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Articles 2161 - 2190 of 19673
Full-Text Articles in Entire DC Network
Cover, Editorial Staff, Journal Information
Cover, Editorial Staff, Journal Information
Human–Wildlife Interactions
This includes the cover caption, editorial staff, and journal information.
New Associate Editors, S. Nicole Frey
New Associate Editors, S. Nicole Frey
Human–Wildlife Interactions
New associate editors include Neil Jordan and Allen Rutberg.
Forthcoming Hwi Monographs
Human–Wildlife Interactions
The HWI Monograph Series is publishing an open access monograph on urban coyotes.
The Challenge Of Hpai And The Role Of Human–Wildlife Interactions Research, S. Nicole Frey
The Challenge Of Hpai And The Role Of Human–Wildlife Interactions Research, S. Nicole Frey
Human–Wildlife Interactions
This is the letter from the editor-in-chief of Volume 18, Issue 3.
Waterbird-Perceived Damage, Control Measures, And Economic Implications For Rice Production In The Brazilian Cerrado, Demetrio Luis Guadagnin, Alexandre Afonso Meyer, João Augusto Rossi Borges, Fernanda Maia Justo
Waterbird-Perceived Damage, Control Measures, And Economic Implications For Rice Production In The Brazilian Cerrado, Demetrio Luis Guadagnin, Alexandre Afonso Meyer, João Augusto Rossi Borges, Fernanda Maia Justo
Human–Wildlife Interactions
Waterbirds have the potential to inflict economic damage to crops. However, is rice (Oryza sativa) production in the Brazilian Cerrado significantly affected by waterbirds? This study aimed to assess the extent of waterbird damage on irrigated rice production in Central Brazil. We conducted surveys of waterbird populations in rice agroecosystem habitats throughout the cultivation cycle and analyzed the expenses associated with waterbird-induced yield losses and the control measures employed by farmers. The 2 most prevalent waterbird species observed were Dendrocygna viduatta and D. autumnalis, comprising 68.6% of all recorded waterbirds. These species were more frequently encountered and …
Flashtags: Evaluating A Novel Deterrent To Reduce Livestock Depredation, C. Aaron Bott, Stewart W. Breck, Tom W. Murphy, Brad A. Freking, Carlos A. López González, David Prause, Corey Peavey, Albert Sommers, Coke Landers, Julie K. Young
Flashtags: Evaluating A Novel Deterrent To Reduce Livestock Depredation, C. Aaron Bott, Stewart W. Breck, Tom W. Murphy, Brad A. Freking, Carlos A. López González, David Prause, Corey Peavey, Albert Sommers, Coke Landers, Julie K. Young
Human–Wildlife Interactions
Social tolerance of carnivores can be improved by preventing conflicts through nonlethal predator deterrents (e.g., livestock protection dogs [Canis lupus familiaris] and human presence) that have been used for centuries. However, many livestock producers feel the existing preventative methods are inadequate for extensive production systems where livestock can be spread widely and have less human supervision. To address this issue, we developed and tested a new nonlethal tool called FlashTags to reduce livestock predation. FlashTags are ear tags worn by livestock that flash a random-light pattern at night when motion-triggered. In the first year, we tested the devices …
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Variation In Mainland Northwest Territories Late-Winter Muskox (Ovibos Moschatus) Density Estimations And Habitat Associations Above And Below Treeline., Charlotte Rentmeister
Variation In Mainland Northwest Territories Late-Winter Muskox (Ovibos Moschatus) Density Estimations And Habitat Associations Above And Below Treeline., Charlotte Rentmeister
Theses and Dissertations (Comprehensive)
The Arctic and Sub-Arctic ecosystems are seeing accelerated changes in temperature, landcover, and consequently species abundance and distributions. Reliable distributions, and associated population density estimates, are essential for effective conservation and management efforts. Growing concerns from northern communities regarding the relationship between muskox and declining caribou populations strengthens the need for updated information on muskox populations within mainland Northwest Territories (NWT). The first objective for my research was to quantify and map updated winter estimates of abundance, density, and distribution of muskoxen within three recent survey regions located in mainland NWT, using a multiple covariate distance sampling method (MCDS), paired …
Assessing Road Dust Impacts On Macroinvertebrates Community Structure In Canadian Arctic Lakes, Hong Yi Gao
Assessing Road Dust Impacts On Macroinvertebrates Community Structure In Canadian Arctic Lakes, Hong Yi Gao
Theses and Dissertations (Comprehensive)
