Digital Commons Network^™

Sigma Virus (Dmelsv) Incidence In Lines Of Drosophila Melanogaster Selected For Survival Following Infection With Bacillus Cereus, Meghan L. Bentz, Eve A. Humphrey, Lawrence G. Harshman

School of Biological Sciences: Faculty Publications

The immune response of Drosophila melanogaster is complex and involves both specific and general responses to parasites. In this study we tested for cross-immunity for bacteria and viruses by scoring the incidence of infection with the vertically transmitted Sigma virus (DMelSV) in the progeny of a cross between females transmitting DMelSV at high frequencies and males from lines subjected to three selection regimes related to resistance to Bacillus cereus. There was no significant difference in transmission of DMelSV among selection regimes, though results suggest that the B. cereus selected lines had lower rates of infection by DMelSV. We found …

Less-Than-Expected Weight Loss In Normal-Weight Women Undergoing Caloric Restriction And Exercise Is Accompanied By Preservation Of Fat-Free Mass And Metabolic Adaptations, Karsten Koehler, M. J. De Souza, N. I. Williams

Department of Nutrition and Health Sciences: Faculty Publications

Background/Objectives: Normal-weight women frequently restrict their caloric intake and exercise, but little is known about the effects on body weight, body composition and metabolic adaptations in this population.

Subjects/Methods: We conducted a secondary analysis of data from a randomized controlled trial in sedentary normal-weight women. Women were assigned to a severe energy deficit (SEV: –1062 ± 80 kcal per day; n = 9), a moderate energy deficit (MOD: –633 ± 71 kcal per day; n = 7) or energy balance (BAL; n = 9) while exercising five times per week for 3 months. Outcome variables included changes in body weight, …

Nonprofit Pay In A Competitive Market: Wage Penalty Or Premium?, Christian King, Gregory B. Lewis

Department of Nutrition and Health Sciences: Faculty Publications

Two competing theories argue that the nonprofit sector pays differently: Nonprofit employees may accept lower pay to be able to do meaningful work for a good cause, or they may earn higher pay due to nonprofit organizations’ tax exemptions and weaker incentives to hold down wages. To test these opposing expectations, we use the 2005-2013 American Community Surveys to examine pay differences among registered nurses working for nonprofit, for-profit, and public hospitals. We also test hypotheses that public and nonprofit hospitals have smaller pay disparities by gender, race, and relationship status. We find that pay is highest in nonprofit hospitals, …

Milk Exosomes: Beyond Dietary Micrornas, Janos Zempleni

Department of Nutrition and Health Sciences: Faculty Publications

Extracellular vesicles deliver a variety of cargos to recipient cells, including the delivery of cargos in dietary vesicles from bovine milk to non-bovine species. The rate of discovery in this important line of research is slowed by a controversy whether the delivery and bioactivity of a single class of vesicle cargos, microRNAs, are real or not. This opinion paper argues that the evidence in support of the bioavailability of microRNAs encapsulated in dietary exosomes outweighs the evidence produced by scholars doubting that phenomenon is real. Importantly, this paper posits that the time is ripe to look beyond microRNA cargos and …

Role Of Oxygen Free Radicals, Nitric Oxide And Mitochondria In Mediating Cardiac Alterations During Liver Cirrhosis Induced By Thioacetamide, G. Jayakumar Amirtharaj, Sathish Kumar Natarajan, Anna Pulimood, K. A. Balasubramanian, Aparna Venkatraman, Anup Ramachandran

Department of Nutrition and Health Sciences: Faculty Publications

Thioacetamide (TAA) administration is widely used for induction of liver cirrhosis in rats, where reactive oxygen radicals (ROS) and nitric oxide (NO) participate in development of liver damage. Cardiac dysfunction is an important complication of liver cirrhosis, but the role of ROS or NO in cardiac abnormalities during liver cirrhosis is not well understood. This was investigated in animals after TAA-induced liver cirrhosis and temporal changes in oxidative stress, NO and mitochondrial function in the heart evaluated. TAA induced elevation in cardiac levels of nitrate before development of frank liver cirrhosis, without gross histological alterations. This was accompanied by an …

