Andrew H. Fayram

• PhD Biological Sciences (Fisheries and Statistics)
• Source Water Monitoring Coordinator at Loveland Water and Power

Key Takeaways Source water quality monitoring programs benefit from sampling efforts that address data needs on different spatial and temporal scales. The cost of monitoring programs is more than offset by real savings, avoided costs, and increased support for decision makers. Loveland Water and Power has derived diverse and sometimes unexpected be...

Urbanization and elevated selenium can negatively affect aquatic macroinvertebrate communities. These factors are often highly correlated in streams along the Front Range of the Rocky Mountains, USA. Understanding which factor is the primary driver of macroinvertebrate community health would aid in the development of appropriate management actions...

Measures of aquatic macroinvertebrate communities are often used to characterize water quality and indicate whether waterbodies are meeting management expectations. The accuracy of these measures depends on the skill and experience of the person identifying the macroinvertebrates, and obtaining these measures can be relatively expensive due to the...

Bark beetle outbreaks in the Rocky Mountains caused substantial tree mortality starting in the late 1990s, and continued into the 2000s, with the most severe mortality occurring from 2002 to 2012. Over the same time period, concentrations of dissolved copper in the Big Thompson River (BTR), Colorado, USA, increased significantly and are high enough...

A gap between research and management exists in numerous natural resource fields. This can lead to management actions that are based on experience rather than evidence and may be less effective as a result. The gap may be partly attributable to research not being relevant, timely or accessible for managers. Editorial boards of peer-reviewed journal...

Smallmouth Bass (Micropterus dolomieu) is an important sportfish and has been suggested as a restoration target species in degraded aquatic environments such as “Areas of Concern” in the Great Lakes basin. Determining expected relative densities of fish and wildlife populations, such as Smallmouth Bass, in least-impacted situations is central to de...

Walleye (Sander vitreus) populations in Wisconsin are near the center of their geographical range and support valuable fisheries. The role of seasonal temperature and precipitation in Walleye recruitment was examined using regression tree analysis. Climatological variables were estimated at the 8 km2 scale and Walleye recruitment was estimated base...

The Lower Menominee River area of concern (AOC) is one of 43 such areas in the Great Lakes region that have been subject to historical degradation and recent remediation activities. An evaluation of the efficacy of the remediation activities relates directly to the assessment of various beneficial use impairments (BUIs) and their associated targets...

Understanding the dynamics of angling effort and how fish populations are affected by angler effort is an important and often unappreciated component of fisheries management. Our objective was to determine the extent to which angling-induced mortality limits walleye Sander vitreus population density in northern Wisconsin lakes. We developed a simul...

Walleyes Sander vitreus are an important cultural and economic resource in northern Wisconsin, both as a recreational fishery and a tribal subsistence fishery. Understanding the recruitment of age‐0 walleyes to the adult population could be of great utility in effectively managing harvest and informing stocking efforts in this mixed‐use fishery. Ou...

Understanding the dynamics of angling effort and how fish populations are affected by angler effort is an important and often unappreciated component of fisheries management. Our objective was to determine the extent to which angling-induced mortality limits walleye Sander vitreus population density in northern Wisconsin lakes. We developed a simul...

To evaluate the dynamics of fishing and natural mortality, we used a catch–age cohort analysis model of the population dynamics of walleye Sander vitreus in Escanaba Lake, Wisconsin, during 1956–2009. The catch–age model was based on angling catches at age from a compulsory creel census, abundance at age from mark–recapture studies, and recruitment...

Recreational fishing in the United States is generally open access, so harvest is primarily determined by the amount of angler effort. Effort is dynamic and can depend on catch rates, fish density, and other factors. Our objective was to determine whether recreational angler effort limits walleye (Sander vitreus) population densities and what densi...

Trout density and biotic integrity scores are central metrics used to guide trout stream management actions. However, it is unclear whether reach-scale habitat characteristics affect trout density and biotic integrity in a similar fashion. To determine the relative strength of relationships between reach-scale habitat characteristics and important...

The Conservation Reserve Program (CRP) is a federal program that encourages the planting of cool- or warm-season grass cover on highly erodible croplands and along stream corridors. We sought to determine whether fish community structure in coldwater streams was associated with CRP and other agricultural land use changes in southwestern Wisconsin....

Given the increasing competition for marine resources, regulatory strategies that benefit multiple stakeholders are increasingly important. Offshore wind power generating facilities are becoming more common in the marine environment and alter the characteristics of the fisheries in the surrounding area. Floating wind turbines can act as fish aggreg...

Native brook trout Salvelinus fontinalis and introduced brown trout Salmo trutta support important recreational fisheries in Wisconsin, and coldwater index of biotic integrity (IBI) scores are often used to determine the quality of stream environments for these trout. To successfully manage biotic communities and fish populations, it is important t...

