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Articles 1951 - 1980 of 10253

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Bioaerosols Associated With Evaporative Cooler Use In Low-Income Homes In Semi-Arid Climates, Ashlin Elaine Cowger Jul 2019

Bioaerosols Associated With Evaporative Cooler Use In Low-Income Homes In Semi-Arid Climates, Ashlin Elaine Cowger

Theses and Dissertations

Asthma is the leading chronic illness in children in the United States. Since children in the U.S. spend a majority of their time indoors there is an increased need to understand key sources of daily asthma triggers in the home. Bacterial endotoxin, dust mite allergens and β-D-glucan have been shown to be potent inducers of asthma attacks, and high levels of these allergens in homes can trigger attacks in those with asthma. We aim to better understand the risks to those with asthma that might be associated with evaporative cooler (EC) use in low-income homes. ECs are often promoted because …

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Of Fire, Mammals, And Rain: Mechanisms Of Plant Invasions, Tara Boyce Bishop Jul 2019

Of Fire, Mammals, And Rain: Mechanisms Of Plant Invasions, Tara Boyce Bishop

Theses and Dissertations

Biological invasions are driving environmental state changes on a global scale. Exotic plant species must be successful at passing several abiotic and biotic filters to establish and disrupt the native plant community assembly. Understanding where exotic plants are on a regional scale and being able to characterize how exotic plants are generally interacting with their environment is crucial information for exotic species management (chapter 1). In the western United States human-related activities are augmenting the spread of exotic plant species by increasing the ignitions of wildfire. Wildfire can lead to nutrient pulses through the removal of intact native communities and …

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Characterizing Novel Pathways For Regulation And Function Of Ataxin-2, Elise Spencer Melhado Jul 2019

Characterizing Novel Pathways For Regulation And Function Of Ataxin-2, Elise Spencer Melhado

Theses and Dissertations

Ataxin-2 is an RNA-binding protein that is involved in many crucial cellular processes such as R-loop regulation, mRNA stability, TOR signaling regulation, and stress granule formation. Ataxin-2 is highly conserved, found in organisms ranging from Saccharomyces cerevisiae to Caenorhabditis elegans and Homo sapiens. Recently, ataxin-2 has been linked to the neurodegenerative disease Amyotrophic Lateral Sclerosis (ALS). ALS is a fatal disease that causes loss of motor neurons. In addition to ataxin-2 interacting with known ALS risk factor proteins, research into the relationship between ataxin-2 and ALS shows that polyglutamine expansions in ataxin-2 are gain-of-function mutations that lead to overactivity of …

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Whole-Genome Assembly Of Atriplex Hortensis L. Using Oxfordnanopore Technology With Chromatin-Contact Mapping, Spencer Philip Hunt Jul 2019

Whole-Genome Assembly Of Atriplex Hortensis L. Using Oxfordnanopore Technology With Chromatin-Contact Mapping, Spencer Philip Hunt

Theses and Dissertations

Atriplex hortensis (2n = 2x = 18, 1C genome size ~1.1 gigabases), also known as garden orach, is a highly nutritious, broadleaf annual of the Amaranthaceae-Chenopodiaceae family that has spread from its native Eurasia to other temperate and subtropical environments worldwide. Atriplex is a highly complex and polyphyletic genus of generally halophytic and/or xerophytic plants, some of which have been used as food sources for humans and animals alike. Although there is some literature describing the taxonomy and ecology of orach, there is a lack of genetic and genomic data that would otherwise help elucidate the genetic variation, phylogenetic position, …

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An Exploration Of Mechanisms Of Change In Compassion Focused Therapy Groups: A Pilot Study In A College Counseling Center Population, Jennifer Lynn Jensen Jul 2019

An Exploration Of Mechanisms Of Change In Compassion Focused Therapy Groups: A Pilot Study In A College Counseling Center Population, Jennifer Lynn Jensen

Theses and Dissertations

Objectives. This study explored mechanisms of change for Compassion Focused Therapy (CFT) groups. The feasibility and acceptability of a new group therapy protocol were assessed in a college counseling center population.Method. Seventy-five participants engaged in eight transdiagnostic CFT groups. Group CFT consisted of 12 weekly sessions. Participants completed measures of fears of compassion, flows of compassion, self-reassurance, self-criticism, shame, and psychiatric distress at pre, mid, and post time points. Significant and reliable change was assessed. Potential mechanisms of change were examined using correlations. Self-report feasibility and acceptability data were collected from therapists and participants respectively.Results. Significant and reliable change was …

