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Articles 661 - 690 of 1392
Full-Text Articles in Animal Sciences
The Jackrabbit Dairy Review, Vikram Mistry
The Jackrabbit Dairy Review, Vikram Mistry
The Jackrabbit Dairy & Food Review
No abstract provided.
Reintroduction Of Bison (Bison Bison) On Reservations In South Dakota: Four Case Studies, Trudy M. Ecoffey
Reintroduction Of Bison (Bison Bison) On Reservations In South Dakota: Four Case Studies, Trudy M. Ecoffey
Electronic Theses and Dissertations
This research explored and documented issues of sustainability associated with the reintroduction of bison in four different bison herds on Reservations in South Dakota. The four herds were managed by: a tribal family cooperative, an individual tribal member, a tribal university and a tribal fish and wildlife agency. The objectives were to identify management practices associated with the sustainability of bison introduction by American Indians; to explore the role of American Indian culture in the management of bison for sustainability; and to investigate rangeland criteria that could be used to measure sustainability of bison reintroduced by American Indians. This project …
Planted Grasslands And Native Sod Prairie: Equivalent Habitat For Grassland Birds, Kristel K. Bakker, Kenneth F. Higgins
Planted Grasslands And Native Sod Prairie: Equivalent Habitat For Grassland Birds, Kristel K. Bakker, Kenneth F. Higgins
Natural Resource Management Faculty Publications
Little is known about how avian relationships to tracts of native sod prairie compare with avian relationships to single and multiple species of cool- and warm-season grassland plantings. We compared grassland bird species richness and density in 5 grassland cover types (n = 97) in the tallgrass prairie region of eastern South Dakota and western Minnesota, 2001–2004. Grassland bird species richness was significantly higher in native sod prairies than it was in all planted cover types except warm-season mixes. Grasslands dominated by exotic species did not support as many grassland bird species or have species densities as high as grasslands …
Performance Characteristics Of Nile Tilapia (Oreochromis Niloticus) Fed Diets Containing Graded Levels Of Fuel-Based Distllers Dried Grains With Solubles, T. W. Schaeffer, M. L. Brown, K. A. Rosentrater
Performance Characteristics Of Nile Tilapia (Oreochromis Niloticus) Fed Diets Containing Graded Levels Of Fuel-Based Distllers Dried Grains With Solubles, T. W. Schaeffer, M. L. Brown, K. A. Rosentrater
Natural Resource Management Faculty Publications
A feeding trial was performed to investigate levels of corn-based Distillers Dried Grains with solubles (DDGS), a co-product of fuel ethanol manufacturing, used as a nutrient source for juvenile Nile tilapia (Oreochromis niloticus). Three isocaloric (15.7±0.7 MJ kg-1 dry matter), isonitrogenous (29.6±1.0% crude protein) experimental diets were formulated to contain 20, 30 and 40% DDGS; a commercial diet containing fishmeal was used as a reference diet. Glass aquaria (110 L) were stocked with Nile tilapia (mean weight = 6.7 g) with four replicates per diet. Weight gains, conversion ratios and hepatosomatic indices did not significantly differ between …
The Jackrabbit Dairy Review, Vikram Mistry
The Jackrabbit Dairy Review, Vikram Mistry
The Jackrabbit Dairy & Food Review
No abstract provided.
The Analysis Of Cyanide And Its Metabolites In Biological Samples, Brian A. Logue, Diane M. Hinkens
The Analysis Of Cyanide And Its Metabolites In Biological Samples, Brian A. Logue, Diane M. Hinkens
Chemistry and Biochemistry Faculty Publications
Cyanide is a toxic chemical that may be introduced to living organisms as a result of both legal and illicit uses of cyanide. Exposure to cyanide can be verifi ed by analyzing cyanide or one of its break-down products from biological samples. This verifi cation is important for medical, law-enforcement, forensic, research, and veterinary purposes. This review will identify common problems associated with the analysis of cyanide and its metabolites, discuss current bioanalytical techniques used for verifi cation of cyanide exposure, and briefl y address the metabolism and toxicokinetics of cyanide and its break-down products in biological systems.
