A5042425654- Fish Ecology and Management Studies
- Marine and fisheries research
- Fish Biology and Ecology Studies
- Aquatic Invertebrate Ecology and Behavior
- Fish biology, ecology, and behavior
- Wildlife Ecology and Conservation
- Genetic diversity and population structure
- Hydrology and Sediment Transport Processes
- Aquatic Ecosystems and Phytoplankton Dynamics
- Identification and Quantification in Food
- Hydrology and Watershed Management Studies
- Avian ecology and behavior
- Genetic and phenotypic traits in livestock
- Ecology and biodiversity studies
- Water Quality and Resources Studies
- Marine Bivalve and Aquaculture Studies
- Recreation, Leisure, Wilderness Management
- Soil and Water Nutrient Dynamics
- Water Quality Monitoring Technologies
- Reproductive biology and impacts on aquatic species
- Underwater Acoustics Research
- demographic modeling and climate adaptation
- Coastal wetland ecosystem dynamics
- Microplastics and Plastic Pollution
- Insurance, Mortality, Demography, Risk Management
University of Wisconsin–Stevens Point
2016-2025
United States Geological Survey
2016-2025
Pacific Northwest National Laboratory
2023-2024
Hudson Institute
2024
Missouri Department of Conservation
2024
Alabama Department of Conservation and Natural Resources
2024
Texas Parks and Wildlife Department
2024
John Wiley & Sons (United States)
2024
Minnesota Department of Natural Resources
2007-2010
South Dakota State University
2002-2008
Abstract The Safe Operating Space ( SOS ) of a recreational fishery is the multidimensional region defined by levels harvest, angler effort, habitat, predation and other factors in which sustainable into future. boundaries exhibit trade‐offs such that decreases harvest can compensate to some degree for losses increases increasing value fishing time anglers. Conversely, high be sustained if habitat intact, low, effort moderate. approach recognizes limits several dimensions: at overly loss,...
Abstract Understanding the evolutionary impacts of harvest on fish populations is important for informing fisheries management and conservation has become a growing research topic over last decade. However, dynamics are highly complex, phenotypes can be influenced by many biotic abiotic factors. Therefore, it vital to collect robust data explore multiple alternative hypotheses before concluding that harvest. In their recently published manuscript, Bowles et al, Evolutionary Applications,...
Abstract Decision‐makers in inland fisheries management must balance ecologically and socially palatable objectives for ecosystem services within financial or physical constraints. Climate change has transformed the potential range of available. The Resist‐Accept‐Direct (RAD) framework offers a foundation responding to climate‐induced modification; however, trajectories current practices be understood improve future decisions. Using Wisconsin's diverse as case study, strategies recreational...
Abstract We provide a computer program (AGEKEY) that quickly implements an age–length key approach for estimating fish population age structure and mean lengths at age. The program's to assignment differs from previous approaches in ages are explicitly assigned individual unaged fish. Because is necessary describe the variation around estimates of catch per effort (CPE) compare these through standard statistical procedures, number specified captured each unit must be known or estimated....
We compared the removal and processing times required when scales, sagittal otoliths, dorsal spines were used as age estimation structures for 160 walleyes Stizostedion vitreum collected from six water bodies in South Dakota. Removal calculated by 10 fish groups. Dorsal least amount of time removal, followed scales otoliths. Whole-view otoliths no further manipulation prior to estimating age, while sectioning scale pressing 12.5 16.6 min additional time, respectively. also significantly more...
Abstract Estimating the time required (i.e., age) for fish in a population to reach specific length (e.g., legal harvest length) is useful understanding dynamics and simulating potential effects of length‐based regulations. The age at which reaches mean typically estimated by fitting von Bertalanffy growth function length‐at‐age data then rearranging best‐fit equation solve specified length. This process precludes use standard frequentist methods compute confidence intervals compare...
Abstract Over the last decade, abundance of Largemouth Bass Micropterus salmoides has increased in many northern Wisconsin lakes, causing concern among anglers and biologists regarding potential for to negatively affect populations Walleye Sander vitreus through predation or competition prey. Our objectives were determine whether (1) diet overlap occurred between adult Walleyes four lakes (2) use DNA barcoding reduce unidentifiable fish samples affected conclusions overlap. A single...
Abstract Implementing harvest regulations to eliminate or substantially reduce (≥90%) the exploitation of Walleyes Sander vitreus in recreational fisheries may increase population size structure, but these measures also could angler effort because many Walleye anglers are oriented. We analyzed data collected during 1995–2015 determine whether and fishery metrics Escanaba Lake, Wisconsin, changed after a minimum TL limit 71 cm with one‐fish daily bag was implemented 2003. This change...