In the Canadian Arctic, unpaved gravel roads are essential for regional accessibility but are also potential sources of road dust runoff. My study investigated the impacts of road dust from the Dempster and Inuvik-Tuktoyaktuk Highways on adjacent freshwater ecosystems, focusing on water quality parameters and macroinvertebrate communities. Using a stratified random sampling design, 18 lakes were studied across two regions (boreal forest and tundra) and three distance categories from the road (0-300 m, 300-600 m, and > 600 m). Contrary to my initial hypotheses, findings revealed no significant differences in water quality or invertebrate communities relative to distance from the road. …
Walleye (Sander Vitreus) Do Not Exhibit An Aggregative Predatory Response To Larval White Sturgeon (Acipenser Transmontanus) In The Upper Columbia River In Lake Roosevelt, Washington, Seth A. Barr
EWU Masters Thesis Collection
Seasonal prey abundance can drive predatory fishes to aggregate in areas of high prey density. This project aimed to determine whether Walleye (Sander vitreus) exhibit an aggregative predation response to larval White Sturgeon (Acipenser transmontanus) drifts in the Lake Roosevelt system which is a reservoir of the Columbia River in Washington State. Populations of sturgeon are threatened worldwide, and are in need of conservation research. Walleye are a popular nonnative piscivorous game fish that were accidentally or illegally introduced to Lake Roosevelt in the 1950’s. Walleye in this study were obtained by gillnetting during White Sturgeon pre-spawn, peak spawn, and …
Endophytic Fungi Associated With Galls And Host Plants Of Asphondylia Borrichiae (Diptera: Cecidomyiidae), Shannon Lynn Sharpe
Endophytic Fungi Associated With Galls And Host Plants Of Asphondylia Borrichiae (Diptera: Cecidomyiidae), Shannon Lynn Sharpe
UNF Graduate Theses and Dissertations
Asphondylia borrichiae, like other gall-forming gnats, are obligate symbionts to the endophytic fungi (EF) they deposit when laying eggs. Asphondylia spp. and EF are important biocontrol agents, yet details surrounding their diversity, life cycles, and host interactions remain poorly understood. Galls and leaf-stem tissues from two host plants were surveyed to identify and compare EF diversity between the host tissues and species of A. borrichiae. Identification of 114 isolates was carried out by sequencing the internal transcribed spacer (ITS 1/4 primers). Pairwise alignments in multiple genetic databases were bolstered by phylogenetic analyses using maximum parsimony and maximum likelihood …
High-Quality Dietary Protein (Essential Amino Acids Matched To Reproductive Needs) Partially Breaks The Lifespan And Reproduction Trade-Off In Lubber Grasshoppers, Emma Kordek
UNF Graduate Theses and Dissertations
Finding interventions to break the trade-off between reproduction and lifespan can provide insight into physiological limitations of animals. Effects of dietary protein quality on the trade-off are currently unclear, but clarity could lead to better designed diets that match animal needs. Dietary amino acid blends matching yolk proteins support reproduction and extend lifespan in fruit flies. To test if this is conserved across species, we matched dietary amino acids to vitellogenin to test reproduction and lifespan in adult females of the lubber grasshopper. Specifically, we compared varying degrees of protein quality by manipulating dietary essential amino acids. We identified a …
Exploring The Welfare Of A Captive Population Of Cownose Rays (Rhinoptera Bonasus) Through Social And Resource Interactions, Kendal N. Rogers
Exploring The Welfare Of A Captive Population Of Cownose Rays (Rhinoptera Bonasus) Through Social And Resource Interactions, Kendal N. Rogers
UNF Graduate Theses and Dissertations
Zoos and aquariums utilize research-based management to ensure animals remain in a positive welfare standing. While vital, this research is taxa-biased towards mammals, with few studies observing other species that are frequently observed in captivity, such as elasmobranchs, or sharks and rays. Often maintained in exhibits that allow direct guest interaction, or touch pools, elasmobranchs have been shown to respond to these exposures through behavior changes in activity and social interactions. While this may indicate a potential for compromised welfare, the literature is conflicting and sparse, leaving uncertainty in the overall welfare condition of animals maintained in this popular exhibit …
Functional Investigation Of Shaggy, An Inhibitor Of Canonical Wnt Signaling, In The Tardigrade Hypsibius Exemplaris, Raul A. Chavarria
Functional Investigation Of Shaggy, An Inhibitor Of Canonical Wnt Signaling, In The Tardigrade Hypsibius Exemplaris, Raul A. Chavarria
UNF Graduate Theses and Dissertations
Tardigrades have a highly simplified anteroposterior (AP) axis. The mechanisms that regulate the development of this secondarily simplified AP axis are not known. In many animals, the canonical Wnt (cWnt) signaling pathway regulates primary axis establishment through antagonistic interactions with inhibitors of cWnt signaling. This study investigated the roles of shaggy, an inhibitor of cWnt signaling, in regulating development in the tardigrade Hypsibius exemplaris. Gene expression patterns of shaggy and other components of the cWnt signaling pathway were analyzed alongside markers of anterior and posterior identity using Hybridization Chain Reaction in situ in H. exemplaris. RNA interference …
