Publications
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Spatial segregation of cisco (Coregonus artedi) and lake whitefish (C. clupeaformis) larvae in Chaumont Bay, Lake Ontario
Abstract
Two of the remaining coregonine species in Lake Ontario, cisco (Coregonus artedi) and lake whitefish (C. clupeaformis), spawn in Chaumont Bay, NY. Larvae co-occur in the spring but are difficult to distinguish morphologically. We applied genetic species identification using microsatellite DNA loci of 268 larvae from known locations in nearshore and offshore habitats in Chaumont Bay to det
Authors
James E. McKenna, Wendylee Stott, Marc Chalupnicki, James H. Johnson
Dietary versus nondietary fatty acid profiles of lake trout ecotypes from Lake Superior and Great Bear Lake: Are fish really what they eat?
Fatty acids are well-established biomarkers used to characterize trophic ecology, food-web linkages, and the ecological niche of many different taxa. Most often, fatty acids that are examined include only those previously identified as “dietary” or “extended dietary” biomarkers. Fatty acids considered as nondietary biomarkers, however, represent numerous fatty acids that can be extracted. Some stu
Authors
Louise Chavarie, John P. Hoffmann, A. M. Muir, C. C. Krueger, C.R. Bronte, K.L. Howland, S.P. Gallagher, S. P. Sitar, M.J. Hansen, Mark Vinson, L.F. Baker, L.L. Loseto, William M. Tonn, H. Swanson
Improved fish counting method accurately quantifies high‐density fish movement in dual‐frequency identification sonar data files from a coastal wetland environment
There are many ways to quantify fish movement through shallow‐water habitats, but most noninvasive methods (e.g., visual counts) are not effective in turbid coastal wetland waters of the Great Lakes. Dual‐frequency identification sonar (DIDSON) technology (Sound Metrics) offers a noninvasive, hydroacoustic‐based approach to characterize fish movement in wetlands and other habitats by collecting hi
Authors
Michael R. Eggleston, Scott W. Milne, Maxwell Ramsay, Kurt P. Kowalski
Piscivory in recovering Lake Michigan Cisco (Coregonus artedi): The role of invasive species
Contemporary conditions in Lake Michigan where cisco (Coregonus artedi) populations are expanding are vastly different from those encountered by the historic fish community. Invasive species introductions have substantially altered the Lake Michigan ecosystem in the last half century. Successful management efforts for cisco in Lake Michigan hinge on our ability to understand their contemporary eco
Authors
Ben S Breaker, Kevin L. Pangle, Kevin Donner, Jason Smith, Benjamin A. Turschak, Randall M. Claramunt, David Bunnell, Jory L. Jonas
Estimating age and growth of invasive sea lamprey: A review of approaches and investigation of a new method
We review recent advances in age and growth estimation of invasive sea lamprey (Petromyzon marinus) in the Great Lakes and present a more accurate method for growth estimation. To forecast growth and prioritize streams for control actions, sea lamprey managers currently use an average daily growth model. Here, a new linear model that included stream and lake as contributing variables was investiga
Authors
Heather A Dawson, Courtney Higgins-Weier, Todd B. Steeves, Nicholas S. Johnson
Behavioural responses of female lake trout Salvelinus namaycush to male chemical stimuli and prostaglandin F2α
Male olfactory cues may guide aggregation on spawning reefs, mate evaluation, and synchronized gamete release in lake trout Salvelinus namaycush, but a lack of information on the source and identity of the cues precludes direct tests of their function. Using a two-channel flume assay, we found female lake trout increased time spent in the channel treated with male-conditioned water, urine, and bil
Authors
Tyler John Buchinger, Weiming Li, Nicholas S. Johnson
Design and operations of the Hydrate 01 Stratigraphic test well, Alaska North Slope
The National Energy Technology Laboratory, the Japan Oil, Gas and Metals National Corporation, and the U.S. Geological Survey are leading an effort to conduct an extended gas hydrate production test in northern Alaska. The proposed production test required the drilling of an initial stratigraphic test well (STW) to confirm the geologic conditions of the proposed test site. This well was completed
Authors
Timothy S. Collett, Margarita V. Zyrianova, Norihiro Okinaka, Motoi Wakatsuki, Ray Boswell, Scott Marsteller, David Minge, Stephen Crumley, David Itter, Robert D. Hunter
Changes in conservation value from grasslands to savannas to forests: How a temperate canopy cover gradient affects butterfly community composition
Temperate savannas and grasslands are globally threatened. In the Midwest United States of America (USA), for example, oak savannas persist today at a small percentage of recent historic coverage. Therefore, restoration of habitats of low and intermediate canopy cover is a landscape conservation priority that often emphasizes returning tree density to a savanna-like target value. Understanding how
Authors
Ralph Grundel, Gary S. Dulin, Noel B. Pavlovic
Resource segregation at fine spatial scales explains Karner blue butterfly (Lycaeides melissa samuelis) distribution
The resource concentration hypothesis predicts that herbivorous insect density scales positively with plant density because insects are better able to identify, and remain longer in, patches with denser plant resources. While some studies support this hypothesis, others do not. Different explanations have been proposed for this discrepancy, including variation in insect dispersal ability and diet
Authors
Sophia N Chau, Lainey V Bristow, Ralph Grundel, Jessica J Hellmann
Adult sea lamprey respond to induced turbulence in a low current system
Manipulation of water velocities and turbulence using pumps, propellers, or jets is a promising alternative to physical water control structures to guide fish towards traps or fishways. Sea lamprey (Petromyzon marinus) are a species of concern in much of their native and invasive ranges, and their improved guidance could benefit management actions for both conservation and control. The flow veloci
Authors
Daniel P. Zielinski, Scott M. Miehls, Gordon Burns, Charles Coutant
Eradication of sea lampreys from the Laurentian Great Lakes is possible
Eradication has been achieved for many vertebrate pest control programs, primarily on small, isolated islands, but has never been considered a practical goal for invasive sea lampreys in the Laurentian Great Lakes. Our objective was to examine evidence relevant to the feasibility of setting eradication as a management goal for Great Lakes sea lampreys. Bomford and O'Brien (1995) listed six conditi
Authors
Michael L. Jones, Jean V. Adams
Growth and behavior of North American microbes on Phragmites australis leaves
Phragmites australis subsp. australis is a cosmopolitan wetland grass that is invasive in many regions of the world, including North America, where it co-occurs with the closely related Phragmites australis subsp. americanus. Because the difference in invasive behavior is unlikely to be related to physiological differences, we hypothesize that interactions with unique members of their microbiomes
Authors
Aaron E. Devries, Kurt P. Kowalski, Wesley A. Bickford