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Articles 61 - 90 of 1652
Full-Text Articles in Life Sciences
Greater Sage-Grouse Brood Responses To Livestock Grazing In Sagebrush Rangelands, Hailey Peatross Wayment
Greater Sage-Grouse Brood Responses To Livestock Grazing In Sagebrush Rangelands, Hailey Peatross Wayment
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The distribution and abundance of the greater sage-grouse (Centrocercus urophasianus; sage-grouse) have declined in the last 60 years. Range contractions and population declines have been attributed to loss and fragmentation of their sagebrush (Artemisia spp.) habitats. Grazing by livestock remains the predominant anthropogenic land-use across sagebrush ecosystems in North America, occurring on 87% of remaining sage-grouse habitat. Most of the peer-reviewed literature reports the potential for negative impacts of sagebrush reduction treatments, to increase livestock forage, on sage-grouse habitat. However, few studies have linked livestock grazing at the landscape level to vital rates (e.g., nest initiation rates, …
Impact Of Ph And Palmitic Acid On Ruminal Fermentation And Microbial Community Composition, Lexie Padilla
Impact Of Ph And Palmitic Acid On Ruminal Fermentation And Microbial Community Composition, Lexie Padilla
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The objective of this study was to evaluate the effects of dietary palmitic acid and pH on rumen fermentation, fiber digestibility, and bacterial community composition. The two factors in the experiment were palmitic acid treatment and pH treatment. Palmitic acid treatments included a control diet compared to a diet containing 1.5% palmitic acid. pH treatments included normal pH (6.6 to 7.0) compared to low pH (6.0 to 6.4). Rumen fluid from a cow was added to artificial rumens to study the effects of the two treatments relative to fermentation and changes within the microbial community. Results of the study showed …
A Music Composition Through The Use Of Animal Sounds, Andy Nguy
A Music Composition Through The Use Of Animal Sounds, Andy Nguy
Undergraduate Honors Capstone Projects
The knowledge on animals has been studied over many years by researching and understanding animal behavior and creativity with music. Bioacoustics shows a great deal when it comes to collecting sounds through many principles for sound data collection. With saved recording of animals, music, speeches, and so much more, it has impacted the way music is created through technology. Music production has been advancing in many creative ways. The foundation of sound manipulation is musique concrète. The project uses these concepts of audio recording and digital sounds to produce a composition that includes animal sounds.
Importance Of A Dietary Cation-Anion Difference In Peripartum Dairy Cows, Laura A. Motsinger, Jacob Hadfield
Importance Of A Dietary Cation-Anion Difference In Peripartum Dairy Cows, Laura A. Motsinger, Jacob Hadfield
All Current Publications
At calving, nutrient requirements of dairy cows increase to support milk synthesis. Energy and protein requirements are increased at the initiation of lactation (Moore et al., 2000). Additionally, calcium requirements increase tremendously to meet the demands of lactation (Moore et al., 2000). Calving and subsequent milk synthesis can cause calcium concentrations in the blood to drop. When the demand for calcium exceeds the cow’s ability to mobilize calcium, hypocalcemia (low blood calcium) occurs, which can negatively impact production. This fact sheet reviews hypocalcemia in dairy cows and how to implement hypocalcemia prevention strategies.