2008 Dairy Digest, South Dakota State University Dairy Club
2008 Dairy Digest, South Dakota State University Dairy Club
Dairy Digest
No abstract provided.
Comparison Of Estradiol-Trenbolone Acetate Implant Programs For Yearling Steers Of Two Genotypes, Robbi H. Pritchard
Comparison Of Estradiol-Trenbolone Acetate Implant Programs For Yearling Steers Of Two Genotypes, Robbi H. Pritchard
South Dakota Beef Report, 2008
Yearling steers (n = 400) were used to evaluate relative payout periods for implants when feeding high grain content diets. Implant treatments included (1) control (nonimplanted), (2) Synovex Plus, (3) revalor-s, and (4) Ralgro-revalor-s. The Synovex Plus (2), revalor-s (3) and Ralgro (4) were administered on day 1. The reimplant with revalor-s (4) was admnistered after 56 d on feed. Steers were managed in two groups. Initial BW and days fed were 782 lb, 131 d (Group I), and 661 lb, 145 d (Group II). Implants increased production rates and efficiencies, increased carcass size and reduced marbling when compared to …
Cottonwood And Antelope Range Livestock Research Stations Unit Report, Kenneth C. Olson
Cottonwood And Antelope Range Livestock Research Stations Unit Report, Kenneth C. Olson
South Dakota Beef Report, 2007
Two research stations, the Cottonwood and Antelope Range Livestock Research Stations, are located in western South Dakota that allow research projects focused on needs of range livestock producers in that region. The stations are comprised primarily of native rangeland that is grazed by cattle at both stations, and also by sheep at Antelope. The philosophy of the research efforts has been focused on conducting applied research to solve problems and address rangeland and livestock management opportunities relevant to the livestock producers and land mangers of the region.
Evaluation Of Mixing Characteristics Of Diets Containing Modified Distillers Grains, Erik R. Loe, Bradley D. Rops, John T. Keimig
Evaluation Of Mixing Characteristics Of Diets Containing Modified Distillers Grains, Erik R. Loe, Bradley D. Rops, John T. Keimig
South Dakota Beef Report, 2007
Six mixes of feed were manufactured and analyzed to determine how sequence of ingredient addition into a feed mixer influences mixing characteristics when modified distillers grains (mDG) was used as a feed ingredient. Five mixes were manufactured using a 3-bar rotor mixer and one mix was manufactured using a staggered-rotor mixer. There were three diet types evaluated: 1) high-forage receiving diet; 2) high-grain finishing diet with ground grass hay (GH) as the roughage source; and 3) high-grain finishing diet with silage as the roughage source. Five samples were collected from each mix and were analyzed for particle size and nutrient …
The Effect Of Gnrh At Time Of Insemination On Initiation Of Lh Pulses And Subsequent Progesterone, Sarah D. Fields, Brandy L. Perry, George A. Perry
The Effect Of Gnrh At Time Of Insemination On Initiation Of Lh Pulses And Subsequent Progesterone, Sarah D. Fields, Brandy L. Perry, George A. Perry
South Dakota Beef Report, 2007
Research has indicated that luteinizing hormone (LH) pulses play a vital role in corpus luteum (CL) formation and subsequent progesterone concentrations. Therefore, our objectives were to determine: 1) when LH pulses begin following onset of estrus, 2) the effect an injection of gonadotropin releasing hormone (GnRH) would have on initiation of LH pulses, and 3) the effect LH pulse initiation had on subsequent plasma progesterone concentrations. Cows were synchronized with the Select Synch + Controlled Internal Drug Releasing device (CIDR) protocol (d -7 100 μg GnRH and CIDR; d 0 25 mg prostaglandin (PG) and removal of CIDR; estrus detected …
