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Fish & Wildlife News: Winter 2017, Matt Trott

Fish and Wildlife News

No abstract provided.

An Evaluation Of The Use Of Pentosidine As A Biomarker For Ageing Turtles, John B. Iverson, Randal S. Stahl, Carol Furcolow, Fred Kraus

United States Department of Agriculture Wildlife Services: Staff Publications

Concentrations of the biomarker pentosidine have been shown to be useful measures of age for a number of avian and mammalian species. However, no study has examined its usefulness as an age marker in a long-lived ectotherm despite the fact that such a marker could prove useful in understanding age distributions of populations subject to conservation programmes. Therefore, we evaluated pentosidine concentrations in the interdigital webbing of 117 female yellow mud turtles (Kinosternon flavescens) at a 35 year study site in western Nebraska where nearly all turtles are of known age. Pentosidine concentrations were extraordinarily low and positively …

Differential Impacts Of Wildfire On The Population Dynamics Of An Old-Forest Species, Jeremy T. Rockweit, Alan B. Franklin, Peter C. Carlson

United States Department of Agriculture Wildlife Services: Staff Publications

Ecological disturbances shape and maintain natural communities, but climate change and human land use can alter disturbance regimes and affect population persistence and vital rates in unpredictable ways. Species inhabiting landscapes shaped by wildfire have evolved mechanisms allowing them to persist under this dynamic disturbance type, which creates habitats of varying quality for these species. We utilized data from a 26-yr demographic study of northern spotted owls to analyze the influence of wildfire on apparent survival and recruitment rates. Wildfires occurred across different years and affected different spotted owl territories, which allowed us to implement a retrospective Before-After-Control-Impact (BACI) analysis …

Quantile Regression Of Microgeographic Variation In Population Characteristics Of An Invasive Vertebrate Predator, Shane R. Siers, Julie A. Savidge, Robert N. Reed

United States Department of Agriculture Wildlife Services: Staff Publications

Localized ecological conditions have the potential to induce variation in population characteristics such as size distributions and body conditions. The ability to generalize the influence of ecological characteristics on such population traits may be particularly meaningful when those traits influence prospects for successful management interventions. To characterize variability in invasive Brown Treesnake population attributes within and among habitat types, we conducted systematic and seasonally-balanced surveys, collecting 100 snakes from each of 18 sites: three replicates within each of six major habitat types comprising 95% of Guam's geographic expanse. Our study constitutes one of the most comprehensive and controlled samplings of …

Bayesian Model-Based Age Classification Using Small Mammal Body Mass And Capture Dates, Nathaneal Lichti, Kenneth F. Kellner, Timothy J. Smyser, Scott A. Johnson

United States Department of Agriculture Wildlife Services: Staff Publications

Accurate age determination is a fundamental prerequisite for demographic studies as well as population monitoring efforts that provide information for management and conservation. Yet, common age determination methods suffer from low accuracy rates, impose additional handling and time costs on animals and biologists, or rely on invasive techniques such as tooth extraction. We introduce an alternative, mixture modeling approach for age determination that exploits mammalian growth patterns to classify newly encountered animals as juveniles or adults, and present an example analysis that classifies Allegheny woodrats based solely on their capture dates and mass at capture, in combination with data from …

Latino Men In Two-Year Public Colleges: State-Level Enrollment Changes And Equity Trends Over The Last Decade, Deryl K. Hatch, Crystal E. Garcia, Victor B. Sáenz

Department of Educational Administration: Faculty Publications

Latino males continue to lag behind their peers in college enrollment and attainment, even as evidence suggests the 2-year public college sector in particular is making some strides to address this inequity. Yet there are few published figures of enrollment trends for Latino males in 2-year public colleges on a national or state-by-state basis to provide context that might informs local policy and practice. Using the most recent available data from IPEDS and the U.S. Census Bureau’s Community Population Survey, this study establishes trends over roughly the last decade in enrollment numbers and, through the use of equity indices, gains …