Test-Driving The Next Generation Of Crispr Gene Editing, Olivia Gornichec, Kailey Mayer
Test-Driving The Next Generation Of Crispr Gene Editing, Olivia Gornichec, Kailey Mayer
Research on Capitol Hill
USU team Kailey, recent graduate of animal science, and Olivia, senior in biochemistry, have led and funded this project through a student grant. CRISPR has been making waves in the scientific community for its potential to help us edit genomes. However, that is just one of the known types of CRISPR, and other types aren’t in forms that are accessible to study. Kailey and Olivia have successfully cloned Type IV-B into a plasmid that can now be used to perform further research into what this system does. The two students never expected that, as undergrads, they would make a foundation-level …
Drought Mitigation For Cow/Calf Producers: Depopulation Strategies, Reganne K. Briggs, Joshua Dallin, Jacob Hadfield, Matthew D. Garcia
Drought Mitigation For Cow/Calf Producers: Depopulation Strategies, Reganne K. Briggs, Joshua Dallin, Jacob Hadfield, Matthew D. Garcia
All Current Publications
Drought is a recurring event faced by many cow/calf producers across the nation. As drought events increase in their severity, it is important for cattle producers to have a management plan to mitigate the economic effects of drought. Two of the most common strategies for mitigating the effects of drought include buying additional feed and depopulating a portion of the herd. This fact sheet reviews strategies that will guide the decision-making process to cull cattle during drought.
Is Mitigation Translocation An Effective Strategy For Conserving Common Chuckwallas?, Chad A. Rubke, Daniel J. Leavitt, Woodrow L. Crumbo, Brock Williams, Ashley A. Grimsley-Padron, Kristin J. Gade, Russell Benford, Michael F. Ingraldi, Brian K. Sullivan, Ryan P. O’Donnell
Is Mitigation Translocation An Effective Strategy For Conserving Common Chuckwallas?, Chad A. Rubke, Daniel J. Leavitt, Woodrow L. Crumbo, Brock Williams, Ashley A. Grimsley-Padron, Kristin J. Gade, Russell Benford, Michael F. Ingraldi, Brian K. Sullivan, Ryan P. O’Donnell
Human–Wildlife Interactions
Mitigation translocation remains a popular conservation tool despite ongoing debate regarding its utility for population conservation. To add to the understanding of the effectiveness of mitigation translocation, in 2017 and 2018 we monitored a population of protected common chuckwallas (Sauromalus ater) following translocation away from the area of construction of a new highway near the South Mountains, Phoenix, Arizona, USA. We removed chuckwallas from the construction right-of-way, paint-marked and pit-tagged them, and then released them in a nearby municipal preserve. We deployed very high frequency radio-telemetry transmitters on a sub-sample of 15 translocated adult chuckwallas. We monitored the …
Nonnative Ungulate Impacts On Greater Sage-Grouse Late Brood-Rearing Habitat In The Great Basin, Usa, Mikiah R. Mcginn, Steven L. Petersen, Melissa S. Chelak, Randy T. Larsen, Loreen Allphin, Brock R. Mcmillan, Dennis L. Eggett, Terry A. Messmer
Nonnative Ungulate Impacts On Greater Sage-Grouse Late Brood-Rearing Habitat In The Great Basin, Usa, Mikiah R. Mcginn, Steven L. Petersen, Melissa S. Chelak, Randy T. Larsen, Loreen Allphin, Brock R. Mcmillan, Dennis L. Eggett, Terry A. Messmer
Human–Wildlife Interactions
Domestic livestock grazing is the dominant land use on much of the current range inhabited by greater sage-grouse (Centrocercus urophasianus; sage-grouse) in the western United States. Nonnative feral horses (Equus ferus caballus) also inhabit important sage-grouse seasonal habitats. Overabundant feral horse populations and improper grazing by domestic cattle (Bos taurus) can impact the health of sagebrush (Artemisia spp.) and desert shrub rangeland communities and native wildlife. These impacts to sage-grouse can be exacerbated when they affect late brood-rearing habitat, which provide the forbs and arthropods required to fledge broods. Managers require better information …
The Impact Of Covid-19 On Wildlife Strike Rates In The United States, Dan Parsons, Michael Malouf, Wayne Martin
