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Articles 1 - 30 of 1183
Full-Text Articles in Life Sciences
Meat, The Future: The Role Of Regulators In The Lab-Grown Revolution, Joseph B. Davault, Michael S. Sinha
Meat, The Future: The Role Of Regulators In The Lab-Grown Revolution, Joseph B. Davault, Michael S. Sinha
All Faculty Scholarship
The United States is one of the largest consumers of meat globally. The production of meat contributes substantially to climate change due to the levels of greenhouse gasses emitted and the amount of land, water, feed, and other natural resources required to raise animals used for meat. Traditional meat production is another major source for the emergence of zoonotic diseases and antimicrobial-resistant pathogens. Nevertheless, Americans consume more meat now than at any time in the nation’s history.
Advocates for policy change aimed at addressing the risks associated with meat production have typically focused on reducing meat consumption, alternatives to meat, …
Managing Equine Metabolic Syndrome, Abigail Meldrum, Karl Hoopes
Managing Equine Metabolic Syndrome, Abigail Meldrum, Karl Hoopes
All Current Publications
Equine metabolic syndrome (EMS) is a relatively new disease that we are still learning about. There are many things to investigate when dealing with a new disease: causes, predispositions, symptoms, secondary issues, treatments, and prevention. Because changing the animal's feed regimen is currently the most effective and well-known way to manage EMS, this fact sheet focuses primarily on how diet can impact affected horses. As a newer syndrome, it is vital to learn as much as possible about it to understand, treat, and prevent this disease.
Using Annual Forages To Replace Declining Cool-Season Grass Pasture Availability, Jonathon Matthew Jenkins
Using Annual Forages To Replace Declining Cool-Season Grass Pasture Availability, Jonathon Matthew Jenkins
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
As land area in grain crop production increases in the US Midwest, perennial pasture availability decreases but the demand increases. Matching the seasonal growth patterns of C3 and C4 plant species to grow forages that are complementary allows producers to fill production gaps in otherwise monoculture systems and possibly increase overall productivity. One way to fill the forage production gap of C3 grass dominated pastures is by producing a warm-season, annual forage in a separate field. However, with continual reductions in land availability, this may not be an option. Using two studies, our objectives were to improve …
Comparing The Effectiveness Of Different Forms Of Vitamin E Supplementation (Liquid Vs. Powder) On Serum Alpha-Tocopherol Concentrations In Developing Horses, Emilia Fong-Gallagher
Comparing The Effectiveness Of Different Forms Of Vitamin E Supplementation (Liquid Vs. Powder) On Serum Alpha-Tocopherol Concentrations In Developing Horses, Emilia Fong-Gallagher
Honors Scholar Theses
Vitamin E is an essential antioxidant in equines that has a significant role in the nutritional requirements of horses to keep bodily systems functioning at optimal levels. Vitamin E deficiency is often associated with serious incurable neuromuscular diseases such as equine motor neuron disease and equine protozoal myeloencephalitis. Many horses stabled in urban areas are often deficient due to the lack of adequate grazing time as their natural source of vitamin E is from grass, and therefore should receive supplementation. This study evaluated the effectiveness of different forms of Elevate vitamin E supplement on the serum alpha-tocopherol concentrations in fourteen …
Grazing On The Arizona Strip: Catchment History And Repair, Melanie Heaton
Grazing On The Arizona Strip: Catchment History And Repair, Melanie Heaton
All Current Publications
Water, not forage, is the limiting factor for wildlife and livestock grazing the Arizona Strip, a nearly 3-million-acre piece of land located north of the Grand Canyon and south of the Utah border. Since springs and groundwater are rare or absent, harvesting of natural precipitation is the main source of water for animals. Catchment systems, which capture precipitation on a sloped rubber apron and contain it in a large tank or lined pond, are used by government agencies and grazing permittees to efficiently provide water for wildlife and livestock. As catchments reach the end of their useful lives, tank replacement …
Hilling As A Management Tactic And Tool For Understanding Soybean Gall Midge (Resseliella Maxima Gagné), Pragya Gupta
Hilling As A Management Tactic And Tool For Understanding Soybean Gall Midge (Resseliella Maxima Gagné), Pragya Gupta