Demography Of Honors: The National Landscape Of Honors Education, Richard Ira Scott, Patricia J. Smith

Journal of the National Collegiate Honors Council Online Archive

As the National Collegiate Honors Council (NCHC) celebrates its fiftieth year, the organization has an excellent opportunity to reflect on how honors education has spread during its history. Tracking growth in the number of institutions delivering honors education outside of its membership has not been a priority for NCHC or for researchers in honors education. Most information has been anecdotal, and when researchers have mounted surveys, the results are frequently non-comprehensive, based on convenience sampling. We propose a demography of honors to fill the lacuna with systemic, reliable information.

Demographic studies describe the size, structure, and distribution of human populations, …

From Orientation Needs To Developmental Realities: The Honors First-Year Seminar In A National Context, Anton Vander Zee, Trisha Folds-Bennett, Elizabeth Meyer-Bernstein, Brendan Reardon

Journal of the National Collegiate Honors Council Online Archive

The transition into college remains one of the most formative and complex phases in an individual’s life. Institutions of higher learning have responded to the challenges facing first-year students in myriad ways, most often by offering summer orientation programs, dynamic living-learning environments, tailored academic and psychological support services, and dedicated first-year seminars (FYSs) that seek to engage students in a range of curricular and co-curricular experiences. FYSs—courses intended to enhance the academic skills and/or social development of first-year college students—have become the curricular anchors grounding this broad array of programming. While addressing the developmental needs of first-year students is the …

Demography Of Honors: Comparing Nchc Members And Non-Members, Patricia J. Smith, Richard I. Scott

Journal of the National Collegiate Honors Council Online Archive

Recent research describing the landscape of honors education has demonstrated that honors programs and colleges have become an important and expanding component of American higher education. Since its inception nearly a century ago, collegiate honors education offering campus-wide curricula has spread to more than 1,500 non-profit colleges and universities (Scott and Smith, “Demography”). NCHC has served as the umbrella organization for the collegiate honors community during a fifty-year period in which the number of known programs delivering honors education has experienced a more than four-fold increase (Rinehart; Scott and Smith, “Demography”).

In 2012, NCHC undertook systematic research of its member …

Variation Within The “New Latino Diaspora”: A Decade Of Changes Across The United States In The Equitable Participation Of Latina/Os In Higher Education, Deryl K. Hatch, Naomi Mardock Uman, Crystal E. Garcia

Department of Educational Administration: Faculty Publications

This study problematizes the common discourse that rapid and widespread Latina/o demographic growth in the United States is a driving force in realizing higher education equity gains. Using equity indices for students, faculty, and administrative leaders at the state level, we present a portrait of changes in Latina/o participation in higher education over the last decade and propose a classification scheme for understanding variation across states at the intersection of changes in both demographics and equitable participation.

En este estudio se problematiza el discurso común del veloz y extendido crecimiento demográfico latino en los Estados Unidos como promotor de mayor …

The Effects Of Habitat, Climate, And Barred Owls On Long-Term Demography Of Northern Spotted Owls, Katie M. Dugger, Eric D. Forsman, Alan B. Franklin, Raymond J. Davis, Gary C. White, Carl J. Schwarz, Kenneth P. Burnham, James D. Nichols, James E. Hines, Charles B. Yackulic, Paul F. Doherty Jr., Larissa Bailey, Darren A. Clark, Steven H. Ackers, Lawrence S. Andrews, Benjamin Augustine, Brian L. Biswell, Jennifer Blakesley, Peter C. Carlson, Matthew J. Clement, Lowell V. Diller, Elizabeth M. Glenn, Adam Green, Scott A. Gremel, Dale R. Herter, J. Mark Higley, Jeremy Hobson, Rob B. Horn, Kathryn P. Huyvaert, Christopher Mccafferty, Trent Mcdonald, Kevin Mcdonnell, Gail S. Olson, Janice A. Reid, Jeremy Rockweit, Viviana Ruiz, Jessica Saenz, Stan G. Sovern