The Impact Of Covid-19 On Wildlife Strike Rates In The United States, Dan Parsons, Michael Malouf, Wayne Martin
Human–Wildlife Interactions
Shortly after the COVID-19 pandemic impacted air traffic, industry bodies warned of the potential increase in wildlife strike risk. Prior to the pandemic, wildlife strikes were already a concern to the industry. We sought to evaluate industry warnings using interrupted time series analysis of wildlife strike trends in the United States. Using pre-pandemic wildlife strike trends, we compared a forecast of the expected monthly strike rates through the COVID-19 impact period (March 2020 to December 2020) to the actual wildlife strike rates for the same period. Our results showed an increase in wildlife strike rates in 5 out of the …
A Call For Ethical And Responsible Treatment Of Invasive Species By Recreational Anglers, Kevin A. Adeli
A Call For Ethical And Responsible Treatment Of Invasive Species By Recreational Anglers, Kevin A. Adeli
Human–Wildlife Interactions
Invasive species pose a prominent threat to global biodiversity, with aquatic ecosystems being particularly susceptible. In an effort to limit the spread of aquatic invasive species, numerous public awareness programs have been launched, and several regions have enacted “must-kill” angling regulations, which prohibit the live release of invasive fish species when captured. Many education programs, however, demonize invasive species and lack any instruction for humane euthanasia. This unbalanced approach has translated into widespread mistreatment of invasive species among recreational anglers. This piece addresses these concerns by discussing their significance and providing recommendations for how education programs can adopt a more …
Wyoming’S Wild Horse Ranch: History And Description Of A Socio-Ecological Experiment, Alex Sas-Jaworsky, John Derek Scasta
Wyoming’S Wild Horse Ranch: History And Description Of A Socio-Ecological Experiment, Alex Sas-Jaworsky, John Derek Scasta
Human–Wildlife Interactions
The growing population of free-roaming horses (Equus ferus caballus) on western public rangelands has necessitated that federal agencies, such as the Bureau of Land Management (BLM) and U.S. Forest Service, develop novel approaches to curb growth including reproduction management. However, bureaucracy has hindered effective research and application of horse management on public lands and examples on private lands may present new solutions. Here we present the history and current population management strategy for the Wild Horse Ranch (WHR) located in southeastern Wyoming, USA, as an example of an ongoing private entity managing horses. Prior to 1985, this ~6,000-ha …
Partnerships Create Success For The Devil’S Garden Wild Horses, Laura K. Snell
Partnerships Create Success For The Devil’S Garden Wild Horses, Laura K. Snell
Human–Wildlife Interactions
Many wild horse (Equus ferus caballus) populations that inhabit designated federal land in the United States currently exceed management objectives. Overabundant wild horse populations can adversely impact the ecosystem, native wildlife, and other land uses. Unfortunately, there is not a universal solution, as each impacted area may differ ecologically, economically, socially, and politically. Wild horse management is not just a 1-time project but a long-term program where buy-in is needed from the federal and state agencies, local governments, and private partners. Local county governments and private partners can have important insights and significant influence on the development and …
Mitigating Bighorn Sheep–Vehicle Collisions And Habitat Fragmentation With Overpasses And Adaptive Mitigation, Jeffrey W. Gagnon, Chad D. Loberger, Kari S. Ogren, Scott C. Sprague, Susan R. Boe, Raymond E. Schweinsburg
Mitigating Bighorn Sheep–Vehicle Collisions And Habitat Fragmentation With Overpasses And Adaptive Mitigation, Jeffrey W. Gagnon, Chad D. Loberger, Kari S. Ogren, Scott C. Sprague, Susan R. Boe, Raymond E. Schweinsburg
Human–Wildlife Interactions
