A5062264123- Fish Ecology and Management Studies
- Aquatic Invertebrate Ecology and Behavior
- Marine and fisheries research
- Fish Biology and Ecology Studies
- Fish biology, ecology, and behavior
- Aquatic Ecosystems and Phytoplankton Dynamics
- Hydrology and Sediment Transport Processes
- Water Quality and Resources Studies
- Isotope Analysis in Ecology
- Wildlife Ecology and Conservation
- Soil and Water Nutrient Dynamics
- Freshwater macroinvertebrate diversity and ecology
- Mercury impact and mitigation studies
- Environmental DNA in Biodiversity Studies
- Aquaculture Nutrition and Growth
- Flood Risk Assessment and Management
- Hydrology and Watershed Management Studies
- Water resources management and optimization
- Aquaculture disease management and microbiota
- Marine animal studies overview
- Identification and Quantification in Food
- Marine and coastal ecosystems
- Cephalopods and Marine Biology
- Maritime Security and History
- Toxic Organic Pollutants Impact
Great Lakes Fishery Commission
2015-2024
Michigan United
2014
University of Illinois Urbana-Champaign
2001-2012
Illinois Department of Natural Resources
2003-2012
Illinois Archaeological Survey
2008-2012
Great Lakes Science Center
2001-2012
Michigan Department of Natural Resources
2008
Smithsonian Environmental Research Center
2006
North Carolina State University
2006
University of Maryland Center for Environmental Science
2006
The trophic cascade hypothesis currently being tested in north temperate systems may not apply to open-water communities lower latitude U.S. reservoirs. These reservoir differ dramatically from northern lakes that an omnivore, gizzard shad (Dorosoma cepedianum), often occurs abundance. Neither controlled by fish predators (owing high fecundity and low vulnerability) nor their zooplankton prey (following the midsummer decline, consume detritus phytoplankton), regulate community composition...
Fish migration in large freshwater lacustrine systems such as the Laurentian Great Lakes is not well understood. The walleye (Sander vitreus) an economically and ecologically important native fish species throughout Lakes. In Lake Huron has recently undergone a population expansion result of recovery primary stock, stemming from changing food web dynamics. During 2011 2012, we used acoustic telemetry to document timing spatial scale Saginaw Bay. Spawning (n = 199) collected tributary Bay...
Because peak abundance of larval gizzard shad Dorosoma cepedianum occurs simultaneously with the midsummer decline macrozooplankton in Ohio reservoirs, we hypothesized that zooplanktivory by caused this decline. To test hypothesis, compared food consumption zooplankton productivity two reservoirs. Larval began to influence production a reservoir high (exceeding 125 mg·m−3·d−1) only after biomass occurred, even at densities (38 shad·m−3). However, early juvenile (25−30-mm) severely reduced...
Abstract Zooplankton availability is strongly linked with the growth, survival, and ultimately recruitment of fish during their early life history. We examined how different types zooplankton affected prey selection larval yellow perch Perca flavescens in a series laboratory experiments. The growth survival newly hatched (5–7‐mm) to 12‐mm larvae was greatest when feeding on adult copepods copepod nauplii. longer than 12 mm small cladocerans. Prey patterns closely followed trends survival;...
Thermoregulation is presumed to be a widespread determinant of behaviour in fishes, but has not often been investigated as mechanism shaping long-distance migrations. We used acoustic telemetry and animal-borne thermal loggers test the hypothesis that seasonal migration adult walleye (Sander vitreus) Lake Erie size- (or) sex-specific related behavioural thermoregulation. Female migrated out warm, shallow western basin earlier than did males were 1.8 times more likely detected on receivers...
Similar to many freshwater ecosystems, the Laurentian Great Lakes of North America have undergone numerous anthropogenic stressors resulting in considerable loss biodiversity and habitat. Among fishes, coregonine sub-family has endured most extensive declines, including extinction several species ( Coregonus johannae, C. alpenae, kiyi orientalis) at least 10 instances local extirpations other nigripinnis, reighardi, zenithicus, hoyi, artedi) across all 5 lakes, much which occurred prior...
The dreissenid mussel invasion of Lake Michigan during the 1990s has been linked to a concomitant decrease in abundance amphipod Diporeia. We tracked seasonal energy dynamics alewife (Alosa pseudoharengus) 20022004 and compared our findings with previously published results for years 19791981. Adult density exhibited pronounced cycle both pre-invasion post-invasion periods, October or November nearly twice as high that early summer. However, on average, adult was 23% lower period period....
