Charles P Madenjian, PhD
Charles P. Madenjian is a Research Fishery Biologist in the Lake Michigan Section of the Deepwater Sciences Branch of the U.S. Geological Survey (USGS) Great Lakes Science Center. He is stationed at the USGS Great Lakes Science Center headquarters in Ann Arbor, Michigan.
The scientist’s research efforts can be categorized into four theme areas: (1) fish community dynamics and native fish restoration in the Laurentian Great Lakes, (2) invasion biology in the Laurentian Great Lakes, (3) bioenergetics modeling, and (4) contaminant accumulation in fish. The scope of the scientist’s research varies across these four theme areas. For fish community dynamics, native fish restoration, and invasion biology, the scientist’s research is focused on Lake Michigan, given the scientist’s assignment to the Lake Michigan Section. However, comparing Lake Michigan with the other Laurentian Great Lakes is within the scientist’s scope of research. Much of the scientist’s research work emanates from these inter-lake comparisons. Data available for analysis of fish community dynamics, native fish restoration, and invasion biology extend back to the 1960s, or even earlier in some cases. These long-term time series represent a valuable resource for trying to identify the important factors regulating fish community dynamics, native fish restoration, and effects of invasives on the fish community. For bioenergetics modeling and contaminant accumulation in fish, the scientist’s focus is on the Laurentian Great Lakes. Nonetheless, for both bioenergetics modeling and contaminant accumulation in fish, the scientist’s scope of research is global, because the scientist examines results from studies around the world to advance our knowledge in both fields. Bioenergetics modeling can be applied to organisms and populations around the world. Analogously, fish from all areas of the globe accumulate environmental contaminants, such as mercury (Hg) and polychlorinated biphenyls (PCBs). The scientist collaborates with scientists and researchers both within the Laurentian Great Lakes basin and outside the basin, with most of the collaborations within the basin. Even so, collaborations have been forged with researchers across the United States, Canada, Europe, and China. Much of the funding received by the scientist is drawn from the base budget of the USGS Great Lakes Science Center (GLSC), because the GLSC has been mandated to maintain long-term surveys for fish communities in the Laurentian Great Lakes, and maintaining these surveys is part of the scientist’s assigned duties. Supplemental funding has been provided by the Great Lakes Fishery Commission, the Great Lakes Fishery Trust, the Great Lakes Fish and Wildlife Restoration Act, and the USGS Climate Adaptation Science Center.
Professional Experience
March 1995-present; Research Fishery Biologist; NBS/USGS Great Lakes Science Center. Duties: Research on prey fish dynamics, food web dynamics, lake trout population dynamics in Lakes Michigan and Huron, laboratory and field evaluations of fish bioenergetics models, using PCBs as a tracer of food consumption by fish, contaminant accumulation in fish, effects of invasives on food web dynamic
January 1992-March 1995; Research Fishery Biologist; USFWS/NBS Lake Erie Biological Station. Duties: Research on life-history characteristics, population dynamics, and stock-recruitment relationships of Lake Erie fishes; also bioenergetics modeling of zebra mussels and waterbirds.
1990-1991; Associate Researcher; Center for Limnology, University of Wisconsin. Duties: Research on variability in contaminant accumulation rates within populations of Lake Michigan salmonines, via individual-based modeling.
1989-1990; Postdoctoral Fellow; Center for Limnology, University of Wisconsin. Duties: Basic and applied research on variability in growth rates of age-0 walleyes (Sander vitreus), using individual-based modeling.
1988-1989; Associate Researcher; Hawaii Natural Energy Institute, University of Hawaii. Duties: Research on prediction of primary production and secondary production in artificial upwellings, via computer simulation modeling.
1983-1988; Graduate Research Assistant; Hawaii Institute of Marine Biology, University of Hawaii. Duties: Research on predicting overnight loss of dissolved oxygen from aquaculture ponds, using computer simulation modeling.
1980-1983; Research Associate; Great Lakes Research Division, University of Michigan. Duties: Research on the impact of the J. H. Campbell Power Plant and D. C. Cook Power Plant on fish populations in eastern Lake Michigan.
1978-1980; Research Assistant; Great Lakes Research Division, University of Michigan. Duties: Research on the impact of the J. H. Campbell Power Plant on fish populations in eastern Lake Michigan.