As transportation infrastructure expands to accommodate increasing human population growth, wildlife–vehicle conflicts (WVCs) are a growing concern for motorist safety and wildlife populations. In the case of large ungulates, minimal information exists on successful mitigation of WVCs involving bighorn sheep (Ovis canadensis) and habitat fragmentation. Too address this void, we evaluated the effectiveness of 3 new wildlife overpasses, 3 culverts, 2 bridges, and ungulate exclusionary fencing as potential desert bighorn sheep (O. c. nelsoni; sheep) crossing opportunities along US Highway 93 in Arizona, USA. We evaluated sheep movements using global positioning system (GPS) radio-transmitter collars and …
European Starling Use Of Nest Boxes Relative To Human Disturbance, Bradley F. Blackwell, Bruce N. Buckingham, Morgan B. Pfeiffer
European Starling Use Of Nest Boxes Relative To Human Disturbance, Bradley F. Blackwell, Bruce N. Buckingham, Morgan B. Pfeiffer
Human–Wildlife Interactions
European starling (Sturnus vulgaris; starling) nesting poses debris hazards within airport hangars and to engine and flight surfaces of moored aircraft. We questioned whether consistent removal of nest material would negatively affect use of a nest site, measured by a reduction in material accumulation. We conducted our study on a 2,200-ha site in Erie County, Ohio, USA (41° 22’ N, 82° 41’ W), from April 15 through June 2, 2020. We used 120 wooden nest boxes on utility poles, protected by an aluminum predator guard below the box. Our treatments included (1) twice weekly, repeated nest material removal …
Industrial Hemp As A Resource For Birds In Agroecosystems: Human–Wildlife Conflict Or Conservation Opportunity?, Emily A. Kotten, Iona Hennessy, Bryan M. Kluever, Zachary T. Brym, Bradley F. Blackwell, Lee A. Humberg, Page E. Klug
Industrial Hemp As A Resource For Birds In Agroecosystems: Human–Wildlife Conflict Or Conservation Opportunity?, Emily A. Kotten, Iona Hennessy, Bryan M. Kluever, Zachary T. Brym, Bradley F. Blackwell, Lee A. Humberg, Page E. Klug
Human–Wildlife Interactions
Industrial hemp (Cannabis sativa L.; hemp) is an emerging crop in the United States with little known about bird use or the potential for birds to become an agricultural pest. We identified birds associated with hemp fields, using repeated visits to oilseed plots in North Dakota, USA (n = 6) and cannabinoid (CBD) plots in Florida, USA (n = 4) from August to November 2020. We did not control for plot area or density; our observations were descriptive only. We observed 10 species in hemp, 12 species flying over hemp, and 11 species both foraging in and …
Bear-Caused Human Fatalities In Yellowstone National Park: Characteristics And Trends, Kerry A. Gunther
Bear-Caused Human Fatalities In Yellowstone National Park: Characteristics And Trends, Kerry A. Gunther
Human–Wildlife Interactions
Three fatal bear (Ursus spp.) attacks in Yellowstone National Park (YNP), USA, from 2011 to 2015 were a catalyst for YNP managers to evaluate the circumstances of bear-caused fatalities as well as the bear safety messages it distributes to park visitors. I reviewed records of all fatal bear attacks that occurred in YNP from 1872 to 2018. Seven of the 8 fatalities were caused by grizzly bears (U. arctos horribilis). The per capita risk of being killed by a grizzly bear was 1 fatality for every 26.2 million park visits. Most fatal bear attacks in YNP involved …
Impact Of Covid-19 On Aviation-Wildlife Strikes Across Europe, Isabel C. Metz, Marta Giordano, Dionysios Ntampakis, Marianna Moira, Anneke Hamann, Rosanne Blijleven, Jürgen J. Ebert, Alessandro Montemaggiori
Impact Of Covid-19 On Aviation-Wildlife Strikes Across Europe, Isabel C. Metz, Marta Giordano, Dionysios Ntampakis, Marianna Moira, Anneke Hamann, Rosanne Blijleven, Jürgen J. Ebert, Alessandro Montemaggiori
Human–Wildlife Interactions
Collisions between aircraft and wildlife (i.e., wildlife strikes) pose a serious threat toward the safety of aircraft, its crew, and passengers. The effects of COVID-19 related travel restrictions on wildlife strikes are unknown. With this study, we aim to address this information gap by assessing the changes of wildlife hazard management performance across European airports during the lockdown period (e.g., period of reduced operations and borders closure in spring 2020). We also sought to raise awareness of the importance of wildlife strike prevention in times of reduced operations. The objective of our study was to compare wildlife strike data before …