Effect Of Supplemental Fat From Dried Distillers Grains With Solubles Or Corn Oil On Cow Performance, Igf-1, Gh, And Nefa Concentrations, Abigail Bartosh, Cody Wright, Aimee Wertz-Lutz, George Perry
Effect Of Supplemental Fat From Dried Distillers Grains With Solubles Or Corn Oil On Cow Performance, Igf-1, Gh, And Nefa Concentrations, Abigail Bartosh, Cody Wright, Aimee Wertz-Lutz, George Perry
South Dakota Beef Report, 2007
Research has demonstrated that supplemental fat and(or) changes in growth hormone (GH) or insulin-like growth factor-1 (IGF-1) concentrations may affect reproductive performance in beef females. Dried distillers grains with solubles (DDGS) contain approximately 10% to 15% fat; however, minimal research to date has investigated DDGS specifically as a supplemental fat source. The objective of this experiment was to investigate whether supplemental fat from either DDGS or raw corn oil impacts cow growth performance and plasma GH, IGF-1, or non-esterified fatty acid (NEFA) concentrations. Sixty open beef cows [body weight (BW) = 553.5 ± 38.7 kg; body condition score (BCS) = …
The Jackrabbit Dairy Review, Vikram Mistry
The Jackrabbit Dairy Review, Vikram Mistry
The Jackrabbit Dairy & Food Review
No abstract provided.
Dairy Digest 2007, South Dakota State University Dairy Club
Dairy Digest 2007, South Dakota State University Dairy Club
Dairy Digest
No abstract provided.
Effects Of Increasing The Energy Density Of A Lactating Ewe Diet By Replacing Grass Hay With Soybean Hulls And Dried Distillers Grains With Solubles, Aimee Wertz-Lutz, Robert Zelinsky, Jeffrey Held
Effects Of Increasing The Energy Density Of A Lactating Ewe Diet By Replacing Grass Hay With Soybean Hulls And Dried Distillers Grains With Solubles, Aimee Wertz-Lutz, Robert Zelinsky, Jeffrey Held
South Dakota Sheep Research Reports, 2006-07
The objective of this experiment was to determine the effects of increasing the energy density of a lactating ewe diet by replacing grass hay (GH) with soybean hulls (SH) and replacing soybean meal (SBM) with dried distillers grains with solubles (DDGS) on ewe body condition, milk production and nutrient composition, and lamb performance. Sixteen 2-year-old ewes were selected based on a common lambing date. All diets contained 60% roughage and 40% concentrate. Dietary roughage source, however varied from completely GH to completely SH, and SBM was replaced by DDGS. Diets were formulated to contain 13.9% CP and an increasing amount …
Status, Distribution, And Density Of White-Tailed Jackrabbits And Black-Tailed Jackrabbits In South Dakota, Dustin J. Schaible
Status, Distribution, And Density Of White-Tailed Jackrabbits And Black-Tailed Jackrabbits In South Dakota, Dustin J. Schaible
Electronic Theses and Dissertations
The status of jackrabbit (Lepus spp.) populations throughout the Northern Great Plains has been a cause for concern by wildlife managers in recent years and there has been a paucity of information about the ecology of the white-tailed jackrabbit (Lepus townsendii) and the black-tailed jackrabbit (Lepus californicus) in South Dakota. Since there have been little monitoring efforts for hares, 21 permanent spotlight line transects were established across South Dakota for future surveying efforts. These transects were surveyed to obtain baseline information about jackrabbit density and distribution throughout the state. Jackrabbit density was highest in the northwestern portions of the state …
Relationship Of Plasma Ghrelin Concentrations With End-Products Of Carbohydrate Fermentation For Beef Cattle During A Feeding Interval, Aimee Wertz-Lutz, Jay Daniel, Jeff Clapper, Allen Trenkle, Donald Beitz