Evaluation Of A Dietary Screener: The Mediterranean Eating Pattern For Americans Tool, L. A. Cerwinske, Heather Rasmussen, S. Lipson, A. S. Volgman, Christy C. Tangney

Department of Nutrition and Health Sciences: Faculty Publications

Background: Evidence exists for an association between accordance with a Mediterranean diet pattern and slower rates of cognitive decline. However, an ‘Americanized’ version of the Mediterranean diet screener is needed to assess accordance in the USA. Thus, the Mediterranean Eating Pattern for Americans (MEPA) tool was developed to assess accordance with a Mediterranean-like food pattern when time is limited. The present study aimed to determine whether the MEPA screener captured the key elements of the Mediterranean diet compared to the more comprehensive food frequency questionnaire (FFQ).

Methods: The study comprised a cross-sectional study in which 70 women completed both the …

Variation In Δ15N And Δ13C Values Of Forages For Arctic Caribou: Effects Of Location, Phenology And Simulated Digestion, Lindsay L. Vansomeren, Perry S. Barboza, David D. Gustine, M. Syndonia Bret-Harte

United States Geological Survey: Staff Publications

RATIONALE: The use of stable isotopes for dietary estimates of wildlife assumes that there are consistent differences in isotopic ratios among diet items, and that the differences in these ratios between the diet item and the animal tissues (i.e., fractionation) are predictable. However, variation in isotopic ratios and fractionation of δ¹³C and δ¹⁵N values among locations, seasons, and forages are poorly described for arctic herbivores especially migratory species such as caribou (Rangifer tarandus).

METHODS: We measured the δ¹³Cand δ¹⁵N values of seven species of forage growing along a 200-km …

Effects Of Crop Type And Harvest On Nest Survival And Productivity Of Dickcissels In Semi-Natural Grasslands, Tara J. Conkling, Jerrold L. Belant, Travis L. Devault, James A. Martin

United States Department of Agriculture Wildlife Services: Staff Publications

Recent focus on climate change and global energy production has increased interest in developing biofuels including perennial native grasses (e.g. switchgrass [Panicum virgatum]) as viable energy commodities while simultaneously maintaining ecosystem function and biodiversity. However, there is limited research examining the effects of biofuel-focused grasslands on grassland bird reproductive success and conservation. In 2011–2013 we studied the effects of vegetation composition and harvest regimens of switchgrass monocultures and native warm-season grass (NWSG) mixtures on nest success, nest density, and productivity for dickcissels (Spiza americana) in Clay Co. MS, USA. There was no effect of vegetation metrics, …

Uncovering Behavioural States From Animal Activity And Site Fidelity Patterns, Peter J. Mahoney, Julie K. Young

United States Department of Agriculture Wildlife Services: Staff Publications

1. Space use by animals has important implications for individual fitness. However, resource requirements often vary throughout the course of a lifetime and are a reflection of the demands associated with daily tasks or specific life-history phases, from food acquisition to reproduction, and emphasize the need to classify resource selection relative to specific behavioural states. Site fidelity is often indicative of behaviours important for individual maintenance (e.g. foraging), species’ life history (e.g. seasonal site selection), social communication (e.g. scent-marking) and species interactions (e.g. predation, competition). Thus, resolving site fidelity patterns associated with key behaviours is essential to accurately quantify behavioural-dependent …

Temporal Development Of Gut Microbiota In Triclocarban Exposed Pregnant And Neonatal Rats, Rebekah C. Kennedy, Russell R. Fling, Michael S. Robeson, Arnold M. Saxton, Robert L. Donnell, John L. Darcy, David A. Bemis, Jiang Liu, Ling Zhao, Jiangang Chen

United States Department of Agriculture Wildlife Services: Staff Publications

Alteration of gut microbial colonization process may influence susceptibility of the newborn/infant to infectious and chronic disease. Infectious disease risk leads to widespread use of non-prescription antimicrobials in household products such as Triclocarban (TCC), an antimicrobial compound in personal care products. TCC concentrates in and is transferred through the milk to suckling offspring. TCC exposure during gestation and lactation significantly reduced phylogenetic diversity (PD) among exposed dams and neonates. Among dams using weighted UniFrac distances, TCC induced significant dysbiosis of gut microbiota by gestational day (GD) 18, a trend that continued after delivery. Similarly, an overall restructuring of gut microbiota …