Trico: A Novel Repellent For Preventing Deer Damage To Ornamental Shrubs, Paul D. Curtis, Brian C. Eshenaur
Trico: A Novel Repellent For Preventing Deer Damage To Ornamental Shrubs, Paul D. Curtis, Brian C. Eshenaur
Human–Wildlife Interactions
Homeowners whose landscape plants are repeatedly browsed by white-tailed deer (Odocoileus virginianus; deer) desire repellent products that are effective and long-lasting. We conducted a 12-week trial from January 6 through April 5, 2021 to test the duration and efficacy of a novel deer repellent (Trico®) relative to Plantskydd®, a commonly used deer repellent, and untreated plants. We placed treated and control Japanese yew shrubs (Taxus media ‘Hicksii’) at 4 homeowner sites (Birch Hills Drive, Fairview Crescent, Pinegrove Ave., and St. Paul Blvd.) near Rochester, New York, USA, where we detected deer presence. Yews are frequently eaten …
Fertility Control Options For Management Of Free-Roaming Horse Populations, Ursula S. Bechert, John W. Turner Jr., Dan L. Baker, Douglas C. Eckery, Jason E. Bruemmer, Candace C. Lyman, Tulio M. Prado, Sarah R. B. King, Mark A. Fraker
Fertility Control Options For Management Of Free-Roaming Horse Populations, Ursula S. Bechert, John W. Turner Jr., Dan L. Baker, Douglas C. Eckery, Jason E. Bruemmer, Candace C. Lyman, Tulio M. Prado, Sarah R. B. King, Mark A. Fraker
Human–Wildlife Interactions
The management of free-roaming horses (Equus ferus) and burros (E. asinus) in the United States has been referred to as a “wicked problem” because, although there are population control options, societal values will ultimately determine what is acceptable and what is not. In the United States, free-roaming equids are managed by different types of organizations and agencies, and the landscapes that these animals inhabit vary widely in terms of access, size, topography, climate, natural resources, flora, and fauna. This landscape diversity, coupled with contemporary socioeconomic and political environments, means that adaptive management practices are needed to …
Dehydration And Mortality Of Feral Horses And Burros: A Systematic Review Of Reported Deaths, John Derek Scasta, Eric Thacker, Jacob D. Hennig, Karl Hoopes
Dehydration And Mortality Of Feral Horses And Burros: A Systematic Review Of Reported Deaths, John Derek Scasta, Eric Thacker, Jacob D. Hennig, Karl Hoopes
Human–Wildlife Interactions
Water is a requirement for all organisms, including equids. Dehydration-caused mortality of feral horses (Equus ferus caballus) is often cited as a cause of concern and as justification for management of feral horses, yet a paucity of information exists on the matter. We conducted a systematic review from September 1, 2020 through January 15, 2021 of available news reports of feral horse and burro (E. asinus) dehydration mortalities and public interventions to save horses using a public search engine with a priori defined search term combinations and additional snowball sampling. We found 15 uniquely reported mortality …
Stakeholder Acceptance Of Wild Equid Fertility Control Mirrors Global Shifts In Attitudes To Wildlife Management, Giovanna Massei, Stephanie L. Boyles Griffin
Stakeholder Acceptance Of Wild Equid Fertility Control Mirrors Global Shifts In Attitudes To Wildlife Management, Giovanna Massei, Stephanie L. Boyles Griffin
Human–Wildlife Interactions
Wild equid (horses [Equus ferus] and burros [E. asinus]) populations have increased on public lands in the United States since the passage of the Wild Free-Roaming Horses and Burros Act of 1971. As of March 1, 2022, the Bureau of Land Management (BLM) estimated that wild equid populations on designated herd management areas (HMAs) may exceed 82,000 animals. In 2020, the total population of wild equids in the United States was estimated to exceed 300,000 animals. The BLM sets an appropriate management level (AML) for wild horse and burro herds on each HMA and removes animals …
Feral Horses, Feral Asses, And Professional Politicians: Broodings From A Beleaguered Biologist, Vernon C. Bleich
