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Full-Text Articles in Life Sciences

Effects Of Late Gestation Supplementation And Creep Feeding On Spring Calving Beef Cows In The Nebraska Sandhills, Devin Broadhead Aug 2019

Effects Of Late Gestation Supplementation And Creep Feeding On Spring Calving Beef Cows In The Nebraska Sandhills, Devin Broadhead

Theses and Dissertations in Animal Science

The objectives of this research were to 1) evaluate the effects of late gestation supplementation, synchronization and creep feeding on cow and calf production traits 2) evaluate the pooled effects of 5 studies involving late gestation supplementation on cow and calf traits. Experiment 1 was a three year study conducted on 8 pastures at the Gudmundsen Sandhills Laboratory. Cows were assigned to 1 of 4 late-gestation supplementation treatments, postpartum progestin or control, and 1 of 2 creep feed treatments to make up a 4 x 2 x 2 factorial arrangement. Calves were followed through to slaughter.

Experiment 2 involved 5 ...


The Marin County Livestock Protection Program: 15 Years In Review, Stephanie Larson, Devan A. Mcgranahan, Robert M. Timm Jan 2019

The Marin County Livestock Protection Program: 15 Years In Review, Stephanie Larson, Devan A. Mcgranahan, Robert M. Timm

Human–Wildlife Interactions

Predation by wild carnivores challenges livestock producers worldwide. To reduce or offset losses due to predation, a variety of predator control methods and compensation schemes have been developed. In 2001, Marin County, California, USA replaced its U.S. Department of Agriculture Wildlife Services (WS) cooperative predator damage management program with a county-run program that emphasized nonlethal methods for preventing and controlling coyote (Canis latrans) predation on domestic sheep (Ovis aries). This new Livestock Protection Program (LPP) cost-shared with livestock producers’ efforts to improve fencing, obtain and maintain guard animals, and other such nonlethal methods, and initially it compensated producers for ...


The Economic And Social Values Associated With Small South Dakota Lakes, Aaron Patrick Sundmark Jan 2019

The Economic And Social Values Associated With Small South Dakota Lakes, Aaron Patrick Sundmark

Electronic Theses and Dissertations

The valuation of small fishing lakes is a vital component in understanding the importance of fishing and of recreational resources, in general. Knowing the values associated with such lakes is essential when prioritizing management activities. The overall value of a lake as a resource for human benefit is estimated as the summation of both instrumental and non-instrumental values. Instrumental values consist of economic and utilitarian values, as well as the values that a lake provides from ecosystem services. Non-instrumental values consider what the lake is worth as a good of its own, such as aesthetic, moral, and spiritual values gained ...


On-Farm Utilization Of Precision Dairy Monitoring: Usefulness, Accuracy, And Affordability, Elizabeth A. Eckelkamp Jan 2018

On-Farm Utilization Of Precision Dairy Monitoring: Usefulness, Accuracy, And Affordability, Elizabeth A. Eckelkamp

Theses and Dissertations--Animal and Food Sciences

Precision dairy monitoring is used to supplement or replace human observation of dairy cattle. This study examined the value dairy producers placed on disease alerts generated from a precision dairy monitoring technology. A secondary objective was calculating the accuracy of technology-generated disease alerts compared against observed disease events. A final objective was determining the economic viability of investing in a precision dairy monitoring technology for detecting estrus and diseases.

A year-long observational study was conducted on four Kentucky dairy farms. All lactating dairy cows were equipped with a neck and leg tri-axial accelerometer. Technologies measured eating time, lying time, standing ...


Time Series Forecast Analysis In Wholesale Broiler Markets, Christopher R. Sims Dec 2017

Time Series Forecast Analysis In Wholesale Broiler Markets, Christopher R. Sims

Theses and Dissertations

In 2016 the chicken industry provided nearly 1.2 million jobs, 68 billion dollars in wages, 313 billion dollars in economic activity and 24 billion dollars in government revenue (John Dunham & Associates, Inc., 2016). Broiler production has changed dramatically from the early 90’s to the turn of the 21st century. Technological advancements, continuous improvements, production efficiencies and industry changes have made the industry the global market it is today. The poultry industry is an extremely volatile market with prices constantly fluctuating in response to input price volatility and demand and supply changes. These changes are often driven by world economic conditions which impacts the roughly 20% of U.S. production that is exported. Due to these variations, accurate forecasting of poultry prices is difficult. Economic modeling is complex at best; this paper examines a comparison between vector autoregression (VAR) and autoregressive (AR) techniques. Urner Barry average monthly northeast wholesale poultry parts price data was used for this research. Parts analyzed are; drumstick (DRUM), jumbo boneless skinless breast tender out (BSBTO), leg quarter (LQ), thigh (THIGH), small wing (SMWING), jumbo wing (JMWING), tender (TENDER) and whole bird without giblets weighing 2 ¼ lbs. (WOG). This modeling will focus on the ...


