in fish density, fish biomass, or fish diversity; lower trawl biomass during 2010–2011 was l
Authors
Jeffrey S. Schaeffer, Anjanette K. Bowen, David G. Fielder
2016 status of the Lake Ontario Lower Trophic levels
Significant Findings for Year 2016:
1) Offshore spring total phosphorus (TP) in 2016 was 6.2 μg/L, higher than 2014 and 2015 (4.0 and 4.2 μg/L); there was no significant decline 2001 - 2016. Offshore soluble reactive phosphorus (SRP) was very low in 2016; Apr/May – Oct mean values were
Authors
Kristen T. Holeck, Lars G. Rudstam, Christopher Hotaling, Russ McCullough, Dave Lemon, Web Pearsall, Jana Lantry, Mike Connerton, Steve LaPan, Zy Biesinger, Brian F. Lantry, Maureen Walsh, Brian C. Weidel
Field study suggests that sex determination in sea lamprey is directly influenced by larval growth rate
Sex determination mechanisms in fishes lie along a genetic-environmental continuum and thereby offer opportunities to understand how physiology and environment interact to determine sex. Mechanisms and ecological consequences of sex determination in fishes are primarily garnered from teleosts, with little investigation into basal fishes. We tagged and released larval sea lamprey (Petromyzon marinu
Authors
Nicholas S. Johnson, William D. Swink, Travis O. Brenden
Acoustic telemetry and fisheries management
This paper reviews the use of acoustic telemetry as a tool for addressing issues in fisheries management, and serves as the lead to the special Feature Issue of Ecological Applications titled “Acoustic Telemetry and Fisheries Management”. Specifically, we provide an overview of the ways in which acoustic telemetry can be used to inform issues central to the ecology, conservation, and management of
Authors
Glenn T. Crossin, Michelle R. Heupel, Christopher Holbrook, Nigel E. Hussey, Susan K. Lowerre-Barbieri, Vivian M. Nguyen, Graham D. Raby, Steven J. Cooke
Effects of food web changes on Mysis diluviana diet in Lake Ontario
Mysids are important benthic-pelagic omnivores in many deep-lake food webs, yet quantitative data on their diet are limited. We explored the trophic role of Mysis diluviana in offshore Lake Ontario using samples collected in May, July, and September 2013 with a focus on seasonal and ontogenetic patterns in herbivory and zooplanktivory using two approaches. We hypothesized that Mysis diet in 2013 d
Authors
Brian P. O'Malley, Lars G. Rudstam, James M. Watkins, Toby J. Holda, Brian C. Weidel
Egg deposition by lithophilic-spawning fishes in the Detroit and Saint Clair Rivers, 2005–14
A long-term, multiseason, fish egg sampling program conducted annually on the Detroit (2005–14) and Saint Clair (2010–14) Rivers was summarized to identify where productive fish spawning habitat currently exists. Egg mats were placed on the river bottom during the spring and fall at historic spawning areas and candidate fish spawning habitat restoration sites throughout both rivers. Widespread evi
Authors
Carson G. Prichard, Jaquelyn M. Craig, Edward F. Roseman, Jason L. Fischer, Bruce A. Manny, Gregory W. Kennedy
Spatial and temporal genetic analysis of Walleyes in the Ohio River
Previous genetic analyses have shown that Walleyes Sander vitreus in the upper Ohio River comprise two distinct genetic strains: (1) fish of Great Lakes origin that were stocked into the Ohio River basin and (2) a remnant native strain (Highlands strain). Resource agencies are developing management strategies to conserve and restore the native strain within the upper reaches of the Ohio River. Hyb
Authors
Kevin S. Page, Richard D. Zweifela, Wendylee Stott