Diazacon Reduces Black-Tailed Prairie Dog Reproduction In Colorado, Christi A. Yoder, Richard E. Mauldin, James P. Gionfriddo, Kenneth A. Crane, David A. Goldade, Richard M. Engeman

United States Department of Agriculture Wildlife Services: Staff Publications

Context. Black-tailed prairie dogs (Cynomus ludovicianus) often come into conflict with humans in urban natural areas adjacent to private property by destroying plants and denuding the landscape. There is a diversity of attitudes related to urban prairie dog management in Colorado and interest in non-lethal methods is increasing. Therefore, the development of non-lethal methods that allow the existence of prairie dogs and mitigate damage related to population density is needed.

Aims. The efficacy of DiazaCon (20,25-diazacholesterol dihydrochloride, a cholesterol analogue) as an oral contraceptive bait for reducing reproduction in black-tailed prairie dogs was tested. Persistence of DiazaCon in …

Organ Weights And Histopathology Of Double-Crested Cormorants (Phalacrocorax Auritus) Dosed Orally Or Dermally With Artificially Weathered Mississippi Canyon 252 Crude Oil, K. E. Harr, Drury R. Reavill, Steven J. Bursian, Dave Cacela, Fred L. Cunningham, Karen M. Dean, Brian S. Dorr, Katie C. Hanson-Dorr, Kate Healy, Katherine E. Horak, Jane E. Link, Susan A. Shriner, Robert E. Schmidt

United States Department of Agriculture Wildlife Services: Staff Publications

A series of toxicity tests were conducted to assess the effects of low to moderate exposure to artificially weathered Deepwater Horizon Mississippi Canyon 252 crude oil on representative avian species as part of the Natural Resource Damage Assessment. The present report summarizes effects of oral exposure (n=26) of double crested cormorants (DCCO; Phalacrocorax auritus) to 5 or 10 ml oil kg⁻¹ day⁻¹ for up to 21 days or dermal application (n=25) of 13 ml oil to breast and back feathers every three days totaling 6 applications in 21 days on organ weights and histopathology. Absolute and relative …

Chemical Repellents, Scott J. Werner, Michael L. Avery

United States Department of Agriculture Wildlife Services: Staff Publications

Agricultural depredations caused by blackbirds can be managed with various lethal and nonlethal methods, including chemical repellents. For many people, nonlethal chemical repellents represent an appealing approach to managing crop depredation because the depredating birds are targeted but not killed; they are just inconvenienced. An effective repellent application can cause the crop-depredating birds to leave their present feeding site and seek food elsewhere. Where the birds go to feed is immaterial to the producer as long as the birds leave the producer's field. Thus, an effective repellent application will not likely affect the overall size of the blackbird population, but …

Toxic Effects Of Orally Ingested Oil From The Deepwater Horizon Spill On Laughing Gulls, Katherine E. Horak, Steven J. Bursian, C. K. Ellis, K. M. Dean, J. E. Link, Katie C. Hanson-Dorr, F. L. Cunningham, K. E. Harr, C. A. Pritsos, Karen L. Pritsos, Katherine A. Healy, Dave Cacela, S. A. Shriner

United States Department of Agriculture Wildlife Services: Staff Publications

The explosion of the Deepwater Horizon oil rig released millions of gallons of oil into the environment, subsequently exposing wildlife, including numerous bird species. To determine the effects of MC252 oil to species relevant to the Gulf of Mexico, studies were done examining multiple exposure scenarios and doses. In this study, laughing gulls (Leucophaeus atricilla, LAGU) were offered fish injected with MC252 oil at target doses of 5 or 10 mL/kg bw per day. Dosing continued for 27 days. Of the adult, mixed-sex LAGUs used in the present study, 10 of 20 oil exposed LAGUs survived to the …

Space Use And Social Ecology Of Coyotes (Canis Latrans) In A High-Elevation Ecosystem: Relative Stability In A Changing Environment, Suzanne J. Gifford, Eric M. Gese, Robert R. Parmenter