Feral Horses, Feral Asses, And Professional Politicians: Broodings From A Beleaguered Biologist, Vernon C. Bleich
Human–Wildlife Interactions
As a member of National Wild Horse and Burro Advisory Board, I gained insight into several aspects of feral equid management that previously had been somewhat cryptic. Foremost in my experience, though, was the dedication and professionalism of the board members with whom I served. During my tenure, the professional approach to management and the frustration faced by employees within the Horse and Burro Program became increasingly apparent. Further came the realization that the effectiveness of the board and program can be improved substantially, if (1) the board is provided the opportunity to rebut or counter incorrect or misleading information …
Digitization Of Entomological Collections At Usu, Eastern Using Scan (Symbiota Collections Of Arthropods Network) Data Portal And Seek! Inaturalist App, Alexandra Cartwright
Digitization Of Entomological Collections At Usu, Eastern Using Scan (Symbiota Collections Of Arthropods Network) Data Portal And Seek! Inaturalist App, Alexandra Cartwright
Fall Student Research Symposium 2021
Pollinators, including bees, provide valuable ecosystem services for native plants and agricultural species. Phenology, or the timing of biological events such as flowering of plants, is changing as a result of climate change. The digitization of specimens allows for insights into species distributions, seasonality, and phenology in 60-70-year-old collections. The entomological collection at Utah State University, Eastern houses approximately 3,000 individual specimens and over 100 bees. The oldest specimens date from 1953, many from the 1960s, 70s, & 80s and the majority of specimens are from Carbon and Emery Counties. Digitization of entomological collections can provide: species distributions: Which species …
True Grit (1969) And Feminism: How It Succeeds And Why We Should Expect Better, Courtney Isom
True Grit (1969) And Feminism: How It Succeeds And Why We Should Expect Better, Courtney Isom
Fall Student Research Symposium 2021
Hollywood Westerns are certainly not renowned for their contribution to feminist plots or characters, but True Grit (1969) is one of the more forward thinking movies with respect to women’s roles. However, the movie still portrays traditional power structures of patriarchy that undermine the female character’s autonomy. Looking at this film through the lens of both Critical Rhetoric and a Gender Diversity Perspective allows us to see the nuances of Mattie Ross' stand against oppressive traditional roles, while also examining the ways in which she is still dominated by discursive patriarchal practices. Celeste Condit’s gender diversity perspective encourages ditching traditional …
Universal Healthcare: Is It The Future?, Izzy Wappett
Universal Healthcare: Is It The Future?, Izzy Wappett
Fall Student Research Symposium 2021
About 8.5% of the United States population has no form of healthcare. The rest of the population either has a form of public or private insurance given to them by the government, private insurers, or employers. But there are countries worldwide that have systems where every citizen has healthcare. This is called universal healthcare. Universal Healthcare has shown to be more effective because it portrays healthcare as less of a privilege and more of a right to all. But many Americans view this kind of system as controlling and a system that takes away your freedom. But as studies and …
Impact Of Fish Oil On Intestinal Permeability, Inflammation, And Performance In Swine, Anthony Fernando Alberto
Impact Of Fish Oil On Intestinal Permeability, Inflammation, And Performance In Swine, Anthony Fernando Alberto
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Our research examined the effects of fish oil supplementation on intestinal permeability, systemic inflammation and performance in piglets. An lipopolysaccharide (LPS) challenge was done to stimulate the synthesis and release of the cytokines, in an effort to mimic the immune response that piglets would have when facing stress or pathogen challenge. Fish oil increased feed intake but did not affect growth when compared to control. Total fatty acid digestibility increased by 6% when fish oil was included in the diet. Also, we observed a 16% increase on 16-carbon fatty acids digestibility. Fish oil did not affect the plasma …