United States Department of Agriculture Wildlife Services: Staff Publications

Estimates of species’ vital rates and an understanding of the factors affecting those parameters over time and space can provide crucial information for management and conservation. We used mark–recapture, reproductive output, and territory occupancy data collected during 1985–2013 to evaluate population processes of Northern Spotted Owls (Strix occidentalis caurina) in 11 study areas in Washington, Oregon, and northern California, USA. We estimated apparent survival, fecundity, recruitment, rate of population change, and local extinction and colonization rates, and investigated relationships between these parameters and the amount of suitable habitat, local and regional variation in meteorological conditions, and competition with …

Ecosystem Services Provided By Avian Scavengers, Travis L. Devault, James C. Beasley, Zachary H. Olson, Marcos Moleón, Martina Carrete, Antoni Margalida, José Antonio Sánchez-Zapata

United States Department of Agriculture Wildlife Services: Staff Publications

Food webs developed under classical theoretical models often depict simplistic interactions among trophic levels linked by predation (Hairston et al. 1960). As a result, extensive research efforts have been devoted to studying predator-prey interactions, often ignoring the contribution of scavenging in food-web dynamics. However, recent advancements in food-web theory have recognized the widespread and critical role that scavenging plays in stabilizing food webs in ecosystems throughout the world, thus suggesting that previous models may have greatly underestimated the importance of scavenging in food web research ( Wilson and Wolkovich 2011; Barton et al. 2013). Such disregard for the importance of …

Reconciling Lgb And Christian Identities In The Rural South, Brandi Woodell, Emily Kazyak, D'Lane Compton

Department of Sociology: Faculty Publications

Drawing on in-depth interviews with rural Christians living in the South who identify as lesbian, gay, and bisexual (LGB), this study analyzes how they negotiate their religious, geographic, and sexual identities. We find that most interviewees employed two strategies to reconcile their Christian and gay identities: emphasizing a personal connection to an accepting God and finding a local church in their rural community in which they felt accepted. We argue that rural contexts influenced interviewees’ reliance on these strategies and show how individuals can construct multiple interpretations about themselves, which do not always align with existing cultural assumptions. In addition, …

Industrial Facilities, Public Parks And Community Composition: Examining Environmental Justice In Lincoln, Nebraska, Brynn Stewart

Department of Environmental Studies: Undergraduate Student Theses

Environmental injustice involves the discrimination of low-income or minority populations in regards to environmental conditions in comparison to society at large. This study uses the net-environmental equity concept to analyze the state of environmental justice in the city of Lincoln, Nebraska. To what extent are Lincoln’s environmental burdens located around low-income/minority residents? To what extent are Lincoln’s environmental benefits located away from low-income/minority residents? To what extent do Lincoln’s policies promote environmental justice? A distributional analysis of Lincoln’s public park system and toxic releasing industries is completed along with a policy review. Lincoln’s policies and environmental conditions of minority residents …

Factors Affecting Female Space Use In Ten Populations Of Prairie Chickens, Virginia L. Winder, Kaylan M. Carrlson, Andrew J. Gregory, Christian A. Hagen, David A. Haukos, Dylan C. Kesler, Lena C. Larsson, Ty W. Matthews, Lance B. Mcnew, Michael A. Patten, Jim C. Pitman, Larkin A. Powell, Jennifer A. Smith, Tom Thompson, Donald H. Wolfe, Brett K. Sandercock

School of Natural Resources: Faculty Publications

Conservation of wildlife depends on an understanding of the interactions between animal

movements and key landscape factors. Habitat requirements of wide-ranging species often vary spatially,

but quantitative assessment of variation among replicated studies at multiple sites is rare. We investigated

patterns of space use for 10 populations of two closely related species of prairie grouse: Greater Prairie-