Productivity Measures In Beef Cows And Calves Following A Single Subcutaneous Injection Of Extended-Release Eprinomectin, Claire Andresen Jan 2017

Productivity Measures In Beef Cows And Calves Following A Single Subcutaneous Injection Of Extended-Release Eprinomectin, Claire Andresen

Graduate Theses and Dissertations

The effect of a single subcutaneous injection of extended-release eprinomectin for parasite control on cow/calf performance was evaluated in a pair of studies. In the first study, a fall-calving Angus herd was utilized. Mature cows were treated with either extended-release eprinomectin (EPR) or a conventional injectable anthelmintic (CONV). Cows treated with EPR had better maintenance of BCS through calving and into breeding. Subsequent pregnancy rates were greater for EPR than CONV cows. Furthermore, calves from EPR dams were younger at weaning, but had greater weaning weights than calves from CONV dams. From the same fall-calving Angus herd, replacement heifers ...


Slides: Environmental Flows In The Era Of 'River Anthropology', Rebecca Tharme Jun 2016

Slides: Environmental Flows In The Era Of 'River Anthropology', Rebecca Tharme

Coping with Water Scarcity in River Basins Worldwide: Lessons Learned from Shared Experiences (Martz Summer Conference, June 9-10)

Presenter: Rebecca Tharme, Riverfutures Ltd.

18 slides


Factors Affecting Timing And Intensity Of Calving Season Of Beef Cow-Calf Producers In The Midwest, Lee L. Schulz, Claire E. Andresen, Patrick J. Gunn Jan 2016

Factors Affecting Timing And Intensity Of Calving Season Of Beef Cow-Calf Producers In The Midwest, Lee L. Schulz, Claire E. Andresen, Patrick J. Gunn

Animal Industry Report

Despite demonstrated market incentives to adopt controlled calving seasons, many producers still have herds that calve somewhat broadly throughout the year. Primarydata, collected through a coordinated survey effort withUSDA’s National Agricultural Statistics Service, were usedto quantify factors that affect producers’ decisions regardingtiming and intensity of calving season. Ninety-seven, 50, 33,and 26% of farms calve in the spring (Mar, Apr, May),summer (Jun, Jul, Aug), fall (Sep, Oct, Nov), and winter(Dec, Jan, Feb), respectively. Twenty-two percent observeda calving season exclusively in the spring. Sixty-six percentof respondents indicated calving season was dictated byweather, 34% because of labor availability, and ...


A Benefit-Cost Analysis Decision Framework For Mitigation Of Disease Transmission At The Wildlife–Livestock Interface, Stephanie A. Shwiff, Steven J. Sweeney, Julie L. Elser, Ryan S. Miller, Matthew L. Farnsworth, Pauline Nol, Steven S. Shwiff, Aaron M. Anderson Jan 2016

A Benefit-Cost Analysis Decision Framework For Mitigation Of Disease Transmission At The Wildlife–Livestock Interface, Stephanie A. Shwiff, Steven J. Sweeney, Julie L. Elser, Ryan S. Miller, Matthew L. Farnsworth, Pauline Nol, Steven S. Shwiff, Aaron M. Anderson

Human–Wildlife Interactions

The economics of managing disease transmission at the wildlife–livestock interface have received heightened attention as agricultural and natural resource agencies struggle to tackle growing risks to animal health. In the fiscal landscape of increased scrutiny and shrinking budgets, resource managers seek to maximize the benefits and minimize the costs of disease mitigation efforts. To address this issue, a benefit-cost analysis decision framework was developed to help users make informed choices about whether and how to target disease management efforts in wildlife and livestock populations. Within the context of this framework, we examined the conclusions of a bene� t-cost analysis ...


Beef Species Symposium: Economic Considerations Related To U.S. Beef Herd Expansion, Glynn T. Tonsor, Lee L. Schulz Sep 2015

Beef Species Symposium: Economic Considerations Related To U.S. Beef Herd Expansion, Glynn T. Tonsor, Lee L. Schulz

Economics Publications

Significant attention perpetually surrounds possible changes in breeding herd inventories in the U.S. beef cattle industry. This article outlines economic considerations of U.S. herd expansion. Factors restricting expansion include land availability, increasing production efficiency, operator demographics, capital requirements, and commodity price volatility. Several offsetting factors support herd expansion including unprecedented cow–calf returns, ongoing global beef demand growth, and timing within the current cattle cycle. In addition to these industry-wide factors, several important variations in individual ranch considerations are outlined. The authors’ expectations on future herd dynamics are provided, highlighting broader implications for individual operations, industry leaders, and ...