United States Department of Agriculture Wildlife Services: Staff Publications

Coyote (Canis latrans) spatial and social ecology are variable, but have been little studied in high-elevation environments. In these temperate ecosystems, large ungulates are prevalent and coyote pack size may be large in order for them to scavenge and defend ungulate carcasses from conspecifics in neighboring packs. We initiated a study to understand the spatial and social ecology of coyotes on the Valles Caldera National Preserve, a high-elevation (2450–3400 m) protected area in northern New Mexico. Our objectives were to (1) describe the home range size and habitat use of coyotes in the preserve, (2) describe coyote movements …

Testing Of An Oral Dosing Technique For Double-Crested Cormorants, Phalacocorax Auritus, Laughing Gulls, Leucophaeus Atricilla, Homing Pigeons, Columba Livia, And Western Sandpipers, Calidris Mauri, With Artificially Weather Mc252 Oil, Karen M. Dean, Dave Cacela, Michael W. Carney, F. L. Cunningham, C. Ellis, A. R. Gerson, C. G. Guglielmo, Katie C. Hanson-Dorr, K. E. Harr, Katherine A. Healy, Katherine E. Horak, John P. Isanhart, L. V. Kennedy, J. E. Link, I. Lipton, Andrew K. Mcfadden, J. K. Moye, C. R. Perez, C. A. Pritsos, Karen L. Pritsos, Thivanka Muthumalage, S. A. Shriner, S. J. Bursian

United States Department of Agriculture Wildlife Services: Staff Publications

Scoping studies were designed to determine if double-crested cormorants (Phalacocorax auritus), laughing gulls (Leucophaues atricilla), homing pigeons (Columba livia) and western sandpipers (Calidris mauri) that were gavaged with a mixture of artificially weathered MC252 oil and food for either a single day or 4–5 consecutive days showed signs of oil toxicity. Where volume allowed, samples were collected for hematology, plasma protein electrophoresis, clinical chemistry and electrolytes, oxidative stress and organ weigh changes. Double-crested cormorants, laughing gulls and western sandpipers all excreted oil within 30 min of dose, while pigeons regurgitated within less …

Demographic And Temporal Variations In Immunity And Condition Of Polar Bears (Ursus Maritimus) From The Southern Beaufort Sea, Lorin A. Neuman-Lee, Patricia A. Terletzky, Todd C. Atwood, Eric M. Gese, Geoffrey D. Smith, Sydney Greenfield, John Pettit, Susannah S. French

United States Department of Agriculture Wildlife Services: Staff Publications

Assessing the health and condition of animals in their natural environment can be problematic. Many physiological metrics, including immunity, are highly influenced by specific context and recent events to which researchers may be unaware. Thus, using a multifaceted physiological approach and a context-specific analysis encompassing multiple time scales can be highly informative. Ecoimmunological tools in particular can provide important indications to the health of animals in the wild.We collected blood and hair samples from free-ranging polar bears (Ursus maritimus) in the southern Beaufort Sea and examined the influence of sex, age, and reproductive status on metrics of immunity, …

Coyote Removal: Can The Short-Term Application Of A Controversial Management Tool Improve Female Greater Sage-Grouse Survival Or Nest Success?, Elizabeth K. Orning, Julie K. Young

United States Department of Agriculture Wildlife Services: Staff Publications

Greater sage-grouse Centrocercus urophasianus have declined across western North America, intensifying the need for ecological research that enhances management and conservation goals. Predator–prey interactions can have widespread ecological effects but there is a paucity of information about predator effects on sage-grouse ecology. During a two-year study from 2011–2012, we modified the existing framework designed for predator management to test the effects of coyote Canis latrans removal on female sage-grouse survival and nest success in the Bighorn Basin of Wyoming, USA, where coyotes were found to be the dominant predator. We used VHF radio-telemetry to monitor female survival and locate nests …

Attractants For Wild Pigs: Current Use, Availability, Needs, And Future Potential, Michael J. Lavelle, Nathan P. Snow, Justin W. Fischer, Joe M. Halseth, Eric H. Vannatta, Kurt C. Vercauteren