Department of Entomology: Dissertations, Theses, and Student Research
Soybean gall midge (Resseliella maxima Gagné, SGM) emerged as a new species in the United States Midwest in 2019, causing injury to soybean (Glycine max L.) Infestation of R. maxima starts with females laying eggs in the fissures or cracks that develop at the base of soybean during the V2-V3 growth stage. The emerged larvae feed on the stem internally, leading to wilting and death of the plants. With knowledge gaps in biology and behavior, management strategies for this pest are challenging. Hilling is a cultural practice causing soil to cover the base of stems and is …
Physical Properties Of Odorants Affect Behavior Of Trained Detection Dogs During Close-Quarters Searches, Daniel Mejia, Lydia Burnett, Nicholas Hebdon, Peter Stevens, Alexis Shiber, Clay Cranston, Lauryn Degreeff, Lindsay D. Waldrop
Physical Properties Of Odorants Affect Behavior Of Trained Detection Dogs During Close-Quarters Searches, Daniel Mejia, Lydia Burnett, Nicholas Hebdon, Peter Stevens, Alexis Shiber, Clay Cranston, Lauryn Degreeff, Lindsay D. Waldrop
Biology, Chemistry, and Environmental Sciences Faculty Articles and Research
Trained detection dogs have a unique ability to find the sources of target odors in complex fluid environments. How dogs derive information about the source of an odor from an odor plume comprised of odorants with different physical properties, such as diffusivity, is currently unknown. Two volatile chemicals associated with explosive detection, ammonia (NH3, derived from ammonium nitrate-based explosives) and 2-ethyl-1-hexanol (2E1H, associated with composition C4 plastic explosives) were used to ascertain the effects of the physical properties of odorants on the search behavior and motion of trained dogs. NH3 has a diffusivity 3.6 times that of …
Animal Conservation In St. Louis, Kate O'Sullivan
Animal Conservation In St. Louis, Kate O'Sullivan
Undergraduate Research Symposium
St. Louis has a multitude of organizations involved in the natural sciences. But how many of them actually contribute towards animal conservation? The St. Louis Zoo is an organization that focuses a lot of its effort on presentation, so how does that impact the funds that go towards actually saving the animals? I plan to dive into the different animal-based organizations in St. Louis and its surrounding areas, as well as discuss the positives and negatives of each organization. Furthermore, I will provide examples from several sources that I have been reviewing all year to support my claims. I plan …
Surveys Of Aphonopelma Hentzi In Missouri: Conservation Efforts Through Population, Genetics, And Habitat Studies, Anderson B. Spencer Mr., Becky Hansis-O'Niell
Surveys Of Aphonopelma Hentzi In Missouri: Conservation Efforts Through Population, Genetics, And Habitat Studies, Anderson B. Spencer Mr., Becky Hansis-O'Niell
Undergraduate Research Symposium
Aphonopelma hentzi and other tarantula species are greatly understudied organisms. In the Missouri regions there is little knowledge on their mating patterns, gene diversity, or population sizes. The focal glades in this experiment display regional fragmentation, which could prevent tarantulas from traveling and mating between regions of their glades. Due to the lack of knowledge surrounding them, methods for determining gene diversity are harmful to the organism. Our recent work has shown that it is possible to extract genetic information from the molts of burrowing tarantulas. This will allow us to safely determine the lineages and interbreeding patterns of the …
You Can Lead A Horse To Water: Mapping Seasonal Water Resources To Predict Wild Horse Movements On Utah Rangelands, David C. Stoner, Eric Thacker, Linden Greenhalgh, Mark Nelson
You Can Lead A Horse To Water: Mapping Seasonal Water Resources To Predict Wild Horse Movements On Utah Rangelands, David C. Stoner, Eric Thacker, Linden Greenhalgh, Mark Nelson
All Current Publications
All wild horse herd management areas in Utah overlap BLM grazing allotments. Although horses and cattle have similar dietary habits, both species rely heavily on predictable water sources during dry periods. The concentration of wildlife and livestock in mesic areas during droughts can become problems for farmers and livestock producers. We aimed to map the annual distribution of temporary surface water across Utah that cattle, horses, and wildlife could use. Herein we analyzed an 18-year record of satellite imagery to create a statewide map of seasonal surface-water availability for agricultural and wildlife management purposes.