Abstract Lake ecosystems are shifting due to many drivers including climate change and landscape‐scale habitat disturbance, diminishing their potential support some fisheries. Walleye Sander vitreus (Mitchill) populations, which recreational tribal fisheries across North America, have declined in lakes. Climate change, harvest, invasive species concurrent increases warm‐water fishes (e.g. Centrarchidae) may contributed declines. To test the utility of an intensive management action resist...
Abstract Harvest in walleye Sander vitreus fisheries is size‐selective and could influence phenotypic traits of spawners; however, contributions individual spawners to recruitment are unknown. We used parentage analyses using single nucleotide polymorphisms test whether parental were related the probability offspring survival Escanaba Lake, Wisconsin. From 2017 2020, 1339 adults 1138 juveniles genotyped 66% assigned at least one parent. Logistic regression indicated reproductive success...
Abstract We evaluated harvest patterns, exploitation, size selectivity, and angler catch preferences associated with winter fisheries for yellow perch Perca flavescens (i.e., ice fishing) on South Dakota lakes. Seasonal trends in the percentage of anglers targeting were apparent creel surveys seven lakes; varied among Exploitation was estimated two lakes through tag‐return studies. Nonreporting rates from surrogate postcards between groups (19–52%). On East 81 Slough, where relative stock...
Abstract We collected annual gill‐net samples of yellow perch Perca flavescens in six South Dakota lakes over 4–5 years. also simulated the effects reductions daily creel limits for (i.e., from 25 fish/angler to 5, 10, or 15 fish/angler) and use minimum total length (229 254 mm). Population indices varied widely among years within extent that any individual year were largely uninformative. Creel surveys indicated few anglers typically achieved a limit perch. Except Waubay Lake, lowering 5...
Abstract Objective Both electronic tags (e.g., acoustic and radio transmitters) conventional external are used to evaluate movement population dynamics of fish. External also sometimes facilitate the recovery internal or other instrumentation because healing can make it difficult identify fish with based on appearance alone. With both tag types, shedding failure affect accuracy precision study results. Methods We a decade (2011–2021) recapture data for Walleye Sander vitreus tagged in...
Dam construction contributes to declines in the distribution and abundance of many fishes. Increasing connectivity through adult transfer can be demographically genetically beneficial, but assessing effects resulting from difficult if resident fish exist upstream. Genotypes larval lake sturgeon ( Acipenser fulvescens) were used quantify contributions recruitment adults transferred upstream dams on Menominee River, USA. We evaluated whether timing, sex, size associated with odds reproduction....
In the Laurentian Great Lakes, application of acoustic telemetry to track fish movements has evolved into an important part multi-jurisdictional management. Nevertheless, barriers remain in translating research management or conservation actions. Here, we synthesize literature within Lakes basin explore factors that have contributed successes and failures integrating with needs decision-making processes. Collaboration between researchers managers, facilitated by consistent opportunities for...
Abstract Temporal patterns in length frequency distributions and hatch dates were described for larval yellow perch, Perca flavescens (Mitchill), captured surface ichthyoplankton trawls from late April to mid‐June 2000 2002 six South Dakota, USA lakes. Fewer than 15 perch collected four of lakes during 2002, suggesting that some cases factors prior to, or immediately after hatching likely play a critical role the recruitment process. When encountered larger numbers, temporal trends total...
Abstract Since the mid‐2000s, recruitment of Walleye Sander vitreus in some northern Wisconsin lakes has declined, potentially because climate‐induced changes lake environments. Yellow Perch Perca flavescens is also an ecologically and culturally important fish species this region, but mechanisms driving are unclear a lack targeted sampling. Previous studies have suggested that these two may be regulated by similar factors, observed declines cause for concern about recruitment. Our...
We used catch-at-age data from 122 populations of crappies Pomoxis spp. across the midwestern and southeastern United States to compare two methods for defining recruitment variability: (1) coefficient determination (RCD), calculated weighted linear regression loge(catch at age + 1) on age, (2) variability index (RVI). Ranked values RCD RVI were significantly correlated, which suggests that both indices measured in a similar manner. The categories agreed 52% time or within one category each...
Black crappies Pomoxis nigromaculatus and white P. annularis were sampled to index recruitment in seven Tennessee reservoirs (four main-stem three tributary storage impoundments). Crappie impoundments appeared be consistently higher years of high discharge during the prespawn period (1 January–31 March). A similar relation was found one impoundment; however, crappie two inversely related spawning April–30 May), little variation fourth impoundment. In general, reservoir hydrology have a...
Abstract Population and fishery responses to the implementation of minimum length limits (356 381 mm total length) for walleyes Sander vitreus were evaluated two Minnesota populations (Big Stone Lake Lac Qui Parle) compared with population trends observed in a single reference lake (Lake Traverse) between 1991 2004. High variation walleye recruitment (coefficient (CV = 100 × SD/mean) mean gill‐net catch per unit effort age‐2 > 98%) was all study also indices from 20 across North America...