A5084101223- Fish Ecology and Management Studies
- Marine and fisheries research
- Crustacean biology and ecology
- Aquatic Invertebrate Ecology and Behavior
- Isotope Analysis in Ecology
- Coral and Marine Ecosystems Studies
- Fish Biology and Ecology Studies
- Hydrology and Sediment Transport Processes
- Marine Biology and Ecology Research
- Aquatic Ecosystems and Phytoplankton Dynamics
- Hydrology and Watershed Management Studies
- Transboundary Water Resource Management
- Agricultural Innovations and Practices
- Freshwater macroinvertebrate diversity and ecology
- Aquatic Ecosystems and Biodiversity
- Environmental DNA in Biodiversity Studies
- Wildlife Ecology and Conservation
- Ecology and biodiversity studies
- Problem and Project Based Learning
- RFID technology advancements
- Engineering Education and Curriculum Development
- Parasite Biology and Host Interactions
- Dam Engineering and Safety
- Mollusks and Parasites Studies
- Hybrid Renewable Energy Systems
Michigan State University
2013-2024
Michigan Department of Natural Resources
2009-2023
Walla Walla University
2014-2019
University of Wisconsin–Madison
2004-2013
Louisiana State University
2006-2008
ABSTRACT Invasive Asian Carp are threatening to enter Lake Michigan through the Chicago Area Waterway System, with potentially serious consequences for Great Lakes food webs. Alongside efforts keep these fishes from entering electric barriers, state of Illinois initiated a fishing program aimed at reducing their densities intensive commercial exploitation on River. In this study, we explore prospects “collapse” in River fishing. Based meta‐analysis demographic data, developed dynamic...
Controlling invasive species can restore ecosystems while also quantifying interaction strengths. We experimentally removed rusty crayfish (Orconectes rusticus) from a Wisconsin lake. Rusty abundance declined by 99% in 8 years and did not significantly increase 4 postharvest, with no compensatory recruitment response observed. Native virilis) sunfish (Lepomis spp.) abundances increased two orders of magnitude as declined, macrophyte cover 2–4 m waters. expected benthic macroinvertebrate...
Improved methods are needed for the prevention and control of invasive species. We investigated potential to a rusty crayfish (Orconectes rusticus) population in an isolated lake northern Wisconsin by trapping adult restricting fishing, thereby increasing fish populations predation on small crayfish. Over 3 year period, traps predatory fishes removed substantial portions population. used age-structured model determine which removal method had largest effect growth rates. Because more were...
We assessed population dynamics of walleye (Sander vitreus) in multiple Ceded Territory lakes, which support recreational and tribal fisheries, using a hierarchical Bayesian age-structured model. used distributions parameter estimates to develop dynamic simulation model forecast performances fisheries across these lakes under alternative fishing scenarios. Application approach allowed us obtain more accurate stock–recruitment relationships, natural mortality, maturity selectivity schedules,...
Crayfish often dominate freshwater ecosystems and can have strong effects on littoral habitat biota through foraging. However, there is substantial debate regarding the trophic role of crayfish implications their foraging behavior ecosystems. We created a bioenergetics model for rusty (Orconectes rusticus) to determine how growth prey choice constrain consumption, which affects simulated over 6400 potential diets by varying abundance important prey. judged amount identity that must consume...
Rainbow smelt (Osmerus mordax) are invaders of inland lakes in the Laurentian Great Lakes region North America and have negatively affected native fish populations. Walleye (Sander vitreus) comprise an important fishery throughout could be by rainbow invasions. We test for declines young-of-the-year walleye (YOY-W) density 12 26 known invaded Wisconsin. Invaded showed significantly lower YOY-W densities than uninvaded during period 1985–2004. In 94% (17/18) years, from were those lakes....
The landscape theory of food web architecture (LTFWA) describes relationships among body size, trophic position, mobility, and energy channels that serve to couple heterogenous habitats, which in turn promotes long-term system stability. However, empirical tests the LTFWA are rare support differs terrestrial, freshwater, marine systems. Further, it is unclear whether applies highly altered ecosystems dominated by introduced species such as Laurentian Great Lakes. Here, we provide an test...
[Selective predation can drive community composition. We designed a field study to determine if selective by fishes accounts for population dominance of the exotic rusty crayfish, Orconectes rusticus , in northern Wisconsin lake. hypothesized that fish predators avoid consuming O. favor congeners propinquus and virilis because attains either superior size or is more aggressive than its congeners. Largely based on previous experimental work, we expected would consume smaller individuals...
Abstract Understanding where, when, and how native species persist in the face of invasive species‐driven ecosystem change is critical for management conservation. In some cases, ecological interactions among are spatially structured, spatial segregation can be a key coexistence mechanism ecologically similar taxa. We evaluated 19‐years explicit crayfish community data from long‐term whole‐lake experiment, which includes 8 years rusty ( Faxonius rusticus ) removal followed by 11 post‐removal...
Tetzlaff JC, Roth BM, Weidel BC, Kitchell JF. Predation by native sunfishes ( Centrarchidae ) on the invasive crayfish Orconectes rusticus in four northern Wisconsin lakes. Ecology of Freshwater Fish 2011: 20: 133–143. © 2010 John Wiley & Sons A/S Abstract – Introduced rusty often establish abundant populations lakes where they negatively impact food webs. However, do not become all predation has been posed as one potential mechanism limiting density, but there is limited empirical...
A process‐based simulation model was used to examine the nature and intensity of food‐web interactions that allow Osmerus mordax dominate invaded lakes. The simulates among linked populations O. , Coregonus artedi Sander vitreus . Simulations indicated where: (1) adult prey on young‐of‐the‐year (YOY) C. (2) YOY negatively affect S. through competition (3) experience moderate fishing mortality. dominated simulations across a broad range variable values regulated predation, displayed threshold...
Climate-driven shifts in the natural flow regime can threaten species persistence stream systems, and anticipating such before they occur is critical for conservation. We explore how climate change may impact biota by examining systems that differ terms of yet are similar other landscape features as geology, size, elevation. Across an established precipitation hydrologic gradient on east coast Hawaii Island, we sampled habitat populations endemic migratory mountain shrimp Atyoida bisulcata...
Abstract Boswell, K. M., Roth, B. and Cowan, Jr J. H. 2009. Simulating the effects of side-aspect fish orientation on acoustic biomass estimates. – ICES Journal Marine Science, 66: 1398–1403. Simulation methods were used to investigate effect estimates derived from data. Three population-level length distributions (n = 1000 individuals) simulated (identical, uniform, age class) applied a target strength (TS) function previously for Gulf menhaden (Brevoortia patronus). Systematic manipulation...
Abstract The Laurentian Great Lakes are a source of nonnative species for smaller inland lakes throughout the region; however, foraging ecology predators in systems invaded by has not been well studied. We used diet and stable isotope analyses to describe contributions native forage diets Walleyes Sander vitreus within an lake chain multiple species. Our hypothesis was that Walleyes' would be associated with relative amount prey available littoral or offshore–pelagic habitats ultimately...