A5047614477- Reproductive Physiology in Livestock
- Ruminant Nutrition and Digestive Physiology
- Genetic and phenotypic traits in livestock
- Birth, Development, and Health
- Effects of Environmental Stressors on Livestock
- Pregnancy and preeclampsia studies
- Selenium in Biological Systems
- Metabolism and Genetic Disorders
- Animal Nutrition and Physiology
- Folate and B Vitamins Research
- Gestational Diabetes Research and Management
- Animal Nutrition and Health
- Gut microbiota and health
- Food Security and Health in Diverse Populations
- Animal Behavior and Welfare Studies
- Turfgrass Adaptation and Management
- Growth Hormone and Insulin-like Growth Factors
- Animal health and immunology
- Cannabis and Cannabinoid Research
- Cancer-related molecular mechanisms research
- Microbial infections and disease research
- Indigenous Studies and Ecology
- Alcohol Consumption and Health Effects
- Reproductive System and Pregnancy
- Rangeland and Wildlife Management
Agricultural Research Service
2022-2024
Roman L. Hruska U.S. Meat Animal Research Center
2022-2024
United States Department of Agriculture
2024
North Dakota State University
2012-2023
Carrington College
2018-2023
Dakota State University
2011-2022
Agriculture and Agri-Food Canada
2022
Medical University of South Carolina
2002
Abstract A growing number of studies have investigated the feasibility utilizing hemp by-products as livestock feedstuffs; however, their impact on microbiomes remains unexplored. Here, we evaluated effects feeding hempseed cake gastrointestinal, respiratory, and reproductive microbiota in beef heifers. Angus-crossbred heifers (19-months old, initial body weight = 494 ± 10 kg [SE]) were fed a corn-based finishing diet containing 20% substitute for corn dried distillers’ grains with solubles...
Abstract We examined the hypothesis that maternal nutrition and day of gestation would affect concentrations AAs hexoses in bovine utero-placental fluids serum from days 16 to 50 gestation. Forty-nine cross-bred Angus heifers were bred via artificial insemination fed a control diet (CON = 100% requirements for growth) or restricted (RES 60% CON) ovariohysterectomized on 16, 34, gestation; nonpregnant controls not synchronized estrous cycle. The resulting design was completely randomized with...
Thirty-two crossbred heifers were fed either a control diet or 20% (dry matter basis) hempseed cake in complete ration for 111 days; of the cattle cake, four each harvested with 0, 1, 4, and 8-day withdrawal periods. Urine plasma collected during feeding periods liver, kidney, skeletal muscle, adipose tissue at harvest. Total cannabinoid (n = 10) concentration averaged 11.3 ± 11.7 mg kg-1 across period total cannabidiol tetrahydrocannabinol (CBD/THC) concentrations 1.3 0.8 kg-1. Neutral...
Limited data are available regarding the influence of thiamine supplementation on incidence polioencephalomalacia (PEM) in lambs fed diets containing increased concentrations S diet (>0.7%). Therefore, our objective was to evaluate feedlot performance, carcass quality, ruminal hydrogen sulfide gas concentrations, and PEM a finishing 60% distillers dried grains with solubles (DDGS; DM basis). Two studies were conducted using completely randomized designs concentration supplementation. Study 1...
Abstract Five ruminally and duodenally cannulated red angus steers (n = 5; initial body weight [BW] 542 kg, SD 40 kg) were used in a three-period Youden square design consisting of three 21-d periods, treatments, five (one or two per treatment within each period) to evaluate the effect feeding hempseed cake on ruminal fermentation parameters, organic matter (OM) intake, total tract nutrient digestion, nitrogen (N) balance fed finishing diets. The control (CON) diet contained 75% dry-rolled...
Abstract Adequate maternal nutrition is key for proper fetal development and epigenetic programming. One-carbon metabolites (OCM), including vitamin B12, folate, choline, methionine, play a role in mechanisms associated with developmental This study investigated the presence of B12 folate serum, allantoic fluid (ALF), amniotic (AMF), as well how those concentrations all three fluids correlate to methionine–folate cycle intermediates heifers receiving either control (CON) or restricted (RES)...
We hypothesized that GnRH would increase pregnancy risk (PR) in a split-time AI program for cows which estrus was not detected. A total of 1,236 suckled beef at 12 locations 3 states (Colorado, Kansas, and North Dakota) were enrolled. Before applying the fixed-time program, BCS assessed. Cows treated on d -7 with progesterone insert concurrent 100 μg 0 25 mg PGF plus removal insert. Estrus-detection patches affixed to removal. Estrus defined have occurred when an estrus-detection patch >50%...
We hypothesized that a standing flank ovariohysterectomy procedure could be developed in beef heifers would provide high quality tissues for addressing critical questions during early pregnancy, while concomitantly keeping livestock stewardship priority. To test the hypothesis, we: 1) use heifers, and 2) implemented this cohort of up to d 50 pregnancy tissue collections, documentation post-surgical recovery, assessment feedlot finishing performance. Ovariectomy cesarean section protocols are...