United States Department of Agriculture Wildlife Services: Staff Publications

Populations of wild pigs (Sus scrofa) are burgeoning around the globe, and they are currently the target of extensive research and management efforts.Wild pigs are a highly successful invasive species that cause extensive damage to agriculture and native plant and animal communities. Lethal control is the most common management strategy used to reduce wild pig populations and their damage, and many lethal strategies rely on luring wild pigs to a specific location. Most commonly, a food commodity such as corn or maize (Zea mays) is used for attracting wild pigs to a site, but baiting with …

Characterizing The Diversity Of Sweetpotato Through Growth Parameters And Leaf Traits: Precocity And Light Use Efficiency As Important Ordination Factors, D. A. Ramírez, C. Gavilán, C. Barreda, B. Condori, G. Rossel, R. O. M. Mwanga, M. Andrade, P. Monneveux, N. L. Anglin, D. Ellis, R. Quiroz

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

Due to its low-input requirements, high yield capacity in marginal soils, and high carbohydrate and vitamin A content, sweetpotato is an important food security crop. For effective breeding strategies, knowing and understanding the traits that drive diversity among varieties is required. In this study, a set representing the diversity of sweetpotato varieties was characterized through multivariate ordination based on growth parameters and physiological leaf traits. The dynamic of light interception, light use efficiency (LUE) parameters, and partition of assimilates to the storage roots of eight representative varieties were simulated through a crop growth model. Leaf mass per area (LMA), N …

Serologic Evidence Of Various Arboviruses Detected In White Tailed Deer (Odocoileus Virginianus) In The United States, Kerri Pedersen, Eryu Wang, Scott C. Weaver, Paul C. Wolf, Adam R. Randall, Kyle R. Van Why, Amelia P.A. Travassos Da Rosa, Thomas Gidlewski

United States Department of Agriculture Wildlife Services: Staff Publications

White-tailed deer (Odocoileus virginianus) are an abundant mammal with a wide geographic distribution in the United States, which make them good sentinels for monitoring arboviral activity across the country. Exposure to various arboviruses has been detected in white-tailed deer, typically in conjunction with another diagnostic finding. To better assess the exposure of white-tailed deer to seven arboviruses, wetested 1,508 sera collected from 2010 to 2016 for antibodies to eastern equine encephalitis (2.5%), Powassan (4.2%), St. Louis encephalitis, (3.7%), West Nile (6.0%), Maguari (19.4%), La Crosse (30.3%), and bluetongue (7.8%) viruses. At least one arbovirus was detected in 51.3%, …

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

United States Department of Agriculture Wildlife Services: Staff Publications

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

A Real-Time Pcr Assay For Accurate Quantification Of The Individual Members Of The Altered Schaedler Flora Microbiota In Gnotobiotic Mice, João Carlos Gomez-Neto, Sara Mantz, Kyler Held, Rohita Sinha, Rafael R. Segura Munoz, Robert Schmaltz, Andrew K. Benson, Jens Walter, Amanda E. Ramer-Tait

Department of Food Science and Technology: Faculty Publications

Changes in the gastrointestinal microbial community are frequently associated with chronic diseases such as Inflammatory Bowel Diseases. However, understanding the relationship of any individual taxon within the community to host physiology is made complex due to the diversity and individuality of the gut microbiota. Defined microbial communities such as the Altered Schaedler Flora (ASF) help alleviate the challenges of a diverse microbiota by allowing one to interrogate the relationship between individual bacterial species and host responses. An important aspect of studying these relationships with defined microbial communities is the ability to measure the population abundance and dynamics of each member. …

Endurance Exercise Increases Intestinal Uptake Of The Peanut Allergen Ara H 6 After Peanut Consumption In Humans, Lonneke M. Janssenduijghuijsen, Klaske Van Norren, Sander Grefte, Stef J. Koppelman, Kaatje Lenaerts, Jaap Keijer, Renger F. Witkamp, Harry J. Wichers

Department of Food Science and Technology: Faculty Publications

Controlled studies on the effect of exercise on intestinal uptake of protein are scarce and underlying mechanisms largely unclear. We studied the uptake of the major allergen Ara h 6 following peanut consumption in an exercise model and compared this with changes in markers of intestinal permeability and integrity. Ten overnight-fasted healthy non-allergic men (n = 4) and women (n = 6) (23 +/- 4 years) ingested 100 g of peanuts together with a lactulose/rhamnose (L/R) solution, followed by rest or by 60 min cycling at 70% of their maximal workload. Significantly higher, though variable, levels of Ara h 6 …

