Publications
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Telemetry narrows the search for sea lamprey spawning locations in the St. Clair-Detroit River System
Adult sea lamprey (Petromyzon marinus) abundance in Lake Erie has remained above targets set by fishery managers since 2005, possibly due to increased recruitment in the St. Clair-Detroit River System (SCDRS). Sea lamprey recruitment in the SCDRS poses an enormous challenge to sea lamprey control and assessment in Lake Erie because the SCDRS contains no dams to facilitate capture and discharge is
Authors
Christopher Holbrook, Aaron K. Jubar, Jessica M. Barber, Kevin Tallon, Darryl W. Hondorp
A portable trap with electric lead catches up to 75% of an invasive fish species
A novel system combining a trap and pulsed direct current electricity was able to catch up to 75% of tagged invasive sea lamprey Petromyzon marinus in free-flowing streams. Non-target mortality was rare and impacts to non-target migration were minimal; likely because pulsed direct current only needed to be activated at night (7 hours of each day). The system was completely portable and the annual
Authors
Nicholas S. Johnson, Scott M. Miehls, Lisa M. O'Connor, Gale Bravener, Jessica Barber, Henry T. Thompson, John A. Tix, Tyler Bruning
Alternative method of removing otoliths from sturgeon
Extracting the otoliths (ear bones) from fish that have very thick skulls can be difficult and very time consuming. The common practice of making a transverse vertical incision on the top of the skull with a hand or electrical saw may damage the otolith if not performed correctly. Sturgeons (Acipenseridae) are one family in particular that have a very large and thick skull. A new laboratory method
Authors
Marc A. Chalupnicki, Dawn E. Dittman
Glass-eel-stage American Eels respond to conspecific odor as a function of concentration
The American Eel Anguilla rostrata has experienced staggering population declines in recent decades and is now the focus of restoration efforts. Studies have demonstrated that olfaction is critical to anguillid behavior and that glass eels (the life stage which migrates inland from saltwater to freshwater) are attracted to conspecific washings. We evaluated conspecific cueing as a potential mechan
Authors
Andrew K. Schmucker, Nicholas S. Johnson, Heather S. Galbraith, Weiming Li
Comparative diets of subyearling Atlantic salmon and subyearling coho salmon in Lake Ontario tributaries
Restoration of Atlantic salmon (Salmo salar) in Lake Ontario could potentially be negatively affected by the presence of non-native salmonids that are naturalized in the basin. Coho salmon (Oncorhynchus kisutch) have been spawning successfully in Lake Ontario tributaries for over 40Â years and their juveniles will reside in streams with juvenile Atlantic salmon for one year. This study sought to ex
Authors
James H. Johnson, Neil H. Ringler
Five-year evaluation of habitat remediation in Thunder Bay, Lake Huron: Comparison of constructed reef characteristics that attract spawning lake trout
Degradation of aquatic habitats has motivated construction and research on the use of artificial reefs to enhance production of fish populations. However, reefs are often poorly planned, reef design characteristics are not evaluated, and reef assessments are short-term. We constructed 29 reefs in Thunder Bay, Lake Huron, in 2010 and 2011 to mitigate for degradation of a putative lake trout spawnin
Authors
J. Ellen Marsden, Thomas R. Binder, James Johnson, Ji He, Natalie Dingledine, Janice Adams, Nicholas S. Johnson, Tyler J. Buchinger, Charles C. Krueger
First direct confirmation of grass carp spawning in a Great Lakes tributary
Grass carp (Ctenopharyngodon idella), an invasive species of Asian carp, has been stocked for many decades in the United States for vegetation control. Adult individuals have been found in all of the Great Lakes except Lake Superior, but no self-sustaining populations have yet been identified in Great Lakes tributaries. In 2012, a commercial fisherman caught four juvenile diploid grass carp in the
Authors
Holly S. Embke, Patrick M. KoÄŤovskĂ˝, Cathy A. Richter, Jeremy J. Pritt, Christine M. Mayer, Song Qian
Internal loading of phosphorus in western Lake Erie
This study applied eight techniques to obtain estimates of the diffusive flux of phosphorus (P) from bottom sediments throughout the western basin of Lake Erie. The flux was quantified from both aerobic and anaerobic incubations of whole cores; by monitoring the water encapsulated in bottom chambers; from pore water concentration profiles measured with a phosphate microelectrode, a diffusive equil
Authors
Gerald Matisoff, Eliza M. Kaltenberg, Rebecca L. Steely, Stephanie K. Hummel, Jinyu Seo, Kenneth J. Gibbons, Thomas B. Bridgeman, Youngwoo Seo, Mohsen Behbahani, William F. James, Laura Johnson, Phuong Doan, Maria Dittrich, Mary Anne Evans, Justin D. Chaffin
An automated approach to Litchfield and Wilcoxon's evaluation of dose–effect experiments using the R package LW1949
The authors developed a package, LW1949, for use with the statistical software R to automatically carry out the manual steps of Litchfield and Wilcoxon's method of evaluating dose–effect experiments. The LW1949 package consistently finds the best fitting dose–effect relation by minimizing the chi-squared statistic of the observed and expected number of affected individuals and substantially speeds
Authors
Jean V. Adams, Karen Slaght, Michael A. Boogaard
Theory and application of semiochemicals in nuisance fish control
Controlling unwanted, or nuisance, fishes is becoming an increasingly urgent issue with few obvious solutions. Because fish rely heavily on semiochemicals, or chemical compounds that convey information between and within species, to mediate aspects of their life histories, these compounds are increasingly being considered as an option to help control wild fish. Possible uses of semiochemicals incl
Authors
Peter W. Sorensen, Nicholas S. Johnson
Assessing the influence of watershed characteristics on chlorophyll a in waterbodies at global and regional scales
Prediction of primary production of lentic water bodies (i.e., lakes and reservoirs) is valuable to researchers and resource managers alike, but is very rarely done at the global scale. With the development of remote sensing technologies, it is now feasible to gather large amounts of data across the world, including understudied and remote regions. To determine which factors were most important in
Authors
Whitney Woelmer, Yu-Chun Kao, David B. Bunnell, Andrew M. Deines, David Bennion, Mark W. Rogers, Colin N. Brooks, Michael J. Sayers, David M. Banach, Amanda G. Grimm, Robert A. Shuchman
Islands in the ice stream: were spawning habitats for native salmonids in the Great Lakes created by paleo-ice streams?
Lake trout Salvelinus namaycush, lake whitefish Coregonus clupeaformis and cisco Coregonus artedi are salmonid fishes native to the Laurentian Great Lakes that spawn on rocky substrates in the fall and early winter. After comparing the locations of spawning habitat for these species in the main basin of Lake Huron with surficial substrates and the hypothesized locations of fast-flowing Late Wiscon
Authors
Stephen Riley, Thomas R. Binder, Taaja R. Tucker, John Menzies, Nick Eyles, John Janssen, Andrew M. Muir, Peter C. Esselman, Nigel J. Wattrus, Charles C. Krueger