Chickens (Tympanuchus cupido) and Lesser Prairie-Chickens (T. pallidicinctus). Prairie chickens require large,

intact tracts of native grasslands, and are umbrella species for conservation of prairie ecosystems in North

America. We used resource utilization functions to investigate space use by female prairie chickens during …

Evaluating Birding Tourism Markets In Nebraska, Joel G. Jorgensen, Mary Bomberger Brown, Lauren R. Dinan

Nebraska Game and Parks Commission: Staff Research Publications

In recent years, the number of non-consumptive (non-hunting, non-fishing) wildlife recreationists and their economic impact have increased in the United States. In 1996, surveys indicated there were more wildlife watchers than hunters and anglers combined (U.S. Fish and Wildlife Service and U.S. Department of Commerce 1997). According to the National Survey of Fishing, Hunting, and Wildlife-Associated Recreation commissioned by the U.S. Fish and Wildlife Service, there were over 48 million birdwatchers age 16 or older in the United States in 2006 (Carver 2009), which was approximately 21 percent of the U.S. population at the time of the survey (La Rouch …

Is Anthropogenic Cougar Mortality Compensated By Changes In Natural Mortality In Utah? Insight From Long-Term Studies, Michael L. Wolfe, David N. Koons, David C. Stoner, Patricia Terletzky, Eric M. Gese, David M. Choate, Lise M. Aubry

United States Department of Agriculture Wildlife Services: Staff Publications

Understanding the interplay between exploitation and natural mortality is essential to guiding sustainable conservation of wildlife. Exploitation of carnivores by humans has long been thought to result in compensatory reductions of natural mortality among survivors. If rates of human exploitation exceed natural mortality, however, such actions will ‘add’ to overall mortality and could imperil the sustainability of such actions. We applied competing risk analyses to >/= 16 years of data for heavily harvested and semi-protected cougar populations in Utah to test the additive and compensatory mortality hypotheses, while accounting for parameter uncertainty. We additionally tested for presence of the two …

Is Anthropogenic Cougar Mortality Compensated By Changes In Natural Mortality In Utah? Insight From Long-Term Studies, Michael L. Wolfe, David N. Koons, David C. Stoner, Patricia Terletzky, Eric M. Gese, David M. Choate, Lise M. Aubry

United States Department of Agriculture Wildlife Services: Staff Publications

Understanding the interplay between exploitation and natural mortality is essential to guiding sustainable conservation of wildlife. Exploitation of carnivores by humans has long been thought to result in compensatory reductions of natural mortality among survivors. If rates of human exploitation exceed natural mortality, however, such actions will ‘add’ to overall mortality and could imperil the sustainability of such actions. We applied competing risk analyses to >16 years of data for heavily harvested and semi-protected cougar populations in Utah to test the additive and compensatory mortality hypotheses, while accounting for parameter uncertainty. We additionally tested for presence of the two primary …

The Impact Of Urbanicity On Student Engagement At Small, Residential, Liberal Arts Colleges, Todd Clark

Department of Educational Administration: Dissertations, Theses, and Student Research

This study analyzed the impact of urbanicity on student engagement at small, residential, liberal arts colleges. Data from the National Survey of Student Engagement (NSSE) were analyzed from 29 schools (14 rural and 15 urban) using five scalets developed by Pike (2006) and six demographic variables from the NSSE survey. This analysis determined how urbanicity impacts student engagement and which group of students is particularly affected from among the demographics studied. The effects of urbanicity were measured in three ways: aggregate student data, school level data, and within-school data. These analyses showed that urbanicity does significantly impact student engagement, though …

Variation In The Local Population Dynamics Of The Short-Lived Opuntia Macrorhiza (Cactaceae), Chirakkal V. Haridas, Kathleen H. Keeler, Brigitte Tenhumberg