Evaluating The Use Of Baited Remote Underwater Video (Bruv) In Assessing Shark And Fish Populations In A Low Visibility Estuarine System, The Tolomato River, Fl, Usa, Sarah Worthington
Evaluating The Use Of Baited Remote Underwater Video (Bruv) In Assessing Shark And Fish Populations In A Low Visibility Estuarine System, The Tolomato River, Fl, Usa, Sarah Worthington
UNF Graduate Theses and Dissertations
Recently, there has been increasing use of baited remote underwater video (BRUV) surveys for assessing shark and fish populations in marine ecosystems. This approach can be useful because it may provide a non-destructive, non-extractive, and cost-effective alternative to traditional fishing-based methods. However, to date, most studies using BRUVs have focused on their use in high-visibility ecosystems, such as tropical reefs. Furthermore, few studies have compared results from BRUV surveys with those obtained using traditional methods to evaluate the efficacy of this approach. Therefore, the goal of this study was to evaluate the effectiveness of using BRUV surveys to assess shark …
Biology And Ecology Of Neonectria Magnoliae And Neonectria Punicea, Two Understudied Neonectria Species In West Virginia, Hannah Marie Petronek
Biology And Ecology Of Neonectria Magnoliae And Neonectria Punicea, Two Understudied Neonectria Species In West Virginia, Hannah Marie Petronek
Graduate Theses, Dissertations, and Problem Reports (ETD)
The family Nectriaceae includes numerous phytopathogenic fungi that cause canker diseases on both angiosperm and conifer hosts worldwide. Numerous Neonectria spp. cause cankers on hardwoods and conifers in North America, but their roles in contributing to tree decline and mortality outside of beech bark disease are largely understudied. One such pathogen, Neonectria magnoliae, causes perennial cankers on two native hosts in central Appalachia: Fraser magnolia (Magnolia fraseri) and tulip-poplar (Liriodendron tulipifera). We also recently confirmed N. magnoliae from non-native star magnolia (Magnolia stellata) in West Virginia. Both native hosts occur in the central …
Investigating Changing Macronutrient Dynamics At A Plant, Microbe And Plant-Microbe Interactions Scale, Emel Kangi
Investigating Changing Macronutrient Dynamics At A Plant, Microbe And Plant-Microbe Interactions Scale, Emel Kangi
Graduate Theses, Dissertations, and Problem Reports (ETD)
Nutrient limitation drives forest ecosystem processes by altering net primary production, belowground (C) investments, and microbial activity. As such, the availability of essential macronutrients, such as nitrogen (N) and phosphorus (P), can severely impact plant growth, microbial decomposition, and the strength of plant-microbial interactions. However, our understanding of plant and microbe responses to changing nutrient availability, and the extent to which nutrient availability affects plant-microbe interactions, remains somewhat limited. Therefore, in this dissertation, I aimed to investigate nutrient limitation on a plant, microbe, and plant-microbe interaction level. First, to connect the phenotypic responses of nutrient-limited plants to key molecular mechanisms, …
A Balancing Act: Microrna Mediated Insect-Bacterial Homeostasis And The Tsetse Fly, Mason Hubbard Lee
A Balancing Act: Microrna Mediated Insect-Bacterial Homeostasis And The Tsetse Fly, Mason Hubbard Lee
Graduate Theses, Dissertations, and Problem Reports (ETD)
Microbial symbioses are ubiquitous across all kingdoms of life with broad and diverse impacts on the evolution of species. The sum of all microbes living in, on, or otherwise in close association with a host form the microbiota. In some cases, the development of a stable microbial association seems to have been necessary for the specialization of diet, as can be observed in numerous insect species, especially wood-eating, sap-feeding, and blood-feeding organisms. For the medically and economically tsetse fly (family Glossinidae), the mutualistic bacteria Wigglesworthia glossinidia is required for proper reproduction and supplementation of nutrients that the fly does not …
Exploring Long-Term Patterns: Black Bass Tournament Fishery And Population Trends In West Virginia's Navigable Rivers, Alex J. Benecke
Exploring Long-Term Patterns: Black Bass Tournament Fishery And Population Trends In West Virginia's Navigable Rivers, Alex J. Benecke
Graduate Theses, Dissertations, and Problem Reports (ETD)
Black bass Micropterus spp. are popular sport fish in West Virginia’s navigable rivers. In recent years, anglers have expressed concerns about a potential decline in fishery quality. To investigate these claims, we evaluated whether fishery quality has declined compared to earlier periods and whether population trends correspond to angler catch rates. Specifically, we aimed to (1) examine changes in species catch over time and during key periods, such as tournament and spawning seasons; (2) describe the distribution of black bass species across pools and habitat types; and (3) assess the outcomes of previous stocking efforts. To address these objectives, we …