Relationship Of Plasma Ghrelin Concentrations With End-Products Of Carbohydrate Fermentation For Beef Cattle During A Feeding Interval, Aimee Wertz-Lutz, Jay Daniel, Jeff Clapper, Allen Trenkle, Donald Beitz
South Dakota Beef Report, 2007
Four steers (BW 1281±28.2 lb) were used to determine the relationship of plasma ghrelin concentrations with end-products of carbohydrate fermentation and hormones and metabolites indicative of nutrition status during a 12-h feeding interval. A common high-energy diet was offered at 240% of the intake necessary for BW maintenance (2.4xM) or 80% of the intake necessary for BW maintenance (0.8xM). At initiation of period I, 2 steers were allowed 2.4xM intake, whereas intake for the remaining 2 steers was restricted to 0.8xM. Equal aliquots of feed were offered at 0800 and at 2000 h. On 7, 14, and 21 d following …
Prolonged, Moderate Nutrient Restriction In Beef Cattle Results In Persistently-Elevated Plasma Ghrelin Concentrations, Aimee Wertz-Lutz, Jay Daniel, Jeff Clapper, Allen Trenkle, Donald Beitz
Prolonged, Moderate Nutrient Restriction In Beef Cattle Results In Persistently-Elevated Plasma Ghrelin Concentrations, Aimee Wertz-Lutz, Jay Daniel, Jeff Clapper, Allen Trenkle, Donald Beitz
South Dakota Beef Report, 2007
Four steers (BW 1281±28.2 kg) were used in a crossover design to determine the effects of prolonged, moderate energy and protein restriction on plasma ghrelin and GH concentrations. A common high-energy diet was offered at 240% of the intake necessary for BW maintenance (2.4xM) or 80% of the intake necessary for BW maintenance (0.8xM). As a common starting point, all steers were adjusted to 2.4xM during a 23-d pre-trial adaptation period. At initiation of period 1, 2 steers remained at 2.4xM, whereas intake for the remaining 2 steers was restricted to 0.8xM. Feed allotments were offered twice daily in equal …
Influence Of Post-Ai Nutrition On Blood Urea Nitrogen, Progesterone, And Pregnancy, George Perry, Brandi Perry, Josh Nelson, Julie Walker, Cody Wright
Influence Of Post-Ai Nutrition On Blood Urea Nitrogen, Progesterone, And Pregnancy, George Perry, Brandi Perry, Josh Nelson, Julie Walker, Cody Wright
South Dakota Beef Report, 2007
Research has shown that changes in nutrition can have an effect on reproductive performance. Our objective was to determine the effect of post-AI nutrition on BCS, blood urea nitrogen (BUN), progesterone, and pregnancy rates. Forage-developed Angus-cross bred heifers (n = 336) were synchronized with the Select Synch+ Controlled Internal Drug Releasing device (CIDR) protocol (d -7 100 μg GnRH and CIDR; d 0 25 mg PG and removal of CIDR). Estrus was detected for 72 h and heifers bred by AI 12 h after being detected in estrus; heifers not in detected in estrus were bred by AI and given …
2007 South Dakota Beef Report, Department Of Animal And Range Sciences, South Dakota State University, Agricultural Experiment Station, South Dakota State University, Cooperative Extension Service, South Dakota State University
2007 South Dakota Beef Report, Department Of Animal And Range Sciences, South Dakota State University, Agricultural Experiment Station, South Dakota State University, Cooperative Extension Service, South Dakota State University
South Dakota Beef Report, 2007
This is the 2007 South Dakota Beef Report. The articles published in this report summarize many of the beef cattle research activities conducted at South Dakota State University during 2007. The articles in this report have many levels of application. Some information has immediate application for your farm, ranch, or agribusiness. The articles include information on nutrition, feed management, reproductive management, health, growth and development, and economics of the cattle and beef industry in South Dakota.