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Landsat Collections Reveal Long-Term Algal Bloom Hot Spots Of Utah Lake, Rachel Shanae Tate Jul 2019

Landsat Collections Reveal Long-Term Algal Bloom Hot Spots Of Utah Lake, Rachel Shanae Tate

Theses and Dissertations

Harmful algal blooms (HABs) and nuisance algal blooms (NABs) are a worldwide phenomenon with implications for human health and safety. HABs occur when algae or bacteria grow in high enough densities to harm animals and humans. A primary component of harmful algal blooms is cyanobacteria, which are aquatic, photosynthesizing microorganisms that produce toxins at high concentrations. Cyanobacterial biomass has increased worldwide in recent decades, raising concern about the future of fresh- and marine-water systems in a changing climate. Understanding the patterns and conditions of past algal blooms can provide useful insights for managing future blooms. Remote sensing can enhance our …

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Isolation, Genetic Characterization And Clinical Application Of Bacteriophages Of Pathogenic Bacterial Species, Trever Leon Thurgood Jul 2019

Isolation, Genetic Characterization And Clinical Application Of Bacteriophages Of Pathogenic Bacterial Species, Trever Leon Thurgood

Theses and Dissertations

Bacteriophages (phages) are the smallest biological entity on the planet. They provide vast amounts of valuable knowledge to biologists. Phage genomes are relatively simple compared to the organisms they infect (prokaryotes) and yet continually point to the complexity surrounding molecular- and microbiological mechanisms of life. By studying phages we can learn of the systems of gene expression, protein interaction and DNA organization. Phages are useful not only from an academic perspective, but may also have useful clinical applications. In the face of the rise of antibiotic-resistant bacterial “super pathogens”, scientists and researchers turn to phages as alternative treatments to these …

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The Hero's Mother, Rosalyn Joy Ribeira Jul 2019

The Hero's Mother, Rosalyn Joy Ribeira

Theses and Dissertations

Sixteen-year-old Drea Grimm’s mother walked out of their family home at midnight seven years ago. All she left behind were notebooks full of made up stories and a family that Drea, being the oldest, was now in charge of. One day, Drea finds a mysterious letter with her name on it written in her mother’s handwriting and everything she thought was true is destroyed. With the help of her partner on a school project, Ian, Drea uses her mom’s stories and clues from her last moments to heal her family and maybe bring her mother home. But there is someone …

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Mechanism Of Positive, Non-Additive Litter Decomposition, Na Yin Jul 2019

Mechanism Of Positive, Non-Additive Litter Decomposition, Na Yin

Theses and Dissertations

Litter decomposition is a fundamental ecosystem process. It is responsible for nutrient cycling and influences carbon (C) sequestration, and soil physical and chemical properties. In nature, litter is usually heterogeneous and may not decompose the way homogeneous litter does. For example, heterogeneous litter decomposition is frequently non-additive. This makes the rate of nutrient cycling as well as fluxes of C into and out of soil C pools impossible to predict. The most frequently proposed mechanisms for positive, non-additive decomposition include the supply of limiting mineral nutrients, the supply of available C (priming), and the improvement of micro-environmental conditions. However, all …

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Sri Lankan Widows' Mental Health: Does Type Of Spousal Loss Matter?, Katrina Nicole Nelson Jul 2019

Sri Lankan Widows' Mental Health: Does Type Of Spousal Loss Matter?, Katrina Nicole Nelson

Theses and Dissertations

This study examined mental health outcomes for widowed Tamil women in Sri Lanka to identify any associations between type of spousal loss and several outcomes, including internalized stigma as a result of widowhood, anxiety symptoms, depressive symptoms, and posttraumatic stress symptoms. A sample of 381 Tamil female widows living in Eastern Sri Lanka were surveyed in 2016 to understand their experiences in a post-disaster and post-war context. Type of spousal loss was separated into seven categories: war-related death, death as a result of tsunami, illness-related deaths, accidental death, suicide, disappearance, and other. Path analysis was used to assess whether type …