Informing Standardized Wood Turtle (Glyptemys Insculpta) Population Monitoring: Influences Of Sampling Approach And Turtle Behavior On Model Estimation, Allyson N. Beard
Informing Standardized Wood Turtle (Glyptemys Insculpta) Population Monitoring: Influences Of Sampling Approach And Turtle Behavior On Model Estimation, Allyson N. Beard
Graduate Theses, Dissertations, and Problem Reports (ETD)
To better understand wood turtle (Glyptemys insculpta) population trends, two standardized population survey protocols were recently developed for use by state monitoring programs. The protocols were independently developed, tested, and deployed for population monitoring in the eastern and upper midwestern United States. It was unknown if the sampling designs result in similar detection success or if data from the two protocols are compatible for broad-scale analyses. Additionally, neither monitoring protocol includes a sampling design that allows for the separation of detection (p) into availability (pa), and detection given availability (pd). …
Examining Genome Size And Nutrient Influence On Damage Patterns, And Plant-Invertebrate Community Dynamics, Hailee B. Petosky
Examining Genome Size And Nutrient Influence On Damage Patterns, And Plant-Invertebrate Community Dynamics, Hailee B. Petosky
Dissertations, Master's Theses and Master's Reports
Genome size (GS) varies widely among angiosperms and has been shown to mediate plant responses to nutrients. Variations of GS drastically impact plant growth, fitness, and competitive responses, influencing plant functioning, nutrient requirements, and potentially, consumptive interactions. Specifically, plants with larger genomes vary in their cellular nutrient requirements, affecting tissue quality, nutrient constraints, and invertebrate interactions. Furthermore, environmental nutrient enrichments are a key driver affecting ecosystem functioning and species interactions. Plant communities are impacted by both top-down and bottom-up controls of herbivores and nutrients, respectively, and alterations to these interactions may cause cascading trophic level effects to influence damage patterns …
Epi- And Genomic Assessments Of Stamp Sand Toxicity And Population Structure Of Lake Superior Lake Trout (Salvelinus Namaycush) And Whitefish (Coregonus Clupeaformis), John C. Mccall
Dissertations, Master's Theses and Master's Reports
Native Lake Superior salmonid conservation is a notable success, as the only Great Lake with stable lake trout (LT) and whitefish fisheries (LWF). To quantify toxicity to LT and LWF from legacy pollution by mine tailings at Buffalo Reef in the Keweenaw Peninsula and assess their genetic structure across U.S. waters, I used reduced representation bisulfite sequencing and genotyped ~750 fishes from Buffalo Reef and Lake Superior. ~200-300 epigenetic marks in Buffalo Reef LT and LWF indicated dysregulation of pathways related to DNA damage, immune response, stress, and metabolism, relative to Lake Huron and Michigan outgroups. Population genomic analyses showed …
Divergent Response To Anthropogenic Change Within The Songbird Taxon: Insights From The Range Expansion Of The Northern Cardinal And Mitigation Mechanisms For Migratory Bird-Building Collisions, Jenna Brewer
Dissertations, Master's Theses and Master's Reports
Anthropogenic activities have impacted ecosystems across the globe. However, wildlife species have exhibited heterogenous responses to these novel changes, with some species experiencing population growth, and others succumbing to population decline. I studied examples of both within the songbird taxon, focusing on drivers of range expansion in the Northern Cardinal and acoustic mitigation mechanisms for migratory bird-building collisions, a source of decline for many songbird species. I found that the Northern Cardinal’s range was primarily a function of climatic stress, which was supported by the modulation of the molt process across latitudes. Specifically, Northern Cardinals exhibited faster feather growth rates …
A Multimolecular Perspective On The Success Of Wolf Recovery And Relocation, Samuel D. Hervey
A Multimolecular Perspective On The Success Of Wolf Recovery And Relocation, Samuel D. Hervey
Dissertations, Master's Theses and Master's Reports
With global biodiversity in decline and many species isolated in fragmented habitats, conservation efforts increasingly rely on natural recolonization and translocation to restore ecosystems. These strategies face challenges such as genetic erosion and habitat limitations, highlighting the need for effective monitoring practices. This research assesses the success of wolf recovery initiatives by examining long-term genetic and genomic health using both traditional and advanced molecular methods. First, we investigated the genetic health of 19 gray wolves (Canis lupus) relocated to Isle Royale National Park to restore ecosystem balance. Initial genetic assessments with microsatellites found that these wolves had genetic diversity metrics …