A Year Of Wins For Farmed Animals, Lewis Bollard
A Year Of Wins For Farmed Animals, Lewis Bollard
General – Farm Animal Issues
Although the European Union shelved its ambitious farmed animal welfare reforms, there were other “wins” for farmed animals in 2023. There were 130 new corporate pledges to eliminate cages for laying hens and the worst abuses of broiler chickens. So far, over 1,000 corporate pledges have been fully implemented, and 39% of American hens, 60% of European hens, and 80% of British hens are cage-free, up from 6%, 41%, and 48%, respectively, a decade ago. The US Supreme Court upheld California’s Proposition 12, which bans the sale of eggs, pork, and veal from caged animals and their offspring in California. …
The Influence Of Invasive Species On Fishers’ Satisfactions, Caroline M. Laplante
The Influence Of Invasive Species On Fishers’ Satisfactions, Caroline M. Laplante
School of Natural Resources: Dissertations, Theses, and Student Research
Invasives species are prevalent and widespread in North America. Outdoor recreational activities, such as fishing, introduce a point in which humans may interact with invasive species and have to adapt their own behaviors. Bigheaded carp in the Missouri River below Gavin’s Point Dam are a group of invasive fish species that were thought to be negatively relating to recreational fishers’ satisfactions. Using a content analysis and an importance-grid, we conclude that invasive species do not strongly relate to recreational paddlefish fishers’ satisfactions. Paddlefish fishers represent a small sub-set of recreational fishers in Nebraska and South Dakota. The content analysis revealed …
Game-Theoretic Approaches To Optimal Resource Allocation And Defense Strategies In Herbaceous Plants, Molly R. Creagar
Game-Theoretic Approaches To Optimal Resource Allocation And Defense Strategies In Herbaceous Plants, Molly R. Creagar
Department of Mathematics: Dissertations, Theses, and Student Research
Empirical evidence suggests that the attractiveness of a plant to herbivores can be affected by the investment in defense by neighboring plants, as well as investment in defense by the focal plant. Thus, allocation to defense may not only be influenced by the frequency and intensity of herbivory but also by defense strategies employed by other plants in the environment. We incorporate a neighborhood defense effect by applying spatial evolutionary game theory to optimal resource allocation in plants where cooperators are plants investing in defense and defectors are plants that do not. We use a stochastic dynamic programming model, along …
Multi-Omics Reveals Largely Distinct Transcript- And Protein-Level Responses To The Environment In An Intertidal Mussel, Lani U. Gleason, Florian J. Fekete, Richelle L. Tanner, W. Wesley Dowd
Multi-Omics Reveals Largely Distinct Transcript- And Protein-Level Responses To The Environment In An Intertidal Mussel, Lani U. Gleason, Florian J. Fekete, Richelle L. Tanner, W. Wesley Dowd
Biology, Chemistry, and Environmental Sciences Faculty Articles and Research
Organismal responses to stressful environments are influenced by numerous transcript- and protein-level mechanisms, and the relationships between expression changes at these levels are not always straightforward. Here, we used paired transcriptomic and proteomic datasets from two previous studies from gill of the California mussel, Mytilus californianus, to explore how simultaneous transcript and protein abundance patterns may diverge under different environmental scenarios. Field-acclimatized mussels were sampled from two disparate intertidal sites; individuals from one site were subjected to three further treatments (common garden, low-intertidal or high-intertidal outplant) that vary in temperature and feeding time. Assessing 1519 genes shared between …
Precipitation And Greenness In Pastoral Lands Of East Turkana, Kenya, Paul Akpejeluh
Precipitation And Greenness In Pastoral Lands Of East Turkana, Kenya, Paul Akpejeluh
School of Natural Resources: Dissertations, Theses, and Student Research