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Isolation, Characterization, And Genomic Comparison Of Bacteriophages Of Enterobacteriales Order, Ruchira Sharma Jul 2019

Isolation, Characterization, And Genomic Comparison Of Bacteriophages Of Enterobacteriales Order, Ruchira Sharma

Theses and Dissertations

According to CDC, every year at least 2 million people are affected and 23,000 dies as a result of antibiotic resistance in U.S. It is considered one of the biggest threats to global health. More and more bacterial infections are becoming harder to treat. One such infection is fire blight, one of the most destructive disease of apple and pear trees. It is caused by bacteria Erwinia amylovora and its outbreaks have been known to destroy entire orchards in a single season. The conventional method of treatments includes use of antibiotics like streptomycin and oxytetracycline but the incidences like presence …

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The Relationship Between Vascular Endothelial Function Andpeak Exercise Blood Flow, Brady Edward Hanson Jul 2019

The Relationship Between Vascular Endothelial Function Andpeak Exercise Blood Flow, Brady Edward Hanson

Theses and Dissertations

Purpose The vascular endothelium is an influential contributor to vasodilation at rest, yet its role during peak exercise is relatively unknown. The purpose of this study is to determine if exercise leg blood flow during dynamic submaximal and maximal exercise is related to resting vascular endothelial function. Methods Nineteen subjects (aged 23 ± 0.57 yr) completed multiple assessments of vascular endothelial function including passive leg movement (PLM), rapid onset vasodilation, (ROV) and flow-mediated dilation (FMD). Peak muscle blood flow was assessed during single leg knee extension (KE) exercise. Doppler ultrasound of the femoral artery was utilized to assess muscle blood …

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She Will Find What Is Lost: Brian Kershisnik’S Artistic Response To The Problem Of Human Suffering, Cris Baird Jul 2019

She Will Find What Is Lost: Brian Kershisnik’S Artistic Response To The Problem Of Human Suffering, Cris Baird

BYU Studies

In March 2014, my wife, Janae, and I purchased Brian Kershisnik’s masterpiece She Will Find What Is Lost and immediately loaned it to The Church of Jesus Christ of Latter-day Saints for display in the Church’s Conference Center in downtown Salt Lake City, Utah.1 In this essay, I tell the story of how we came to own the painting, what it means to us, and why I believe the painting has a spiritually important and universally applicable message.

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Sequence Biostratigraphy Of Carboniferous-Permian Boundary Strata In Western Utah: Deciphering Eustatic And Tectonic Controls On Sedimentation In The Antler-Sonoma Distal Foreland Basin, Joshua Kerst Meibos Jul 2019

Sequence Biostratigraphy Of Carboniferous-Permian Boundary Strata In Western Utah: Deciphering Eustatic And Tectonic Controls On Sedimentation In The Antler-Sonoma Distal Foreland Basin, Joshua Kerst Meibos

Theses and Dissertations

The stratal architecture of the upper Ely Limestone and Mormon Gap Formation (Pennsylvanian-early Permian) in western Utah reflects the interaction of icehouse sea-level change and tectonic activity in the distal Antler-Sonoma foreland basin. Eighteen physically and biostratigraphically corelated stratigraphic sections provide a database for tracing Permo-Carboniferous boundary strata over a north-south distance of 60 km. These formations comprise 14 unconformity-bounded depositional sequence: three in the upper Ely (UE1-UE3) and 11 in the Mormon Gap Formation (MG1-MG11). Conodont and fusulinid faunas provide precise biostratigraphic information for a number of parasequences in the upper Ely and Mormon Gap formations. This paleontological information …

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Terrestrial Mollusks Of Great Basin National Park, The Snake Range, Nevada, Usa, Mark A. Ports Jun 2019

Terrestrial Mollusks Of Great Basin National Park, The Snake Range, Nevada, Usa, Mark A. Ports

Western North American Naturalist

In this paper I report on the poorly known terrestrial mollusk fauna of Great Basin National Park (Snake Range) of the central Great Basin, USA. Mollusk species and numbers were recorded according to habitat affinities defined by a combination of rock type, geomorphology, plant communities, and water sources. A total of 6892 individuals representing 18 species of land snails and 1 species of slug were identified from 50 stations within GBNP during the period of spring 2014 through summer 2016. Mollusks were surveyed by 186 soil/litter samples and 1755 min of hand searching. Twelve habitat types included 2 xeric limestone/dolomite …

