Publications
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Sex difference in PCB concentrations of a catostomid fish
Unraveling the complexities associated with the relative differences in contaminant concentrations between the sexes of mature fish may provide insights into important behavioral and physiological differences between the sexes of not just fish but higher vertebrates as well. Whole-fish polychlorinated biphenyl (PCB) concentrations were determined in 25 mature female white suckers (Catostomus comme
Authors
Charles P. Madenjian, Andrew L. Stevens, Martin A. Stapanian, Stuart A. Batterman, Sergei M. Chernyak, Jordan E. Menczer, Peter B. McIntyre
Feeding ecology of the walleye (Percidae, Sander vitreus), a resurgent piscivore in Lake Huron (Laurentian Great Lakes) after shifts in the prey community
Recovering populations of piscivores can challenge understanding of ecosystem function due to impacts on prey and to potentially altered food webs supporting their production. Stocks of walleye (Percidae, Sander vitreus), an apex predator in the Laurentian Great Lakes, crashed in the mid‐1900s. Management efforts led to recovery by 2009, but recovery coincided with environmental and fish community
Authors
Steven A. Pothoven, Charles P. Madenjian, Tomas O. Höök
Increased pheromone signaling by small male sea lamprey has distinct effects on female mate search and courtship
Male body size affects access to mates in many animals. Attributes of sexual signals often correlate with body size due to physiological constraints on signal production. Larger males generally produce larger signals, but costs of being large or compensation by small males can result in smaller males producing signals of equal or greater magnitude. Female choice following multiple male traits with
Authors
Tyler J. Buchinger, Ugo Bussy, Ethan G. Buchinger, Skye D. Fissette, Weiming Li, Nicholas S. Johnson
Vertical distribution of alewife in the Lake Ontario offshore: Implications for resource use
Oligotrophication of Lake Ontario has led to increased water clarity and an increased proportion of zooplankton residing in the metalimnion during the day, which may affect the utilization of different depth regions for planktivorous fish. We investigated day and night distributions of fish using hydroacoustics and suspended vertical gillnets during the summer of 2013 when a deep chlorophyll layer
Authors
Milan Riha, Maureen Walsh, Michael J. Connerton, Jeremy Holden, Brian C. Weidel, Patrick J. Sullivan, Toby J. Holda, Lars G. Rudstam
Nearshore fish community
Lake Ontario’s nearshore fish community consists of a diverse assemblage of warm- and cool-water species. The “nearshore zone,” loosely separated from the “offshore zones” by the 15-m depth contour, consists of complex habitats spanning a gamut from vast open-coastal areas to sheltered embayments and wetlands. Lake Ontario’s nearshore habitat has been affected to varying degrees by human activitie
Authors
James A. Hoyle, Michael J. Connerton, Dawn E. Dittman, Dimitry Gorsky, Jana R. Lantry, Alastair Mathers, Scott L. Schlueter, Maureen Walsh, Brian C. Weidel, Michael J. Yuille
Age, year‐class strength variability, and partial age validation of Kiyis from Lake Superior
ge estimates of Lake Superior Kiyis Coregonus kiyi from scales and otoliths were compared and 12 years (2003–2014) of length frequency data were examined to assess year‐class strength and validate age estimates. Ages estimated from otoliths were precise and were consistently older than ages estimated from scales. Maximum otolith‐derived ages were 20 years for females and 12 years for males. Age es
Authors
Taylor A. Lepak, Derek H. Ogle, Mark Vinson
Habitat use by juvenile salmonids in Lake Ontario tributaries-species, age, diel and seasonal effects
Understanding the habitat needs of fish and how these requirements may change seasonally over a 24-h period is important, especially for highly managed sport species. Consequently, we examined the diel and seasonal habitat use of four juvenile salmonid species in streams in the Lake Ontario watershed. For juvenile Atlantic salmon Salmo salarand juvenile rainbow trout Oncorhynchus mykiss, differenc
Authors
James H. Johnson, James E. McKenna
Biotic and abiotic factors influencing zooplankton vertical distribution in Lake Huron
The vertical distribution of zooplankton can have substantial influence on trophic structure in freshwater systems, particularly by determining spatial overlap for predator/prey dynamics and influencing energy transfer. The zooplankton community in some of the Laurentian Great Lakes has undergone changes in composition and declines in total biomass, especially after 2003. Mechanisms underlying the
Authors
Carly J. Nowicki, David B. Bunnell, Patricia M. Dieter, David M. Warner, Henry A. Vanderploeg, Joann F. Cavaletto, Christine M. Mayer, Jean V. Adams
Simulated effects of YY-male stocking and manual suppression for eradicating nonnative Brook Trout populations
Eradication of nonnative Brook Trout Salvelinus fontinalis populations is difficult to achieve with standard techniques, such as electrofishing removal or piscicides; new approaches are needed. A novel concept is to stock “supermale” hatchery fish with wild conspecifics. Supermales (MYY) have two Y-chromosomes, resulting in offspring that are all males; over time, successful supermale reproduction
Authors
Daniel J. Schill, Kevin A. Meyer, Michael J. Hansen
2016 Lake Michigan Lake Trout Working Group Report
This report provides a review on the progression of lake trout rehabilitation towards meeting the Salmonine Fish Community Objectives (FCOs) for Lake Michigan (Eshenroder et. al. 1995) and the interim goal and evaluation objectives articulated in A Fisheries Management Implementation Strategy for the Rehabilitation of Lake Trout in Lake Michigan (Dexter et al. 2011); we also include data describin
Authors
Charles P. Madenjian, Brian Breidert, David Boyarski, Charles R. Bronte, Ben Dickinson, Kevin Donner, Mark P. Ebener, Roger Gordon, Dale Hanson, Mark Holey, John Janssen, Jory Jonas, Matthew Kornis, Erik Olsen, Steve Robillard, Ted Treska, Barry Weldon, Greg D. Wright
Corresponding long-term shifts in stream temperature and invasive fish migration
By investigating historic trapping records of invasive sea lamprey (Petromyzon marinus) throughout tributaries to the Laurentian Great Lakes, we found that upstream spawning migration timing was highly correlated with stream temperatures over large spatial and temporal scales. Furthermore, several streams in our study exceeded a critical spring thermal threshold (i.e., 15°C) and experienced peak s
Authors
Erin L. McCann, Nicholas S. Johnson, Kevin Pangle
Report from the Workshop on Coregonine Restoration Science
SummaryGreat Lakes fishery managers have the opportunity and have expressed interest in reestablishing a native forage base in the Great Lakes consisting of various forms and species within the genus Coregonus. This report summarizes the proceedings of a workshop focused on a subset of the genus, and the term “coregonines” is used to refer to several species of deepwater ciscoes (also known as “ch
Authors
Charles R. Bronte, David B. Bunnell, Solomon R. David, Roger Gordon, Dimitry Gorsky, Michael J. Millard, Jennifer Read, Roy A. Stein, Lynn Vaccaro