1977-1978; Research Assistant; University of Michigan. Duties: Research on time series analysis of fishery catch and effort.
1976-1977; Teaching Assistant; School of Natural Resources, University of Michigan. Duties: Assisted in teaching an introductory course on applied statistics.
Education and Certifications
Ph.D., Zoology, University of Hawaii, 1988.
M.S., Resource Ecology, University of Michigan, 1979.
B.S., Aquatic Biology (minor in mathematics), Rutgers University, 1975.
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Females exceed males in mercury concentrations of burbot Lota lota
Status and trends of prey fish populations in Lake Michigan, 2014
Status and trends of prey fish populations in Lake Michigan, 2013
Temperature effects induced by climate change on the growth and consumption by salmonines in Lakes Michigan and Huron
Coupling age-structured stock assessment and fish bioenergetics models: a system of time-varying models for quantifying piscivory patterns during the rapid trophic shift in the main basin of Lake Huron
Non-stationary recruitment dynamics of rainbow smelt: the influence of environmental variables and variation in size structure and length-at-maturation
Changes in the Lake Michigan food web following dreissenid mussel invasions: A synthesis
Mercury concentrations of bluegill (Lepomis macrochirus) vary by sex
Bioenergetics modeling of percid fishes
Lake Michigan offshore ecosystem structure and food web changes from 1987 to 2008
Feeding habits of an endemic fish, Oxygymnocypris stewartii, in the Yarlung Zangbo River in Tibet, China
Population-level effects of egg predation on a native planktivore in a large freshwater lake
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Filter Total Items: 161Females exceed males in mercury concentrations of burbot Lota lota
Examination of differences in contaminant concentrations between sexes of fish, across several fish species, may reveal clues for important behavioral and physiological differences between the sexes. We determined whole-fish total mercury (Hg) concentrations of 25 male and 25 female adult burbot Lota lota captured in Lake Erie during summer 2011, and of 14 male and 18 female adult burbot capturedAuthorsCharles P. Madenjian, Martin A. Stapanian, Peter A. Cott, David P. Krabbenhoft, William Edwards, Lynn M. Ogilvie, Justin G. Mychek-Londer, John F. DeWildStatus and trends of prey fish populations in Lake Michigan, 2014
The U.S. Geological Survey Great Lakes Science Center has conducted lake-wide surveys of the fish community in Lake Michigan each fall since 1973 using standard 12-m bottom trawls towed along contour at depths of 9 to 110 m at each of seven index transects. The resulting data on relative abundance, size and age structure, and condition of individual fishes are used to estimate various populationAuthorsDavid B. Bunnell, Charles P. Madenjian, Timothy J. Desorcie, Melissa Jean Kostich, Whitney Woelmer, Jean V. AdamsStatus and trends of prey fish populations in Lake Michigan, 2013
The U.S. Geological Survey Great Lakes Science Center has conducted lake-wide surveys of the fish community in Lake Michigan each fall since 1973 using standard 12-m bottom trawls towed along contour at depths of 9 to 110 m at each of seven index transects. The resulting data on relative abundance, size and age structure, and condition of individual fishes are used to estimate various population pAuthorsCharles P. Madenjian, David B. Bunnell, Timothy J. Desorcie, Melissa Jean Kostich, Patricia M. Dieter, Jean V. AdamsTemperature effects induced by climate change on the growth and consumption by salmonines in Lakes Michigan and Huron
We used bioenergetics models to investigate temperature effects induced by climate change on the growth and consumption by Chinook salmon Oncorhynchus tshawytscha, lake trout Salvelinus namaycush, and steelhead O. mykiss in Lakes Michigan and Huron. We updated biological inputs to account for recent changes in the food webs and used temperature inputs in response to regional climate observed in thAuthorsYu-Chun Kao, Charles P. Madenjian, David B. Bunnell, Brent M. Lofgren, Marjorie PerroudCoupling age-structured stock assessment and fish bioenergetics models: a system of time-varying models for quantifying piscivory patterns during the rapid trophic shift in the main basin of Lake Huron