Plasma Ghrelin Concentrations Of Beef Cattle Consuming A Similar Amount Of Dietary Energy Supplied By Different Ingredients, Aimee Wertz-Lutz, Jeff Clapper, Jenny Thurlow, Donald Beitz, Allen Trenkle
Plasma Ghrelin Concentrations Of Beef Cattle Consuming A Similar Amount Of Dietary Energy Supplied By Different Ingredients, Aimee Wertz-Lutz, Jeff Clapper, Jenny Thurlow, Donald Beitz, Allen Trenkle
South Dakota Beef Report, 2007
Previous research demonstrated that restricting nutrient intake by decreasing DMI of a high-grain diet increased plasma ghrelin concentrations. Objectives of this experiment were to determine 1) whether dietary ingredient composition influenced plasma ghrelin concentrations when energy intake was similar, and 2) whether relationships existed between plasma ghrelin concentrations and plasma insulin, NEFA, and GH concentrations or end-products of carbohydrate fermentation in the rumen. Five steers (1290 ± 39.9 lb) were used in a crossover design with dietary treatments of 50% hay-50% concentrate (HAY) offered at an amount that would meet the steer’s NEm requirement plus supply an additional 3.5 Mcal …
Effects Of Increasing The Dietary Energy Density By Replacing Grass Hay With Soybean Hulls And Dried Distillers Grains With Solubles On Nutrient Digestibility And Rumen Fermentation, Aimee Wertz-Lutz, Robert Zelinsky, Jeffrey Held
Effects Of Increasing The Dietary Energy Density By Replacing Grass Hay With Soybean Hulls And Dried Distillers Grains With Solubles On Nutrient Digestibility And Rumen Fermentation, Aimee Wertz-Lutz, Robert Zelinsky, Jeffrey Held
South Dakota Sheep Research Reports, 2006-07
We hypothesize that soybean hulls (SH) and dried distillers grains with solubles (DDGS) can be used in lamb diets to increase dietary energy density compared with a traditional grass hay (GH) and soybean meal (SBM) diet without causing adverse effects on nutrient digestibility and rumen function. To test this hypothesis, four ruminally-cannulated wethers were used in a 4x4 Latin square design to determine the effects of replacing GH with SH and replacing SBM with DDGS on nutrient digestibility and rumen fermentation. All diets were formulated to contain 60% roughage and 40% concentrate on DM basis. Dietary roughage source, however, varied …
Dust Emission From South Dakota Cattle Feedlots, Rick Weber
Dust Emission From South Dakota Cattle Feedlots, Rick Weber
The Journal of Undergraduate Research
Dust and particle emissions (PM) from cattle feedlots is a concern for producers in order to maintain good relations with neighbors and also to comply with the EPA proposed PM2.5 particulate emission rules. Dust at 2.5 microns, which cannot be seen by the naked eye, is a potential health hazard since it can be ingested into the lungs of humans. One of the proposed regulations of the Federal Clean Air Act is to apply the PM2.5 standard to the agricultural sector. This research project examines the particulate matter dust emissions of various sizes in microns including 2.5, 10, …
Cow Condition And Reproductive Performance, Julie Walker, George Perry
Cow Condition And Reproductive Performance, Julie Walker, George Perry
Animal Science Faculty Publications
It has been understood for decades that reproductive performance is the most important factor affecting production efficiency of a cow-calf enterprise. To maintain a yearly calving interval (one calf every 365 days), a cow must re-breed in 80 to 85 days after calving. With the nutrient priority of beef cattle being body maintenance, growth, lactation, fetal growth, breeding, and body reserve according to Short et al. (1990) indicates that reproduction is low on the list. Body condition score at parturition has been implicated as the single most important factor affecting postpartum interval to estrus and pregnancy in multiparous cows.
2006 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University
2006 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University
Little International "Little I" Agricultural Exposition Catalogs
No abstract provided.
Opportunities Farm Update, Erik Loe, Robbi Pritchard, Matt Loewe
Opportunities Farm Update, Erik Loe, Robbi Pritchard, Matt Loewe
South Dakota Beef Report, 2006
Opportunities Farm allows comparisons of different feedlot facilities located on one site for use in teaching and outreach. The three facilities are: 1) bed-pack confinement, 2) dirt-mound open pens, and 3) partially-covered pens. The first cattle were placed in Opportunities Farm in February 2004. There have been 3,023 head of steers and heifers marketed from Opportunities Farm through June 2006.
