Publications
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Survival and metamorphosis of larval sea lamprey (Petromyzon marinus) residing in Lakes Michigan and Huron near river mouths
Although population demographics of larval lampreys in streams have been studied extensively, demographics in lake environments have not. Here, we estimated survival and rates of metamorphosis for larval sea lamprey (Petromyzon marinus) populations residing in the Great Lakes near river mouths (hereafter termed lentic areas). Tagged larvae were stocked and a Bayesian multi-state tag-recovery model
Authors
Nicholas S. Johnson, Travis O. Brenden, William D. Swink, Mathew A. Lipps
Population-specific life histories contribute to metapopulation viability
Restoration efforts can be improved by understanding how variations in life-history traits occur within populations of the same species living in different environments. This can be done by first understanding the demographic responses of natural occurring populations. Population viability analysis continues to be useful to species management and conservation with sensitivity analysis aiding in th
Authors
Samniqueka J. Halsey, Timothy J. Bell, Kathryn McEachern, Noel B. Pavlovic
Contribution of manipulable and non-manipulable environmental factors to trapping efficiency of invasive sea lamprey
We identified aspects of the trapping process that afforded opportunities for improving trap efficiency of invasive sea lamprey (Petromyzon marinus) in a Great Lake's tributary. Capturing a sea lamprey requires it to encounter the trap, enter, and be retained until removed. Probabilities of these events depend on the interplay between sea lamprey behavior, environmental conditions, and trap design
Authors
Heather A. Dawson, Gale Bravener, Joshua Beaulaurier, Nicholas S. Johnson, Michael Twohey, Robert L. McLaughlin, Travis O. Brenden
Sea lamprey avoid areas scented with conspecific tissue extract in Michigan streams
Three in-stream experiments were conducted to determine whether sea lamprey, Petromyzon marinus L., tissue extract (alarm cue) and 2-phenylethylamine hydrochloride (PEA HCl, a putative predator cue) influenced the distribution of migrating adult sea lamprey. Experiments evaluated sea lamprey movement when an odour was applied to (1) a tributary of a larger stream; and (2) half of a stream channel.
Authors
Richard Di Rocco, Nicholas S. Johnson, Linnea Brege, I. Imre, G.E. Brown
Challenge to the model of lake charr evolution: Shallow- and deep-water morphs exist within a small postglacial lake
All examples of lake charr (Salvelinus namaycush) diversity occur within the largest, deepest lakes of North America (i.e. >Â 2000Â km2). We report here Rush Lake (1.3Â km2) as the first example of a small lake with two lake charr morphs (lean and huronicus). Morphology, diet, life history, and genetics were examined to demonstrate the existence of morphs and determine the potential influence of evol
Authors
Louise Chavarie, Andrew M. Muir, Mara S. Zimmerman, Shauna M. Baillie, Michael J. Hansen, Nancy A. Nate, Daniel L. Yule, Trevor Middel, Paul Bentzen, Charles C. Krueger
Probability of acoustic transmitter detections by receiver lines in Lake Huron: results of multi-year field tests and simulations
BackgroundAdvances in acoustic telemetry technology have led to an improved understanding of the spatial ecology of many freshwater and marine fish species. Understanding the performance of acoustic receivers is necessary to distinguish between tagged fish that may have been present but not detected and from those fish that were absent from the area. In this study, two stationary acoustic transmit
Authors
Todd A. Hayden, Christopher M. Holbrook, Thomas Binder, John M. Dettmers, Steven J. Cooke, Christopher S. Vandergoot, Charles C. Krueger
Effects of consumption-oriented versus trophy-oriented fisheries on Muskellunge population size structure in northern Wisconsin
To determine whether a consumption-oriented fishery was compatible with a trophy-oriented fishery for Muskellunge Esox masquinongy, we modeled effects of a spearing fishery and recreational angling fishery on population size structure (i.e., numbers of fish ≥ 102, 114, and 127 cm) in northern Wisconsin. An individual-based simulation model was used to quantify the effect of harvest mortality at cu
Authors
Matthew D. Faust, Michael J. Hansen
Genetic and phenotypic variation along an ecological gradient in lake trout Salvelinus namaycush
BackgroundAdaptive radiation involving a colonizing phenotype that rapidly evolves into at least one other ecological variant, or ecotype, has been observed in a variety of freshwater fishes in post-glacial environments. However, few studies consider how phenotypic traits vary with regard to neutral genetic partitioning along ecological gradients. Here, we present the first detailed investigation
Authors
Shauna M. Baillie, Andrew M. Muir, Michael J. Hansen, Charles C. Krueger, Paul Bentzen
Virulence and biodegradation potential of dynamic microbial communities associated with decaying Cladophora in Great Lakes
Cladophora mats that accumulate and decompose along shorelines of the Great Lakes create potential threats to the health of humans and wildlife. The decaying algae create a low oxygen and redox potential environment favoring growth and persistence of anaerobic microbial populations, including Clostridium botulinum, the causal agent of botulism in humans, birds, and other wildlife. In addition to t
Authors
Chan Lan Chun, Julie R. Peller, Dawn Shively, Muruleedhara N. Byappanahalli, Richard L. Whitman, Christopher Staley, Qian Zhang, Satoshi Ishii, Michael J. Sadowsky
Demographic characteristics of an adfluvial bull trout population in Lake Pend Oreille, Idaho
Introductions of nonnative species, habitat loss, and stream fragmentation have caused the Bull Trout Salvelinus confluentus to decline throughout much of its native distribution. Consequently, in June 1998, the Bull Trout was listed under the U.S. Endangered Species Act as threatened. The Bull Trout has existed in Lake Pend Oreille and its surrounding tributaries since the last ice age, and the l
Authors
Jonathan L McCubbins, Michael J. Hansen, Joseph M DosSantos, Andrew M. Dux
Large-scale changes in bloater growth and condition in Lake Huron
Native Bloaters Coregonus hoyi have exhibited multiple strong year-classes since 2005 and now are the most abundant benthopelagic offshore prey fish in Lake Huron, following the crash of nonnative AlewivesAlosa pseudoharengus and substantial declines in nonnative Rainbow Smelt Osmerus mordax. Despite recent recoveries in Bloater abundance, marketable-size (>229 mm) Bloaters remain scarce. We used
Authors
Carson G. Prichard, Edward F. Roseman, Kevin M. Keeler, Timothy P. O'Brien, Stephen C. Riley
Effects of lake trout refuges on lake whitefish and cisco in the Apostle Islands Region of Lake Superior
Lake trout refuges in the Apostle Islands region of Lake Superior are analogous to the concept of marine protected areas. These refuges, established specifically for lake trout (Salvelinus namaycush) and closed to most forms of recreational and commercial fishing, were implicated as one of several management actions leading to successful rehabilitation of Lake Superior lake trout. To investigate t
Authors
Chiara M. Zuccarino-Crowe, William W. Taylor, Michael J. Hansen, Michael J. Seider, Charles C. Krueger