Pastoralism has long supported livelihoods and provided essential ecosystem services in landscapes of East Africa. Vegetation productivity is central to the functioning of pastoral systems but may be affected by changes in climate and landuse. Vegetation monitoring is important for understanding the effects of global change in pastoral lands; however, it can be time and resource intensive. Remote sensing provides opportunities for efficient multi-scale monitoring of vegetation and climatic drivers. In this thesis, I explore the utility of satellite and UAV remote sensing for monitoring vegetation and precipitation trends and relationships in the East of Lake Turkana Region of northern …
Conserving Nature's Chorus: Local And Landscape Features Promoting Frog Species Richness In Farm Dams, Martino E. Malerba, Jodi J L Rowley, Peter I. Macreadie, James Frazer, Nicholas J. Wright, Nayyar Zaidi, Asef Nazari, Dhananjay Thiruvady, Don A. Driscoll
Conserving Nature's Chorus: Local And Landscape Features Promoting Frog Species Richness In Farm Dams, Martino E. Malerba, Jodi J L Rowley, Peter I. Macreadie, James Frazer, Nicholas J. Wright, Nayyar Zaidi, Asef Nazari, Dhananjay Thiruvady, Don A. Driscoll
Climate Science Research Articles
Habitat loss is a key factor in the ongoing freshwater biodiversity crisis. A promising way to help tackle the rapid decline in freshwater biodiversity is to improve the potential for artificial wetlands to provide habitat for aquatic wildlife. Farm dams (also known as agricultural ponds) are among the most abundant waterbodies in agricultural landscapes and can act as “oases” against droughts for many species. Despite their prominent role in agriculture, predictive models to evaluate their ecological potential are yet to emerge. Here we use a continental-scale data set of 104,013 audio recordings from citizen scientists to identify and locate 107 …
Equine Nutrition: Pasture Planning In Nebraska, Emma Vazquez
Equine Nutrition: Pasture Planning In Nebraska, Emma Vazquez
Honors Theses
This paper describes the rationale behind four infographics on equine nutrition and pasture planning. These infographics are intended to provide Nebraskan horse owners with general advice on setting up and maintaining their pastures. The first three infographics cover pasture basics when building, pasture care, and ideal grass types. These grass types are further broken down between Western and Eastern Nebraska. Additionally, the fourth infographic gives some insight into why forage is a staple in the equine diet based on the digestive system.
All four infographics have been posted to the University of Nebraska-Lincoln’s Horse Program social media pages in an …
Equine Navicular Syndrome, Kylie Stephens, Karl Hoopes
Equine Navicular Syndrome, Kylie Stephens, Karl Hoopes
All Current Publications
Equine navicular syndrome has a large effect on the horse industry by accounting for up to one third of all chronic forelimb lamenesses. While the exact cause and development of this disease is still widely controversial, there are noticeable and significant changes to the internal anatomy and structures that could contribute to the possible onset of lameness. Three main causes are proposed that could play a role in the progression of this syndrome: biomechanical forces, vascular alterations, and chronic inflammation. The clinical signs of navicular syndrome can range from short choppy strides to intermittent lameness, as well as gait changes …
Cats Of Unl: An Investigation Into The Human-Feral Cat Relationships On A University Campus In Nebraska, Jacey Skoda
Cats Of Unl: An Investigation Into The Human-Feral Cat Relationships On A University Campus In Nebraska, Jacey Skoda
Honors Theses
At the University of Nebraska-Lincoln (UNL), there exists a population of feral cats that is monitored and cared for by a group known as Husker Cats. As the cats wander the sidewalks and gardens of the university, they may appear non-threatening and pleasant to have around. However, a feral cat presence could have detrimental impacts on the surrounding ecosystem, property, and community. The first component of this project, a survey of individuals on UNL campus, ultimately seeks to understand what those in the UNL community know about the feral cats, how they feel about the feral cats, and how they …
Fatty Acid, Carotenoid And Fat-Soluble Vitamin Composition Of Multispecies Swards Grown In Ireland—Implications For A Sustainable Feed In Dairy Farming, Samuel Rapisarda, Graham O'Neill, Nissreen Abu-Ghannam
Fatty Acid, Carotenoid And Fat-Soluble Vitamin Composition Of Multispecies Swards Grown In Ireland—Implications For A Sustainable Feed In Dairy Farming, Samuel Rapisarda, Graham O'Neill, Nissreen Abu-Ghannam
Articles