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Role Of Electrical Synapses In Dopamine Transmission In The Brain, Josh Nelson, Seth Stapley, Scott Steffensen Jun 2019

Role Of Electrical Synapses In Dopamine Transmission In The Brain, Josh Nelson, Seth Stapley, Scott Steffensen

Journal of Undergraduate Research

Drug addiction has long been a major detriment to society. Its pervasive effects can tear apart the lives of addicted individuals. Many of these individuals go without seeking professional help. In 2015, 22.7 million Americans (8.6 percent) needed treatment for a problem related to drugs or alcohol, but only about 2.5 million people (0.9 percent) received treatment at a specialty facility. This may be due to inadequate treatment methods and therapies in use by professionals. The goal of this project is to better understand the mechanism of dopamine (DA) transmission in the brain in order to develop more effective treatment …

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Combating Obesity Through Gut Microbiome Targeted Bacteriophage Therapy, Gongze Zhao, Dr. Laura Bridgewater Jun 2019

Combating Obesity Through Gut Microbiome Targeted Bacteriophage Therapy, Gongze Zhao, Dr. Laura Bridgewater

Journal of Undergraduate Research

The human gut consists of approximately 1.5 kg of bacteria, and 50% of the biomass in our fecal matter is bacterial cells (Nicholson, 2005). Diet is a major factor in shaping the composition of the gut microbiota, (Zhang, 2010) which in turn influences the body by producing metabolites that enter the circulation through different pathways. In 2013, by using Koch’s postulates, scientists were able to demonstrate that the gram-negative opportunistic pathogen E. cloacae B29 can cause obesity and chronic inflammation in its host (Fei & Zhao, 2013). Bacteriophage (phage) are viruses that infect bacteria. Phages bind to their bacterial host …

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Multichannel Ubm Conduit For Peripheral Nerve Repair, Elizabeth Mahoney, Alonzo Cook Jun 2019

Multichannel Ubm Conduit For Peripheral Nerve Repair, Elizabeth Mahoney, Alonzo Cook

Journal of Undergraduate Research

Neuropathy, disease, and trauma to the peripheral nervous system cause devastating effects. These effects can include both a loss of sensation and a loss of motor control. Due to the newness of the field of regenerative medicine, scientists are only beginning to understand how nerves regenerate. It is known that when damage occurs to the nerves, the body triggers a regeneration process. Unfortunately, this process is slow and the level of sensation that returns and motor control varies from person to person. Some options involving autografts and allografts have been employed to help the nerve endings regenerate to all distal …

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Acute Ethanol Decreases Infiltration Of Macrophages Across The Blood-Brain Barrier, James Brundage, Jake Lattin, Dr. Scott Steffensen Jun 2019

Acute Ethanol Decreases Infiltration Of Macrophages Across The Blood-Brain Barrier, James Brundage, Jake Lattin, Dr. Scott Steffensen

Journal of Undergraduate Research

Alcohol addiction affects the lives of millions of people worldwide. In the US alone, an estimated 28 million are currently undergoing treatment to recover from the effects of alcohol abuse at the cost of over 249 billion dollars. The disease has dire consequences for those affected, as well as their families and communities. Despite this, the mechanism of alcohol addiction formation remains a question. One prominent theory relies on the mesolimbic circuitry of the brain, commonly referred to as the reward circuit. This region is made up of two key brain regions, the Nucleus Accumbens (NAc) and the Ventral Tegmental …

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Characters With Disabilities In Newbery Books: Analysis And Trends, Kellie Egan, Tina Dyches Jun 2019

Characters With Disabilities In Newbery Books: Analysis And Trends, Kellie Egan, Tina Dyches

Journal of Undergraduate Research

Children’s literature is an important tool that can be used to learn and grow in socially diverse environments. Realistic portrayals of characters with disabilities have the potential to promote acceptance and understanding of students with disabilities. 1Other studies have shown that the number of children’s books portraying characters with disabilities is not proportionate with the number of students in the United States with disabilities. However, over the years, the portrayal is becoming increasingly positive.

