Animal & Range Sciences
The curricula in animal science provide students with a firm foundation in the biological and natural sciences, animal breeding, reproductive physiology, nutrition, and livestock production and management. Natural Resources & Rangeland Ecology focuses on managing the interaction of livestock, and wildlife and their rangeland habitats. Emphasis is placed on soil, water and vegetation attributes which influence habitat ecology and management of livestock and wildlife.
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Suppression force-fields and diffuse competition: competition de-escalation is an evolutionarily stable strategy
(The Royal Society, 2023-08)Competition theory is founded on the premise that individuals benefit from harming their competitors, which helps them secure resources and prevent inhibition by neighbours. When multiple individuals compete, however, ... -
Conceptualization and implementation of the Fiber Utilization and Cell Wall Constituents Symposium
(Oxford University Press, 2023-01)Understanding how ruminants break down plant cell walls and digest plant fibers can help improve the efficiency of livestock production -
Molecular Pathways for Muscle and Adipose Tissue Are Altered between Beef Steers Classed as Choice or Standard
(MDPI AG, 2023-06)Targets for finished livestock are often determined by expected fat, either subcutaneous or intramuscular. These targets are used frequently to improve eating quality. Lower intramuscular fat, lack of product uniformity, ... -
Residual effect of narasin on feed intake and rumen fermentation characteristics in Nellore steers fed forage-based diet
(Oxford University Press, 2023-01)This study aimed to evaluate the residual effect of narasin on intake and ruminal fermentation parameters in Nellore cattle fed a forage-based diet. Thirty rumen-cannulated Nellore steers [initial body weight (BW) = 281 ± ... -
Effects of lasalocid, narasin, or virginiamycin supplementation on rumen parameters and performance of beef cattle fed forage-based diet
(Oxford University Press, 2023-04)Two experiments were designed to evaluate the impacts of supplementing lasalocid (LAS), narasin (NAR), or virginiamycin (VRM) on rumen fermentation parameters, apparent nutrient digestibility, and blood parameters (Exp. ... -
Different combinations of monensin and narasin on growth performance, carcass traits, and ruminal fermentation characteristics of finishing beef cattle
(Frontiers Media SA, 2023-04)The objective of this study was to evaluate the effects of different combinations of monensin and narasin on finishing cattle. In Exp. 1, 40 rumen-cannulated Nellore steers [initial body weight (BW) = 231 ± 3.64 kg] were ... -
Associations among the genome, rumen metabolome, ruminal bacteria, and milk production in early-lactation Holsteins
(Elsevier, 2023-03)A multicenter observational study to evaluate genome-wide association was conducted in early-lactation Holstein cows (n = 293) from 36 herds in Canada, the USA, and Australia. Phenotypic observations included rumen metabolome, ... -
Characterizing ruminal acidosis risk: A multiherd, multicountry study
(Elsevier, 2023-03)A multicenter observational study was conducted on early lactation Holstein cows (n = 261) from 32 herds from 3 regions (Australia, AU; California, CA; and Canada, CAN) to characterize their risk of acidosis into 3 groups ... -
Influences of increasing levels of sulfate in drinking water on the intake and use of low-quality forages by beef cattle
(American Registry of Professional Animal Scientists, 2023-02)Objective. This study evaluated the effects of varying sulfate concentrations of water on forage and water intake, digestibility, digestive kinetics, and rumen fermentation characteristics of cattle consuming low-quality ... -
Evaluating the Cumulative Effects of Livestock Grazing on Wildlife With an Integrated Population Model
(Frontiers Media SA, 2022-05)Livestock grazing can shape temperate grassland ecosystems, with both positive and negative effects on wildlife documented depending on a variety of grazing and site factors. Historically, research investigating the impacts ... -
Perceived Stress and Molecular-BV in the NIH Longitudinal Study of Vaginal Flora
(Oxford University Press, 2021-05)Vaginal microbiota provide the first line of defense against urogenital infections primarily through protective actions of Lactobacillus spp. Perceived stress increases susceptibility to infection through several mechanisms, ... -
Biogenic Amines Increase the Odds of Bacterial Vaginosis and Affect the Growth of and Lactic Acid Production by Vaginal Lactobacillus spp.
(American Society for Microbiology, 2021-04)Bacterial vaginosis (BV) is the most common vaginal disorder of reproductive-aged women, yet its etiology remains enigmatic. One clinical symptom of BV, malodor, is linked to the microbial production of biogenic amines ... -
Bacterial communities in the rumen and feces of lactating Holstein dairy cows are not affected when fed reduced-fat dried distillers’ grains with solubles
(Elsevier BV, 2021-07)Reduced-fat dried distillers’ grains with solubles (RF-DDGSs) are co-products of ethanol production and contain less fat than traditional distillers’ grains. The fat in corn is ~91% unsaturated, and it is toxic to rumen ... -
Relationships among intramammary health, udder and teat characteristics, and productivity of extensively managed ewes
(Oxford University Press, 2021-02)Mastitis is an economically important disease and its subclinical state is difficult to diagnose, which makes mitigation more challenging. The objectives of this study were to screen clinically healthy ewes in order to 1) ... -
In Vivo Competitions between Fibrobacter succinogenes, Ruminococcus flavefaciens, and Ruminoccus albus in a Gnotobiotic Sheep Model Revealed by Multi-Omic Analyses
(American Society for Microbiology, 2021-04)Ruminant animals, including cattle and sheep, depend on their rumen microbiota to digest plant biomass and convert it into absorbable energy. Considering that the extent of meat and milk production depends on the efficiency ... -
Evaluating the effects of finishing diet and feeding location on sheep performance, carcass characteristics, and internal parasites
(Korean Society of Animal Science and Technology, 2021-05)A 3 yr experiment was conducted to evaluate the influence of diet and feeding location on animal performance, carcass characteristics, whole blood counts, and internal parasite burden of lambs assigned to 1 of 4 treatments: ... -
Direct Phenotyping and Principal Component Analysis of Type Traits Implicate Novel QTL in Bovine Mastitis through Genome-Wide Association
(MDPI AG, 2021-04)Our objectives were to robustly characterize a cohort of Holstein cows for udder and teat type traits and perform high-density genome-wide association studies for those traits within the same group of animals, thereby ... -
Identification of Genomic Regions for Carcass Quality Traits within the American Simmental Association Carcass Merit Program
(MDPI, 2021-02)USDA quality and yield grade are primary driving forces for carcass value in the United States. Carcass improvements can be achieved by making selection decisions based on the results of genetic evaluations in the form of ... -
Differential haptoglobin responsiveness to a Mannheimia haemolytica challenge altered immunologic, physiologic, and behavior responses in beef steers
(Oxford University Press, 2021-01)Indicator traits associated with disease resiliency would be useful to improve the health and welfare of feedlot cattle. A post hoc analysis of data collected previously (Kayser et al., 2019a) was conducted to investigate ... -
Impacts of Bovine Trace Mineral Supplementation on Maternal and Offspring Production and Health
(MDPI AG, 2020-12)Nutritional status can have major implications for animal health and production. Energy balance is easily determined using a body condition scoring system. This allows producers to readily adjust diets to meet an animal’s ...
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