Abstract  Proper interpretation of measures used to describe fish populations requires knowledge of the measure's inherent spatial and temporal variation. Proportional stock density (PSD), the ratio of ‘quality-length’ fish to ‘stock-length’ fish multiplied by 100, is commonly used as a measure of population size structure; PSD values range from 0...

We constructed mass-balance models in two lakes to measure changes in community maturity associated with walleye stocking. Community maturity is related to stability. Stability, in terms of a particular community structure and total biomass, is a desirable characteristic. It is important to understand how management actions, such as fish stocking a...

We evaluated a modified daily bag limit for walleyes Sander vitreus to determine whether management goals were achieved. The modified bag limit consisted of no minimum length limit but allowed a daily harvest of only one walleye longer than 356 mm. The Wisconsin Department of Natural Resources implemented the single-fish, 356-mm regulation in 1997...

We compared relationships between angler effort and population densities of four species of fish in lakes with stocked and self-sustaining walleye populations in Wisconsin to determine the effect of walleye stocking on angler effort. The origin of walleye populations affected angler effort directed at walleyes in lakes with a daily bag limit of two...

We propose that stock–recruitment models can be used to estimate optimal stocking rates. Data to estimate the optimal stocking rates can be obtained in a relatively short amount of time by sampling similar populations over a few years. Whether the goal of stocking is endangered species recovery or supplementation of recreational fisheries, accurate...

We used a number of different data sets and four criteria to evaluate evidence of competition and predation between walleye Sander vitreus and northern pike Esox lucius, muskellunge E. masquinongy, smallmouth bass Micropterus dolomieu, and largemouth bass M. salmoides in northern Wisconsin lakes. The four criteria were as follows: (1) indices of po...

Most indices of biotic integrity (IBIs) are designed to represent the biological condition of individual sampling locations in a river or stream. Characterizing the biological condition of an entire stream is often of interest and requires data from multiple sites. The representativeness of these data depends on the variability in the scores betwee...

We assessed density-related changes in growth of walleye Sander vitreus in the ceded territory of northern Wisconsin from 1977 to 1999. We used asymptotic length (L∞), growth rate near t0 (ω), and body condition as measures of walleye growth to determine the relationship between growth and density. Among lakes, there was weak evidence of density-de...

Voluntary release of fish can play an important role in the management of recreational fisheries. I investigated how the release rate, defined as the proportion of all fish caught that are released, may be affected by minimum length regulations and changes in angler behavior over time for walleye Stizostedion vitreum and muskellunge Esox masquinong...

Voluntary release of fish can play an important role in the management of recreational fisheries. I investigated how the release rate, defined as the proportion of all fish caught that are released, may be affected by minimum length regulations and changes in angler behavior over time for walleye Stizostedion vitreum and muskellunge Esox masquinong...

In 1990 the Wisconsin Department of Natural Resources implemented a 15-in (1 in = 2.56 cm) minimum length limit for walleyes Stizostedion vitreum on waters throughout the state, excluding some lakes where walleyes demonstrated slow growth or high mercury contamination. To determine if management goals for the regulation had been met, we examined th...

In 1990 the Wisconsin Department of Natural Resources implemented a 15-in (1 in = 2.56 cm) minimum length limit for walleyes Stizostedion vitreum on waters throughout the state, excluding some lakes where walleyes demonstrated slow growth or high mercury contamination. To determine if management goals for the regulation had been met, we examined th...

We compared the relative efficiency of day snorkeling, night snorkeling, and multiple-removal electrofishing at estimating abundance of juvenile coho salmon Oncorhynchus kisutch and trout Oncorhynchus spp. during winter in four small western Washington streams. Salmonid abundance was estimated within 32 individual habitats at low to moderate winter...

In the Lake Washington basin, run sizes of sockeye salmon Oncorhynchus nerka and other anadromous salmon species declined during the 1980s. Reduced survival of juvenile sockeye salmon in the lake suggested that increased predation may have contributed to the decreased run size. Introduced smallmouth bass Micropterus dolomieu were considered to be a...

In the Lake Washington basin, run sizes of sockeye salmon Oncorhynchus nerka and other anadromous salmon species declined during the 1980s. Reduced survival of juvenile sockeye salmon in the lake suggested that increased predation may have contributed to the decreased run size. Introduced smallmouth bass Micropterus dolomieu were considered to be a...

ABSTRACT WALLEYE STOCKING IN WISCONSIN LAKES: SPECIES INTERACTIONS, CHANGES IN ANGLER EFFORT, OPTIMAL STOCKING RATES, AND EFFECTS ON COMMUNITY MATURITY

Thesis (M.S.)--University of Washington, 1996. Includes bibliographical references (leaves [68]-76).