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Calling On Trial: Anticipated Calling Among Law School Students, Bradley Goronson, Jeffery Thompson Jun 2019

Calling On Trial: Anticipated Calling Among Law School Students, Bradley Goronson, Jeffery Thompson

Journal of Undergraduate Research

Human beings spend a large proportion of their time working. What one does for work will end up having a huge influence throughout their life. Given that this is the case, sociologists and psychologists have conducted research on the ways in which individuals attach meaning to their work. Within this stream of research, scholars have studied the experience of work as a deeply meaningful combination of using one’s passions and talents to help others-work as a calling. This research has typically been concerned with callings as work one is currently engaged in. A noteworthy paper by Kira Schabram and Sally …

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Archaeometry For The Ancestors: Stable Isotope Analysis Of Skeletal Remains From Huarochirí, Perú, Ridge Anderson, Zachary Chase, Phd Jun 2019

Archaeometry For The Ancestors: Stable Isotope Analysis Of Skeletal Remains From Huarochirí, Perú, Ridge Anderson, Zachary Chase, Phd

Journal of Undergraduate Research

The Huarochirí region of the central coast of Peru has been of utmost importance to Andean anthropologists since the late 1930s discovery of the Huarochirí Manuscript. The manuscript is the only historical document we have that is written in an indigenous Andean language. Consequently, it has been one of the main sources for understanding indigenous Andean lifeways leading up to the Early Colonial period. The first systematic archaeological research in this area commenced in 2010 under the Proyecto Arqueológico Huarochirí-Lurin Alto (PAHLA) directed by Dr. Zachary Chase. So far, the research involved in PAHLA indicates a different story than the …

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The Knights Of The River Rafts: Leadership Of The Common Citizens And Soldiers In Charles Dickens’S And Wilkie Collins’S The Perils Of Certain English Prisoners, Annika Carlson Jun 2019

The Knights Of The River Rafts: Leadership Of The Common Citizens And Soldiers In Charles Dickens’S And Wilkie Collins’S The Perils Of Certain English Prisoners, Annika Carlson

Student Works

The 1850s are infamous for the political scene within the British Empire and her colonies. The Crimean War against Russia, a rebellion in India treated as a mutiny against the empire, and a shifted focus to international issues over domestic problems highlighted every mistake and misstep of the largely aristocratic government. Rumbles of discontentment arose from the working class within Britain as they watched governmental neglect produce massive repercussions at home and abroad. Charles Dickens and Wilkie Collins wrote their 1857 novella The Perils of Certain English Prisoners with these perceived political disasters and leadership failures in mind. Leslie Mitchell …

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Observations Of Foothill Yellow-Legged Frog Predation By A Native Frog, Snake, And Giant Water Bug In A Central California Intermittent Stream, Robert A. Leidy, Rachael Ryan, Hana Moidu, Pablo Rodríguez-Lozano, Michael T. Bogan, Stephanie M. Carlson Jun 2019

Observations Of Foothill Yellow-Legged Frog Predation By A Native Frog, Snake, And Giant Water Bug In A Central California Intermittent Stream, Robert A. Leidy, Rachael Ryan, Hana Moidu, Pablo Rodríguez-Lozano, Michael T. Bogan, Stephanie M. Carlson

Western North American Naturalist

During the summers of 2015 and 2018, we observed predation on Foothill Yellow-legged Frogs (Rana boylii) by a giant water bug (Abedus indentatus), a California Red-legged Frog (Rana draytonii), and a Diablo Range Gartersnake (Thamnophis atratus zaxanthus) adjacent to 3 separate isolated pools along intermittent reaches of Coyote Creek, Santa Clara County, California, USA. To the best of our knowledge, our observations provide the first published record of California Red-legged Frog and giant water bug preying upon Foothill Yellow-legged Frogs. As pool habitat contracts over the course of the dry season, locally …

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"They Simply Act": Muscular Christian And Domestic Soldiers In Charles Dickens's And Wilkie Collins's The Perils Of Certain English Prisoners, Kathryn Sumsion Jun 2019

"They Simply Act": Muscular Christian And Domestic Soldiers In Charles Dickens's And Wilkie Collins's The Perils Of Certain English Prisoners, Kathryn Sumsion

Student Works

This paper discussion of Charles Dickens's and Wilkie Collins's use of domestic soldiers and muscular Christian soldiers in the 1857 Christmas novella,The Perils of Certain English Prisoners. It covers the frustration among Victorian society and especially the two authors regarding colonial government after the Crimean War and the Indian Mutiny. They bring the military forward as an alternative source of governing colonial power. Dickens characterizes ideal military power in the form of muscular Christian soldiers, while Collins favors domestic soldiers. In the end, both military roles are proved to be necessary in colonial governance.