Abstract As the hemp industry continues to develop in United States, there is an increasing interest feeding byproducts of industrial production livestock. A completely randomized design experiment using crossbred finishing heifers (initial body weight [BW] ± SE = 494 10 kg) was conducted determine effects hempseed cake a corn-based diet (10% forage) formulated meet or exceed ruminally degradable and metabolizable protein requirements on growth performance, carcass characteristics, behavior,...
As in-feed antibiotics are phased out of swine production, producers seeking alternatives to facilitate improvements in growth typically seen from this previously common feed additive.
The objective of this study was to determine the dose-dependent response one-carbon metabolite (OCM: methionine, choline, folate, and vitamin B12) supplementation on heifer dry matter intake fixed gain, organ mass, hematology, cytokine concentration, pancreatic jejunal enzyme activity, muscle hydrogen peroxide production. Angus heifers (n = 30; body weight [BW] 392.6 ± 12.6 kg) were individually fed assigned one five treatments: 0XNEG: total mixed ration (TMR) saline injections at days 0 7...
Four ruminally and duodenally cannulated beef steers (388 ± 12 kg) were used to evaluate effects of advancing season on forage quality, intake, site digestion, microbial efficiency while grazing mixed-grass prairie in western North Dakota. Five 11-d sample collections conducted from late June mid-November. Chromic oxide (8 g) was dosed twice daily at 0700 1900 h via gelatin capsule d 2 11 each collection period, duodenal fecal performed 7 11. Masticate samples collected for sampling period....
We hypothesized that maternal nutrition and day of gestation would impact utero-placental mRNA expression the nutrient transporters GLUT1, GLUT5, CAT-1, CAT-2, CAT-3 in beef heifers. Crossbred Angus heifers (n = 49) were estrous synchronized, bred via AI, assigned to nutritional treatment (CON 100% NRC requirements for 0.45 kg/d gain RES 60% CON) ovariohysterectomized on d 16, 34, or 50 6 9/d); Non-bred, non-pregnant (NB-NP) controls fed CON diet, not bred, 16 synchronized cycle 6). The...
Abstract The objective of this study was to determine the dose folate and vitamin B12 in beef heifers fed rumen protected methionine choline required maintain increased levels intermediates methionine-folate cycle circulation. Angus (n = 30; BW 392.6 ± 12.6 kg) were individually assigned one five treatments: 0XNEG: Total mixed ration (TMR) saline injections at day 0 7 estrous cycle, 0XPOS: TMR, (MET) 0.08% diet DM, (CHOL) 60 g/d, 7, 0.5X: MET, CHOL, 5 mg B12, 80 1X: MET 10 160 2X: 20 320 7....
Abstract We hypothesized that maternal nutrient restriction starting at the time of breeding would influence placental vascular development and gene expression angiogenic factors during first 50 d gestation in beef heifers. Commercial Angus crossbred heifers (n = 49) were maintained on a total mixed ration supplemented with dried distillers grains solubles. All subject to 5-d CO-Synch + CIDR estrous synchronization protocol, AI single sire, randomly assigned dietary treatments. One half...
We hypothesized that both day of gestation and maternal nutrition would alter the relative mRNA expression neutral acid AA transporters , . Crossbred Angus heifers ( = 49) were synchronized, bred via AI, assigned to nutritional treatment (100% NRC requirements for 0.45 kg/d gain [control {CON}] 60% CON [restricted {RES}]), ovariohysterectomized on d 16, 34, or 50 6 9/d). Nonbred, nonpregnant (NB-NP) controls 16 estrous cycle 6) after synchronization. The resulting arrangement was a 2 × 3...
Glucose transporter solute carrier family 2 member 14 () is a duplicon of glucose 3 with 95% shared homology to and has not previously been isolated in ruminant uteroplacental tissues. The Holstein heifer uterine epithelium but ovine epithelium. We hypothesized that its would be found bovine tissues maternal nutrition day gestation impact mRNA expression . Crossbred Angus heifers ( = 49) were estrus synchronized, bred via AI, assigned nutritional treatment (CON 100% requirements gain 0.45...
Abstract We hypothesized that maternal nutrition and day of gestation would influence the abundance neutral amino acid transporters SLC1A1, SLC1A5, SLC7A5, SLC38A2, SLC38A7 in heifer utero-placental tissues. Angus-cross heifers (n = 43) were estrus synchronized bred via AI. At breeding, assigned to one two dietary intake groups (CON 100% requirements achieve 0.45 kg/d gain or restricted (RES) 60% CON intake) ovariohysterectomized on 16, 34, 50 6 9/d). Thus, experimental design was a...
Feeding increased concentrations of distillers dried grains with solubles (DDGS) to ruminants has been avoided due risks S toxicity and concerns about animal performance. The objective this study was evaluate the influence feeding an increasing concentration DDGS corn processing method on performance, incidence polioencephalomalacia (PEM), H(2)S gas in feedlot steers. Sixty steer calves (336 ± 13.2 kg) were individually fed for average 136 d a completely random design 3 × 2 factorial...