School of Biological Sciences: Faculty Publications

Spatio-temporal variation in demographic rates can have profound effects for population persistence, especially for dispersal-limited species living in fragmented landscapes. Long-term studies of plants in such habitats help with understanding the impacts of fragmentation on population persistence but such studies are rare. In this work we reanalyzed demographic data from seven years of the short-lived cactus Opuntia macrorhiza var. macrorhiza at five plots in Boulder, Colorado. Previous work combining data from all years and all plots predicted a stable population (deterministic log λ ≈ 0). This approach assumed that all five plots were part of a single population. Since the …

Field-Readable Alphanumeric Flags Are Valuable Markers For Shorebirds: Use Of Double-Marking To Identify Cases Of Misidentification, Erin A. Roche, Colin M. Dovichin, Todd W. Arnold

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Implicit assumptions for most mark-recapture studies are that individuals do not lose their markers and all observed markers are correctly recorded. If these assumptions are violated, e.g., due to loss or extreme wear of markers, estimates of population size and vital rates will be biased. Double-marking experiments have been widely used to estimate rates of marker loss and adjust for associated bias, and we extended this approach to estimate rates of recording errors.We double-marked 309 Piping Plovers (Charadrius melodus) with unique combinations of color bands and alphanumeric flags and used multi-state mark recapture models to estimate the frequency …

Elucidating The Population Dynamics Of Japanese Knotweed Using Integral Projection Models, Joseph T. Dauer, Eelke Jongejans

School of Natural Resources: Faculty Publications

Plant demographic studies coupled with population modeling are crucial components of invasive plant management because they inform managers when in a plant’s life cycle it is most susceptible to control efforts. Providing land managers with appropriate data can be especially challenging when there is limited data on potentially important transitions that occur belowground. For 2 years, we monitored 4 clonal Japanese knotweed (Polygonum cuspidatum) infestations for emergence, survival, shoot height until leaf senescence, dry shoot biomass after senescence, and rhizome connections for 424 shoots. We developed an integral projection model using both final autumn shoot height and shoot …

Rcmdrplugin.Temis, A Graphical Integrated Text Mining Solution In R, Milan Bouchet-Valat, Gilles Bastin

The R Journal

We present the package RcmdrPlugin.temis, a graphical user interface for user-friendly text mining in R. Built as a plug-in to the R Commander provided by the Rcmdr package, it brings together several existing packages and provides new features streamlining the process of importing, managing and analyzing a corpus, in addition to saving results and plots to a report file. Beyond common-file formats, automated import of corpora from the Dow Jones Factiva content provider and Twitter is supported. Featured analyses include vocabulary and dissimilarity tables, terms frequencies, terms specific of levels of a variable, term co-occurrences, time series, correspondence analysis …

Small Geographic Range But Not Panmictic: How Forests Structure The Endangered Point Arena Mountain Beaver (Aplodontia Rufa Nigra), William J. Zielinski, Fredrick V. Schlexer, Sean A. Parks, Kristine L. Pilgrim, Michael K. Schwartz

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

The landscape genetics framework is typically applied to broad regions that occupy only small portions of a species’ range. Rarely is the entire range of a taxon the subject of study. We examined the landscape genetic structure of the endangered Point Arena mountain beaver (Aplodontia rufa nigra), whose isolated geographic range is found in a restricted (85 km²) but heterogenous region in California. Based on its diminutive range we may predict widespread gene flow and a relatively weak role for landscape variation in defining genetic structure. We used skin, bone, tissue and noninvasively collected hair samples …

The Social Bioarchaeology Of Childhood As Applied To The Analysis Of An Excavated Mid- To Late-Nineteenth-Century Mennonite Cemetery, Berne, Indiana, Jennifer L. Hildebrand

Department of Anthropology: Theses and Student Research

This thesis provides a social-bioarchaeological analysis of the Old Mennonite Cemetery (1852-1896) in Berne, Indiana, with emphasis on treatment of child burials as a reflection of Mennonite identity and beliefs. Social bioarchaeology combines the methods of both social archaeology and bioarchaeology. When applied to the study of children in a mortuary context, social bioarchaeology allows determination of cultural age categories and a fuller understanding of childhood. In this study, various forms of historical documentation were utilized to provide a social context for analysis of the cemetery. These materials revealed a collective religious identity based on practices pertaining to children, most …