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Predation By Long-Tailed Weasels Mustela Frenata During A Richardson's Ground Squirrel Urocitellus Richardsonii Population Outbreak In Southwestern Saskatchewan, Gilbert Proulx Jun 2019

Predation By Long-Tailed Weasels Mustela Frenata During A Richardson's Ground Squirrel Urocitellus Richardsonii Population Outbreak In Southwestern Saskatchewan, Gilbert Proulx

Western North American Naturalist

Long-tailed weasels (Mustela frenata) are known to feed on mice and voles. However, in the Canadian Prairies, where Richardson’s ground squirrels (Urocitellus richardsonii) are abundant (particularly during drought periods), long-tailed weasel predation on these medium-size rodents is poorly documented. In this study, predation by long-tailed weasels on Richardson’s ground squirrels was documented from April 2008 to September 2008 in southwestern Saskatchewan during a drought period. I found that Richardson’s ground squirrel remains were the dominant food item in percentage of occurrence, volume, and biomass from April to July. In August–September, however, deer mice (Peromyscus maniculatus …

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First Documented Observation Of Island Scrub-Jay (Aphelocoma Insularis) Precopulatory Display, Rebecca G. Cheek, Michelle L. Harris, Anna Kennedy Jun 2019

First Documented Observation Of Island Scrub-Jay (Aphelocoma Insularis) Precopulatory Display, Rebecca G. Cheek, Michelle L. Harris, Anna Kennedy

Western North American Naturalist

We report what we believe is the first documented observation of Island Scrub-Jay (Aphelocoma insularis) copulation behavior. We compare our observations to the behaviors of other Aphelocoma jays with the aim of identifying potential species-specific elements. There are observable differences between the precopulatory display of the Island Scrub-Jay and that of more distantly related Aphelocoma jays. The display of Island Scrub-Jay and that of the closely related California Scrub-Jay (Aphelocoma californica) are very similar despite the species being isolated from each other for approximately 1 million years.


Reportamos sobre lo que creemos que es la primera …

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Olive & Pekoe In Four Short Walks, Nan Rao Jun 2019

Olive & Pekoe In Four Short Walks, Nan Rao

Children's Book and Media Review

Best friends sometimes cannot be more opposite, and that certainly is true for the four-legged best buddies Olive and Pekoe. The book tells four little stories of the walks they go on. Olive is old, wise, and prefers resting around comfortably. Pekoe is lively, young, and loves to chase animals and is still sometimes unsure about the world. But that certainly does not prevent these two from enjoying each other’s company. They go on walks in the woods, not necessarily in inclement weather, surrounded by nature and visit the dog park.

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Tigers & Tea With Toppy, Nan Rao Jun 2019

Tigers & Tea With Toppy, Nan Rao

Children's Book and Media Review

Fridays are everyone’s favorite day of the week, and that certainly rings true for Rhoda, the granddaughter of wildlife artist Charles R. Knight. Every Friday after school, Rhoda embarks on an exciting fieldtrip with her Grandpa Toppy through the halls of American Museum of Natural History where his grandpa has dedicated his many famous paintings. Despite Toppy’s poor eyesight, his art pieces create a vivid ancient world that sparks the fascination of Rhoda and other museum visitors. Their weekend adventure continues with a visit to the Central Park Zoo. Toppy’s fascinating tales of the animals often creates a wonderful connection …

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The Big, Angry Roar, Carly Atchley Jun 2019

The Big, Angry Roar, Carly Atchley

Children's Book and Media Review

Zebras stamp and stomp when they’re angry. Hippos splatter and splash, and elephants trumpet. But what can a lion cub do when he’s so angry he feels he could burst? Cub gets in trouble when he fights with his sister and, looking to blow off steam, talks to different animals to try and discover what will make him feel better. Stomping just hurts his feet, and splashing makes him wet and smelly. He’s so mad at this point that he lets out a huge, angry ROAR—and causes a stampede. Cub is embarrassed and worried about the mess he’s caused, but …

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