Sdsu Cow/Calf Teaching And Research Unit, Dick Pruitt
Sdsu Cow/Calf Teaching And Research Unit, Dick Pruitt
South Dakota Beef Report, 2006
The SDSU Cow Calf Teaching & Research Unit (CCU) provides cattle and facilities for numerous Animal Science and Range Science classes and a variety of research projects. The CCU also provides cattle for the SDSU Little International, Block & Bridle activities, numerous judging team workouts, and other activities that bring potential students to the SDSU campus. Kevin VanderWal and Anna Drew, along with part time student employees, manage the herd and assist with beef cattle activities throughout the year. Faculty members that have conducted or contributed to research in recent years include: Dick Pruitt, George Perry, Sandy Smart, Jeff Clapper, …
North Central Water Quality Survey¹, Lanette Butler, Cody L. Wright
North Central Water Quality Survey¹, Lanette Butler, Cody L. Wright
South Dakota Beef Report, 2006
This survey was conducted to determine the water quality in north central South Dakota. Twenty-one water sources from 16 different livestock operations were surveyed for this project. The water sources included five runoff-fed dugouts, 6 spring-fed dugouts, 4 deep wells (> 1000 ft), 3 medium-depth wells (100 to 500 ft) and 3 shallow wells (< 100 ft). Each water sample was initially tested with a hand-held Hanna Dist WP4 electroconductivity (EC) meter and the readings were recorded. Samples were then shipped to Servi-Tech Laboratories in Hastings, NE, where they were tested for EC, total dissolved solids (TDS), hardness, pH, calcium (Ca), chloride (Cl), magnesium (Mg), potassium (K), sulfate (SO4), sulfate-sulfur (SO4-S), and sodium (Na). Water quality indicators and mineral concentrations were not different over time when analyzed across all water sources or within each water source independently. Water from runoff-fed dugouts was lower (P < 0.05) in pH than water from spring-fed dugouts or wells. Well water contained greater (P < 0.05) concentrations of Cl than water from either runoff-fed or spring-fed dugouts. Potassium concentrations were greater (P < 0.05) in water from runoff-fed dugouts than in water from spring-fed dugouts or well water. Estimation of water quality without testing is highly inaccurate and variable. Livestock producers should obtain water samples for determination of water quality and adjust management to account for poor-quality water sources.
Rye And Turnips To Extend The Grazing Season For Weaned Calves, Alexander J. Smart, Richard J. Pruitt
Rye And Turnips To Extend The Grazing Season For Weaned Calves, Alexander J. Smart, Richard J. Pruitt
South Dakota Beef Report, 2006
As part of a series of studies to determine the feasibility of short season crops to extend the grazing season for weaned calves, planting date studies and a grazing trial were conducted near Brookings, SD. Small plots of turnips were seeded with a no-till drill into oat stubble on Aug 1 and 15 in year 1. In year 2, rye and turnips were seeded on July 20, Aug 1, and Aug 15. Based on forage yield, planting these crops on or before August 1 in eastern South Dakota is recommended. In late September of year 3, 44 weaned heifers were …
Predicting Forage Production, Stocking Rate, And Beef Production In Eastern South Dakota: A Case Study, Alexander J. Smart, Eric Mousel
Predicting Forage Production, Stocking Rate, And Beef Production In Eastern South Dakota: A Case Study, Alexander J. Smart, Eric Mousel
South Dakota Beef Report, 2006
In the summer of 1999, the Hand and Hyde County Bootstraps group met to form a working group to better understand “Management Intensive” Grazing (MIG) systems. From this working group of ranchers and state and federal agency personnel, evolved a goal to establish six demonstration sites in South Dakota (Figure 1). In 2000, the first demonstration site was established by Jim Faulstich near Highmore, SD in Hyde County. This site is a 320 acre pasture dominated by native mixed-grass prairie vegetation with some introduced species such as smooth bromegrass, Kentucky bluegrass, and crested wheatgrass. The pasture was fenced into 21 …