Intraspecific Variation In Prey Susceptibility Mediates The Consumptive Effect Of Predation: A Case Study Of Yellowstone Elk And Wolves, Lacy M. Smith
Intraspecific Variation In Prey Susceptibility Mediates The Consumptive Effect Of Predation: A Case Study Of Yellowstone Elk And Wolves, Lacy M. Smith
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The reintroduction of wolves (Canis lupus) to Yellowstone National Park starting in 1995 is an important case study for understanding the consequences of predation on a prey population. Simulation studies conducted prior to and shortly after wolf reintroduction predicted that wolf predation of elk (Cervus canadensis) would have a modest influence on elk abundance. Predation of elk by wolves has been well documented and elk have remained the primary prey for wolves despite a decline in elk abundance. I used two quantitative approaches to estimate the influence of wolf predation on adult female elk survival and …
Passive Acoustic Monitoring And Automatic Detection Of Diel Patterns And Acoustic Structure Of Howler Monkey Roars, Leandro A. Do Nascimento, Cristian Pérez-Granados, Karen H. Beard
Passive Acoustic Monitoring And Automatic Detection Of Diel Patterns And Acoustic Structure Of Howler Monkey Roars, Leandro A. Do Nascimento, Cristian Pérez-Granados, Karen H. Beard
Wildland Resources Faculty Publications
Nighttime studies are underrepresented in ecological research. Even well-known behaviors, such as the loud call of howler monkeys, are rarely studied at night. Our goal was to help fill this knowledge gap by studying the 24 h vocal behavior of the Guianan red howler monkey (Alouatta macconnelli) and to compare the acoustic structures of howling bouts made during the day to those made at night. We used passive acoustic monitoring coupled with automatic acoustic detection to study three groups of howlers over three months in the Viruá National Park, Roraima, Brazil. The automatic classifier we built detected 171 …
Rapid Quantitative Analysis Of Toxic Norditerpenoid Alkaloids In Larkspur (Delphinium Spp.) By Flow Injection - Electrospray Ionization – Mass Spectrometry, Dale R. Gardner, Stephen T. Lee, Daniel Cook
Rapid Quantitative Analysis Of Toxic Norditerpenoid Alkaloids In Larkspur (Delphinium Spp.) By Flow Injection - Electrospray Ionization – Mass Spectrometry, Dale R. Gardner, Stephen T. Lee, Daniel Cook
Poisonous Plant Research (PPR)
A rapid flow injection - electrospray ionization – mass spectrometry (FI-ESI-MS) method for the quantitative and qualitative analysis of norditerpenoid alkaloids in larkspur plants was developed. The FI-ESI-MS method was calibrated for alkaloid concentrations with larkspur plant samples against an existing Fourier transform infrared spectroscopy FTIR method. There was a strong correlation (r = 0.9926, r = 0.9891) between the FTIR and FI-ESI-MS methods. The relative standard deviation (RSD) for all measurements were ≤ 6.2 % except for the sample with the lowest concentration which was 19%. The sample throughput of the FI-ESI-MS method is much higher than the FTIR …
Heat Stress And Reproduction In Beef Cattle, Reganne K. Briggs, Kerry A. Rood
Heat Stress And Reproduction In Beef Cattle, Reganne K. Briggs, Kerry A. Rood
All Current Publications
Reproduction could be considered the most important production trait on a cow-calf operation. Economic outputs are sustained when cattle rebreed and calve every year in a timely manner. However, when cattle are unable to rebreed efficiently, profits may decrease for producers. It is well known that heat stress can negatively impact reproduction in cattle (Jordan, 2003). The Intermountain West has been impacted by drought and increasing temperatures, both of which can impact reproduction rates in cattle. This fact sheet helps producers understand the consequences of heat stress on cattle reproduction and how they can manage reproduction during increasing temperatures.