Abstract Anesthetics immobilize fish, reducing physical damage and stress during aquaculture practices, stock assessment, experimental procedures. Currently, only tricaine methanesulfonate (MS‐222) is approved for use as an anesthetic food fish in Canada the United States; however, MS‐222 can be used with certain species, treated must held a specified period of time before release into wild. Two forms electroanesthesia carbon dioxide (CO 2 ) were evaluated anesthetics adult walleye Sander...
ABSTRACT The combined destructive effects of overfishing, habitat destruction, and invasive species, especially alewife ( Alosa pseudoharengus ) sea lamprey Petromyzon marinus led to the loss native top predator lake trout Salvelinus namaycush from most Great Lakes by 1960. Alewife populations then exploded, creating nuisance die‐offs. Public demands for action, coupled with control lamprey, allowed fishery managers consider stocking Pacific salmon establish a recreational fishery. This...
Abstract Environmental factors such as turbidity and habitat complexity affect many aspects of aquatic food webs, including predator–prey interactions. We examined the effects (0, 5, 10, 20, 40 nephelometric units [NTU]) cover (presence or absence) on prey selection by adult smallmouth bass Micropterus dolomieu (mean ± SD = 290 41 mm total length) in laboratory pools. Individual predators were given a choice five northern crayfish Orconectes virilis , golden shiners Notemigonus crysoleucas...
Lipid concentration and fatty acid composition of common prey species or taxonomic groups from four distinct regions Lake Michigan were quantified (n = 894). We used a combination parametric nonparametric statistics to assess the differences in signatures (FAS) among evaluate intraspecies variation relative interspecies FAS. Discriminant function analysis performed on 13 taxa using 18 most abundant acids revealed clear separation taxa, with overall classification success reaching 89%....
Abstract Fidelity to spawning habitats can maximise reproductive success of fish by synchronising movements sites previous recruitment. To determine the role fidelity in structuring walleye Sander vitreus populations Laurentian Great Lakes, we used acoustic telemetry combined with Cormack–Jolly–Seber capture–recapture models estimate site and apparent annual survival for Tittabawassee River Lake Huron Maumee Erie. Walleye condition were tagged from Erie 2011–2012. Site estimated return...
Natural resource governance is inherently complex owing to the socio-ecological systems in which it embedded. Working arrangements have been fundamentally transformed throughout COVID-19 pandemic with potential negative impacts on trust-based social networks foundational management and transboundary governance. To inform development of a post-pandemic new-normal management, we examined trust relationships using Laurentian Great Lakes North America as case study. 82.9% (n = 97/117) fishery...
We studied the main channel of lower Illinois River and Mississippi just upstream downstream its confluence with to describe abundance, composition, and/or seasonal appearance components main-channel community. Abundance fishes in was high, especially adults. Most adult were present for either 3 or 4 seasons/y, indicating that regularly reside channel. documented abundant zooplankton benthic invertebrates channel, presence these food types diets catfish freshwater drum. All trophic levels...
Most freshwater fishes have short pelagic early life stages. Lake Michigan presents an interesting scenario for yellow perch (Perca flavescens), a species with long larval stage that may not be well adapted to lakes expansive environment and extensive offshore transport. We investigated the possibility stages of were transported from their nearshore spawning grounds explored whether food resources more or less favorable offshore. To determine extent which age-0 moved offshore, we sampled at...
The ontogeny of piscivory is an important process during the early life history many fishes, and why ontogenetic patterns closely related species vary unclear. We experimentally evaluated importance several factors that can determine switch to in two predators with different dietary ontogenies: walleye (Sander vitreus), a specialist piscivore, yellow perch (Perca flavescens), generalist. conducted growth prey selection experiments across sizes both using fish, zooplankton, benthic...
Carbon and nitrogen stable isotopes (δ 13 C δ 15 N, respectively) were measured for locally abundant primary producers, detritus, aquatic invertebrates, fish in backwater lakes of two large floodplain rivers an effort to understand patterns energy dependence trophic structure within these habitats. We observed enrichment values N that the ranges other systems but often considerably lower than 3.4 typically assumed isotope studies. Production based on benthic terrestrial material, combined...