The Role Of Neighborhood Effects In Maintaining The Hardwood-Hemlock Mosaic, Adam Z. Milenkowic
The Role Of Neighborhood Effects In Maintaining The Hardwood-Hemlock Mosaic, Adam Z. Milenkowic
Dissertations, Master's Theses and Master's Reports
Neighborhood effects are processes mediated by canopy trees that influence the ability of a species to replace itself following canopy mortality. Sugar maple (Acer saccharum Marsh.) and eastern hemlock (Tsuga canadensis (L.) Carr.) are the dominant trees in old-growth northern hardwood forests of Upper Michigan and have been observed to form monodominant patches in the region. Few studies have independently evaluated the demographic and ecological mechanisms that lead to the compositional stability of hemlock and sugar maple patch development. Tree demography data from eight long-term 0.5 ha old-growth plots in Upper Michigan indicate neighborhood effects are playing a …
Social Interactions And Spatial Structure Drive Community Assembly Of Bacterial Biofilm, Matthew C. Bond
Social Interactions And Spatial Structure Drive Community Assembly Of Bacterial Biofilm, Matthew C. Bond
Dartmouth College Ph.D Dissertations
Despite the critical nature which microbial communities play in the natural world and human civilization, the breadth of understanding remains shallow. Challenged by scale, high variability between environments, and extensive diversity, microbial ecologists strive to understand connections between a community’s structure and function, as well as the ecological and evolutionary mechanisms underlying observed natural patterning of communities. Biofilms are the predominate mode of growth for microbial communities—characterized by cellular attachment to a surface via a self-produced matrix and heterogeneous structure, often resulting in a primary growth front along the biofilm surface due to differential access to bulk nutrients (cite). This …
Social Interaction, Social Cognition, And Personality In Gartersnakes And Ball Pythons, Morgan Skinner
Social Interaction, Social Cognition, And Personality In Gartersnakes And Ball Pythons, Morgan Skinner
Theses and Dissertations (Comprehensive)
Snakes are often considered non-social animals. However, this is mostly an untested assumption and the limited research that has been done has shown that snakes interact socially when given the opportunity. Here, the complexity of snake social interactions was explored through a social cognition and personality lens. Group and individual behavioural assays were used to explore flexibility and consistency in social interactions. The results provide evidence that elucidate the function, development, and evolution of these behaviours in snakes. In the first experimental chapter, chapter 2, social network analysis was used to provide a detailed description of aggregation behaviour in 4 …
Scale And Habitat Effects On Measurement Of Streptomyces Biogeography And Biodiversity, Terilyn A. Stoflet
Scale And Habitat Effects On Measurement Of Streptomyces Biogeography And Biodiversity, Terilyn A. Stoflet
Cal Poly Humboldt theses and projects
Bacteria in the genus Streptomyces are detected in most soils around the world, as well as on and in seeds, plants, animals, insects and the wind. Currently, more than 700 valid species of Streptomyces have been identified worldwide. Streptomyces produce the majority of antibiotics, antivirals and antifungals, as well as important agricultural bioactive molecules due to their unique genetic capabilities. Their distinct genetic abilities allow them to produce an unlimited amount of biosynthetic gene clusters, or BGC’s. Although many compounds come from Streptomyces, scientists have not discovered the biogeographic patterns of this genus. The biogeography of Streptomyces is a …
Lycosidae Abundance And Diversity Across Lawn And Leaf Litter Substrate, Sage O. Lockett, Dan Albrecht-Mallinger
Lycosidae Abundance And Diversity Across Lawn And Leaf Litter Substrate, Sage O. Lockett, Dan Albrecht-Mallinger
Undergraduate Research Posters
Significant knowledge gaps exist in how land-cover impacts ground-hunting spider populations. To fill these gaps, this study investigates a common family of ground-hunting spiders, Lycosidae, to determine differences in their abundance and diversity in deciduous leaf litter and managed turfgrass (lawn). The study was conducted within a forested ecosystem at Virginia Commonwealth University's Rice Rivers Center in Charles City County, Virginia. I placed 10 belt transects (1m x 20m) on lawn substrate and 10 identical transects in deciduous forest leaf litter substrate. I performed repeated visual census via eyeshine and manual capture of up to three individuals per transect …