An Analysis Of Final Course Grades In Two Different Entry Level Mathematics Courses Between And Among First Year College Students With Different Levels Of High School Mathematics Preparation, Carrie Muir

Department of Educational Administration: Dissertations, Theses, and Student Research

This study compared the performance of first year college students with similar high school mathematics backgrounds in two introductory level college mathematics courses, a College Algebra course and a Quantitative Reasoning (QR) course, and to compare the performance of students with differing high school mathematics backgrounds within each course. High school mathematics backgrounds were measures three ways: using the binary minimum preparation standards of the college, using levels defined by those standards and high school academic data, and levels defined only by high school academic data. Performance in college courses was considered in two ways: final grades and a binary …

Potential Influences Of Climate And Nest Structure On Spotted Owl Reproductive Success: A Biophysical Approach, Jeremy T. Rockweit, Alan B. Franklin, George S. Bakken, R. J. Gutierrez

United States Department of Agriculture Wildlife Services: Staff Publications

Many bird species do not make their own nests; therefore, selection of existing sites that provide adequate microclimates is critical. This is particularly true for owls in north temperate climates that often nest early in the year when inclement weather is common. Spotted owls use three main types of nest structures, each of which are structurally distinct and may provide varying levels of protection to the eggs or young. We tested the hypothesis that spotted owl nest configuration influences nest microclimate using both experimental and observational data. We used a wind tunnel to estimate the convective heat transfer coefficient ( …

Identification Of Source-Sink Dynamics In Mountain Lions Of The Great Basin, Alyson M. Andreasen, Kelley M. Stewart, William S. Longland, Jon P. Beckmann, Matthew L. Forister

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Natural and anthropogenic boundaries have been shown to affect population dynamics and population structure for many species with movement patterns at the landscape level. Understanding population boundaries and movement rates in the field for species that are cryptic and occur at low densities is often extremely difficult and logistically prohibitive; however genetic techniques may offer insights that have previously been unattainable. We analyzed thirteen microsatellite loci for 739 mountain lions (Puma concolor) using muscle tissue samples from individuals in the Great Basin throughout Nevada and the Sierra Nevada mountain range to test the hypothesis that heterogeneous hunting pressure …

Seed Production With Insect Herbivory And Fungal Occurrence For The Rare Penstemon Haydenii, Kay L Kottas, James Stubbendieck, Erin E. Blankenship, Jay B. Fitzgerald

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

We quantified seed production and viability, floral herbivory and fungal infection on blowout penstemon (Penstemon haydenii S. Watson), an endangered species of the Nebraska Sandhills, USA, in order to determine the potential for perpetuation of this, and possibly other short-lived, rare perennials of fragmented habitats. Over three years, the number of seeds per infructescence averaged 518 (SE 29.01). Plants produced an average of 1398 seeds. Seed viability of 38% reduced reproductive potential to 531 viable seeds per plant. Plants in multiple blowout sites in two counties were assigned to one of four treatments: insecticide, fungicide, both, or neither (control). …

Population Dynamics Of The Western Prickly Pear, Opuntia Macrorhiza (Cactaceae), Kathleen H. Keeler, Brigitte Tenhumberg

School of Biological Sciences: Faculty Publications

Although most cacti that have been studied are long lived, following individually marked plants in Boulder County, Colorado, for >7 years, we determined that average life span of Opuntia macrorhiza, the western prickly pear, is 3 years. A few individuals probably live >10 years. Vegetative reproduction, produced by rooting of cladodes, exceeded reproduction by germination and establishment from seeds. Both types of new recruits, from vegetative reproduction and seeds, had higher death rates than established plants. Size and frequency of flowering increased with age, although size both increased and decreased, sometimes dramatically, between years. Flowering correlated more strongly with …