Breeding For Biomass Yield In Switchgrass Using Surrogate Measures Of Yield, Michael D. Casler, Guillaume P. Ramstein

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

Development of switchgrass (Panicum virgatum L.) as a dedicated biomass crop for conversion to energy requires substantial increases in biomass yield. Most efforts to breed for increased biomass yield are based on some form of indirect selection. The objective of this paper is to evaluate and compare the expected efficiency of several indirect measures of breeding value for improving sward-plot biomass yield of switchgrass. Sward-plot biomass yield, row-plot biomass, and spaced-plant biomass were measured on 144 half-sib families or their maternal parents from the WS4U-C2 breeding population of upland switchgrass. Heading date was also scored on row plots and …

Tracking Bacteria Through The Entire Gastrointestinal Tract Of A Beef Steer, Lisa M. Durso, Daniel N. Miller, Ty B. Schmidt, Todd Callaway

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

Biological processes within beef cattle gastrointestinal tracts (GIT) influence animal health, and the output (feces) is an important vector for zoonotic pathogens and antibiotic resistant bacteria. Historically, outside of the rumen, little attention was paid to the bacteria along the GIT, despite their essential role in catabolizing feed into feces. Here we characterize bacteria from 15 GIT sites within a beef steer and examine the proportion of bacteria contributed by upstream compartments. This animal displayed characteristic differences between tissue and digesta communities in gastric and large-intestine, but not small-intestine, samples. The GIT sites shared between 50 and 80% of the …

Spatial And Temporal Changes In Maize And Soybean Grain Yield, Precipitation Use Efficiency, And Crop Water Productivity In The U.S. Great Plains, Meetpal S. Kukal, S. Irmak

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Sustainable agricultural utilization of the limited water resources demands improvements in understanding the changes in crop water productivity (CWP) in space and time, which is often presented as a potential solution to relieve the growing pressure on fresh water resources. In addition, crop yield needs to be studied in relation to precipitation received annually and during the growing season for its contribution to reduce irrigation water requirements, which is quantified through precipitation use efficiency (PUE). Hence, systematic quantifications, mapping, and analyses of large-scale CWP and PUE levels are needed. This study aims to quantify long-term (1982-2013) information on grain yield, …

Guidelines For Successful Gamebird And Songbird Feeding, C. Sánchez García, Francis Buner

Galliformes Specialist Group and Affiliated Societies: Reports and Other Materials

The key points of this research are:

• We studied the use of 259 feeders by wildlife using camera traps during early and late winter in 2012 and 2013, taking over 160,000 photographs.
• We worked on three farms in southern England where pheasants, grey and red-legged partridges were present and feeding was part of the existing game management programme.
• We used a feeder model consisting of a spiral feed dispenser attached to the bottom of a drum, suspended within a cylindrical iron armature clad with wire sheep netting.

Nutr 356: Nutrition Education In The Community—A Peer Review Of Teaching Project Benchmark Portfolio, Virginia Chaidez

UNL Faculty Course Portfolios

This course portfolio summarizes a thoughtful documentation of a peer review process of teaching for an undergraduate course in community nutrition. The portfolio provides my description of the course and course goals utilizing the 'Backwards Design' approach; a reflection of teaching methods and activities used to enhance learning and reach course goals; an analysis of teaching activities at the end of the semester and planned changes for teaching this course moving forward.

Effect Of Backgrounding Management Strategies On The Performance And Profitability Of Yearling Beef Cattle, Cody Alan Welchons

Department of Animal Science: Dissertations, Theses, and Student Research

Performance and profitability of steers grazing smooth bromegrass during the summer was evaluated. Steers grazed bromegrass with no supplement (CON), grazed bromegrass fertilized with 90 kg N/ha (FERT), or grazed bromegrass and were supplemented with distillers grains plus solubles (DGS) at 0.6% of BW (SUPP). Supplemented steers had increased ADG compared to CON and FERT steers. Profitability was greatest for the SUPP steers due to increased ending BW at the end of the grazing season. Steers grazing fertilized pastures were more profitable than CON steers due to increased stocking rate as a result of improved forage growth.

A 2-yr study …