Although traditional ryegrass pastures are still commonly used, they require intense management and input and do not perform well during the summer months. Multispecies systems have been recognised as more sustainable, needing less fertiliser and being tolerant to drought and heat. While data on monoculture system fat composition exist, information for multispecies is scarce. The present study compared the fatty acid (FA), carotenoid and fat-soluble composition of a multispecies system (consisting of perennial ryegrass, timothy, white clover, red clover, chicory and plantain) (MULTI) with two other conventional grazing systems (monoculture perennial ryegrass (PRG) and a binary mixture of perennial ryegrass …
Comparing U.S. Groups’ Openness To Pro-Animal Actions, Jo Anderson, Zach Wulderk
Comparing U.S. Groups’ Openness To Pro-Animal Actions, Jo Anderson, Zach Wulderk
USA
As animal advocates know, an outreach tactic that is successful with one person will not necessarily be successful with all people. Advocates rarely launch campaigns with no idea of who will be seeing their ‘asks’ (i.e., requests for pro-animal actions). Even in the case of passive tactics such as billboards, advocates may know who frequents that part of the city. For example, they may be near a university, meaning their audience will include a high proportion of students. The United States public is diverse and groups of people can differ greatly in their opinions. Rather than taking a one-size-fits-all approach, …
Maintaining Pig Temperatures In The Summer And Winter Seasons, Jacob Hadfield, Jessie Hadfield, Joshua Dallin, Lorie Millward
Maintaining Pig Temperatures In The Summer And Winter Seasons, Jacob Hadfield, Jessie Hadfield, Joshua Dallin, Lorie Millward
All Current Publications
Utah often faces extreme temperatures in the summer and winter seasons. Due to the adverse weather, it can be difficult to raise pigs. This fact sheet discusses ways to help pigs adjust to hot and cold temperatures with facilities and management techniques.
Pasture Pig Basics, Jacob Hadfield, Jessie Hadfield, Joshua Dallin, Lorie Millward
Pasture Pig Basics, Jacob Hadfield, Jessie Hadfield, Joshua Dallin, Lorie Millward
All Current Publications
With an increasing push for more sustainable agriculture practices, raising pigs on pasture has gained much attention over recent years. Although it is possible to raise pigs on pasture, and this production method may support some sustainability goals, there are some important considerations. This fact sheet provides insight and answers to aspiring pig farmers so that they can make better-informed decisions before purchasing their pigs.
Prairie Dogs, Gary Witmer, Jon Grant, Kendra Cross
Prairie Dogs, Gary Witmer, Jon Grant, Kendra Cross
Wildlife Damage Management Technical Series
Prairie dogs (Cynomys spp.) occur throughout the prairie states of middle North America from Mexico northward into Canada. They occupy a variety of habitats from prairies to high mountain valleys and sage brush-dominated deserts. The most common species is the black-tailed prairie dog (Cynomys ludovicianus; Figure 1). Prairie dogs are considered a “keystone species.” They provide habitat for many other native, grassland species. Prairie dogs live in colonies or “towns” that can span hundreds to thousands of acres. Depending on the species, their presence is evident by their burrow system. Despite the many ecosystem benefits prairie dogs provide by modifying …
Bringing Back Former Vegans And Vegetarians: An Obstacle Analysis, Jo Anderson, Coni Arévalo
Bringing Back Former Vegans And Vegetarians: An Obstacle Analysis, Jo Anderson, Coni Arévalo
Diet
People have a variety of motivations for switching to plant-based diets, yet not all people who begin the transition to a vegan or vegetarian (collectively called veg*n) diet maintain it long-term. In fact, Faunalytics’ study of current and former veg*ns (2014) found that the number of lapsed (former) vegans and vegetarians in the United States far surpasses the number of current veg*ns, and most who lapse do so within a year. Are these people the low-hanging fruit for diet advocates? They could be—there are many of them and they’re clearly at least somewhat willing to go veg*n, so maybe more …
Methylene Blue Inhibits Cromakalim-Activated K+ Currents In Follicle-Enclosed Oocytes, Dmytro Isaev, Keun-Hang Susan Yang, Georg Petroianu, Dietrich Ernst Lorke, Murat Oz