We quantified piscivory patterns in the main basin of Lake Huron during 1984–2010 and found that the biomass transfer from prey fish to piscivores remained consistently high despite the rapid major trophic shift in the food webs. We coupled age-structured stock assessment models and fish bioenergetics models for lake trout (Salvelinus namaycush), Chinook salmon (Oncorhynchus tshawytscha), walleyeAuthorsJi X. He, James R. Bence, Charles P. Madenjian, Steven A. Pothoven, Norine E. Dobiesz, David G. Fielder, James E. Johnson, Mark P. Ebener, Adam R. Cottrill, Lloyd C. Mohr, Scott R. KoproskiNon-stationary recruitment dynamics of rainbow smelt: the influence of environmental variables and variation in size structure and length-at-maturation
Fish stock-recruitment dynamics may be difficult to elucidate because of nonstationary relationships resulting from shifting environmental conditions and fluctuations in important vital rates such as individual growth or maturation. The Great Lakes have experienced environmental stressors that may have changed population demographics and stock-recruitment relationships while causing the declines oAuthorsZachary S. Feiner, David B. Bunnell, Tomas O. Hook, Charles P. Madenjian, David M. Warner, Paris D. CollingsworthChanges in the Lake Michigan food web following dreissenid mussel invasions: A synthesis
Using various available time series for Lake Michigan, we examined changes in the Lake Michigan food web following the dreissenid mussel invasions and identified those changes most likely attributable to these invasions, thereby providing a synthesis. Expansion of the quagga mussel (Dreissena rostriformis bugensis) population into deeper waters, which began around 2004, appeared to have a substantAuthorsCharles P. Madenjian, David B. Bunnell, David M. Warner, Steven A. Pothoven, Gary L. Fahnenstiel, Thomas F. Nalepa, Henry A. Vanderploeg, Iyob Tsehaye, Randall M. Claramunt, Richard D ClarkMercury concentrations of bluegill (Lepomis macrochirus) vary by sex
Patterns in relative differences in contaminant concentrations between the sexes across many species of fish may reveal clues for important behavioral and physiological differences between the sexes, and may also be useful in developing fish consumption advisories and efficient designs for programs meant to monitor contaminant levels in fish. We determined skin-off fillet and whole-fish total mercAuthorsCharles P. Madenjian, James T. Francis, Jeffrey J. Braunscheidel, Joseph R. Bohr, Matthew J. Geiger, G. Mark KnottnerusBioenergetics modeling of percid fishes
A bioenergetics model for a percid fish represents a quantitative description of the fish’s energy budget. Bioenergetics modeling can be used to identify the important factors determining growth of percids in lakes, rivers, or seas. For example, bioenergetics modeling applied to yellow perch (Perca flavescens) in the western and central basins of Lake Erie revealed that the slower growth in the weAuthorsCharles P. MadenjianLake Michigan offshore ecosystem structure and food web changes from 1987 to 2008
Ecosystems undergo dynamic changes owing to species invasions, fisheries management decisions, landscape modifications, and nutrient inputs. At Lake Michigan, new invaders (e.g., dreissenid mussels (Dreissena spp.), spiny water flea (Bythotrephes longimanus), round goby (Neogobius melanostomus)) have proliferated and altered energy transfer pathways, while nutrient concentrations and stocking rateAuthorsMark W. Rogers, David B. Bunnell, Charles P. Madenjian, David M. WarnerFeeding habits of an endemic fish, Oxygymnocypris stewartii, in the Yarlung Zangbo River in Tibet, China
Feeding habits of Oxygymnocypris stewartii were investigated based on monthly sampling in the Yarlung Zangbo River from August 2008 to August 2009. The gut contents of 194 individuals were analysed and quantified with numerical and gravimetric methods. This species can be considered a generalized and opportunistic predator feeding both on teleosts and aquatic insects. A multivariate analysis reveaAuthorsBin Huo, Cong Xin Xie, Charles P. Madenjian, Bao Shan Ma, Xue Feng Yang, Hai Ping HuangPopulation-level effects of egg predation on a native planktivore in a large freshwater lake
Using a 37-year recruitment time series, we uncovered a field pattern revealing a strong, inverse relationship between bloater Coregonus hoyi recruitment success and slimy sculpin Cottus cognatus biomass in Lake Michigan (United States), one of the largest freshwater lakes of the world. Given that slimy sculpins (and deepwater sculpin Myoxocephalus thompsonii) are known egg predators that spatioteAuthorsDavid B. Bunnell, Justin G. Mychek-Londer, Charles P. Madenjian - News