Methylene Blue Inhibits Cromakalim-Activated K+ Currents In Follicle-Enclosed Oocytes, Dmytro Isaev, Keun-Hang Susan Yang, Georg Petroianu, Dietrich Ernst Lorke, Murat Oz
Biology, Chemistry, and Environmental Sciences Faculty Articles and Research
The effects of methylene blue (MB) on cromakalim-induced K+ currents were investigated in follicle-enclosed Xenopus oocytes. In concentrations ranging from 3–300 μM, MB inhibited K+ currents (IC50: 22.4 μM) activated by cromakalim, which activates KATP channels. MB inhibited cromakalim-activated K+ currents in a noncompetitive and voltage-independent manner. The respective EC50 and slope values for cromakalim-activation of K+ currents were 194 ± 21 µM and 0.91 for controls, and 206 ± 24 µM and 0.87 in the presence of 30 μM MB. The inhibition of cromakalim-induced K+ currents by MB was not …
Of Dogs And Bonds, Jeffrey R. Stevens
Of Dogs And Bonds, Jeffrey R. Stevens
Department of Psychology: Faculty Publications
In four of Charles Darwin’s classic works (Darwin, 1859, 1868, 1871, 1872), the domestic dog (Canis familiaris or Canis lupus familiaris)1 featured prominently, offering key examples to illustrate his ideas about evolution, domestication, comparative behavior and cognition, and emotional expression. Darwin held a clear fondness for dogs, and when replying to letters detailing the “sagacity” of dogs, he remarked “I can believe almost anything about them” (Darwin, 2014). Despite the early interest in their behavior and cognition by a number of leading scientists, dogs were rarely subject to serious investigation as a study species for 150 years. …
Internal Vertebral Morphology Of Bony Fishes Matches The Mechanical Demands Of Different Environments, Dana Baxter, Karly E. Cohen, Cassandra M. Donatelli, Eric D. Tytell
Internal Vertebral Morphology Of Bony Fishes Matches The Mechanical Demands Of Different Environments, Dana Baxter, Karly E. Cohen, Cassandra M. Donatelli, Eric D. Tytell
Engineering Faculty Articles and Research
Fishes have repeatedly evolved characteristic body shapes depending on how close they live to the substrate. Pelagic fishes live in open water and typically have narrow, streamlined body shapes; benthic and demersal fishes live close to the substrate; and demersal fishes often have deeper bodies. These shape differences are often associated with behavioral differences: pelagic fishes swim nearly constantly, demersal fishes tend to maneuver near the substrate, and benthic fishes often lie in wait on the substrate. We hypothesized that these morphological and behavioral differences would be reflected in the mechanical properties of the body, and specifically in vertebral column …
Chinese Consumers’ Attitudes Toward Animal Welfare: Behaviors, Beliefs, And Responses To Messaging, Jo Anderson
Chinese Consumers’ Attitudes Toward Animal Welfare: Behaviors, Beliefs, And Responses To Messaging, Jo Anderson
General - Animal Protection
Despite being comparatively neglected until recently, the suffering of animals in Asia is starting to command more attention from global animal advocacy activists. In particular, as the largest country in the world by both human and farmed animal population, and among the largest when measured by economy and land mass, China plays a central role here. However, the key question of how best to improve outcomes for farmed animals in China remains difficult to answer, due to the recency of the movement and a comparative lack of research on the topic.
Although China’s per capita meat consumption is lower than …
The Impact Of The Inclusion Of Grains In A Canine Diet On The Animal's Overall Health, Rachel Bruner
The Impact Of The Inclusion Of Grains In A Canine Diet On The Animal's Overall Health, Rachel Bruner
Honors Theses
The objective of this senior project was to examine the impacts that grains in a canine diet have on the overall health of the animal. Specifically, there was a focus on the nutritional attributes of grains, potential concerns regarding their inclusion in foods, misconceptions from consumers about grains in pet food, and alternatives to grains used in some diet formulations. The method of research for this project was a literature review. Scholarly articles focused on the various subtopics which helped to answer the research question were reviewed and included throughout the following discussion. Ultimately, the review of various literature resulted …