Aberdeen Creek Dredging Project – Restarting An Economic Engine, Thomas J. Murray Jul 2015

Aberdeen Creek Dredging Project – Restarting An Economic Engine, Thomas J. Murray

Reports

No abstract provided.


2015 South Dakota Beef Report, Department Of Animal Sciences, South Dakota State University, Agricultural Experiment Station, South Dakota State University, Cooperative Extension Service, South Dakota State University Jan 2015

2015 South Dakota Beef Report, Department Of Animal Sciences, South Dakota State University, Agricultural Experiment Station, South Dakota State University, Cooperative Extension Service, South Dakota State University

South Dakota Beef Report, 2015

This is the 2015 South Dakota Beef Report produced by the SDSU Department of Animal Sciences in conjunction with the Agricultural Experiment Station, and the SDSU Cooperative Extension. The articles published in this report summarize many of the beef cattle research activities conducted at South Dakota State University during 2015. 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,management, health, growth and development, and economics of the cattle and beef industry in South Dakota.


Compost Bedded Pack Barns For Dairy Cattle: Bedding Performance And Mastitis As Compared To Sand Freestalls, Elizabeth A. Eckelkamp Jan 2014

Compost Bedded Pack Barns For Dairy Cattle: Bedding Performance And Mastitis As Compared To Sand Freestalls, Elizabeth A. Eckelkamp

Theses and Dissertations--Animal and Food Sciences

Lameness and mastitis are the two most costly diseases in the dairy industry. Reduction of these diseases through housing and management is beneficial. Compost bedded pack (CBP) and sand freestall barns were compared in a long-term, on-farm study to assess the effect of housing on each disease. Another research objective was to evaluate the effects of ambient weather conditions on moisture and 20 cm internal temperature of CBP. Compost bedded pack moisture, C:N ratio, and internal temperature effects on cleanliness, mastitis, and bedding bacterial counts were also considered. The last research objective was to evaluate the economics of bedding ...


Evaluating Impact Of Diet, Housing And Season Systems On Feedlot Cattle Finishing Programs, Josephat Gichobi Njoka Jan 2014

Evaluating Impact Of Diet, Housing And Season Systems On Feedlot Cattle Finishing Programs, Josephat Gichobi Njoka

Graduate Theses and Dissertations

ABSTRACT

A four-year study was conducted using 1,987 yearling steers of predominantly mixed British breeds with an average starting weight of approximately 700 lb. The overall objectives of this study was to evaluate feedlot performance, carcass characteristics and expected economic projections for placing steers on feed quarterly per year for a period of 4 yr in different housing-diet systems. A pen with an average of 20 steers was the experimental unit, which was replicated once at the start of every trial period. Treatments were 2-levels of diet, 3-levels of housing, and season with 4-levels per year. The two diets ...


Assessment Of The Economic Impacts Of Recreational Boating In Virginia, Thomas J. Murray Dec 2012

Assessment Of The Economic Impacts Of Recreational Boating In Virginia, Thomas J. Murray

Reports

Virginia is home to more than 200,000 recreational boats, providing a gateway to marine recreation in Chesapeake Bay and offshore waters. Virginia’s importance to boating access carries with it an expanding economy related to boating and boating related industries.

In addition to the large group of boater-citizens who reside in Virginia, local marine businesses such as marinas also provide access and berthing to many non-locally owned watercraft. While watercraft registrations provide a partial and useful estimate of the stock of boats in a region, the true economic impact arising from recreational boating primarily depends upon the type of ...


Energy Use In Pig Production: An Examination Of Current Iowa Systems, Peter J. Lammers, M. Douglas Kenealy, James B. Kliebenstein, Jay D. Harmon, Matthew J. Helmers, Mark S. Honeyman Mar 2012

Energy Use In Pig Production: An Examination Of Current Iowa Systems, Peter J. Lammers, M. Douglas Kenealy, James B. Kliebenstein, Jay D. Harmon, Matthew J. Helmers, Mark S. Honeyman

Agricultural and Biosystems Engineering Publications

This paper compares energy use for different pig production systems in Iowa, a leader in US swine production. Pig production systems include not only the growth and performance of the pigs, but also the supporting infrastructure of pig production. This supporting infrastructure includes swine housing, facility management, feedstuff provision, swine diets, and manure management. Six different facility type × diet formulation × cropping sequence scenarios were modeled and compared. The baseline system examined produces 15,600 pigs annually using confinement facilities and a corn-soybean cropping sequence. Diet formulations for the baseline system were corn-soybean meal diets that included the synthetic AA L-lysine ...


Effects Of A Premolt Calcium And Low-Energy Molt Program On Laying Hen Performance, Egg Quality, And Economics, Emily R. Dickey, Anna Johnson, Kenneth J. Stalder, Kristjan Bregendahl Feb 2012

Effects Of A Premolt Calcium And Low-Energy Molt Program On Laying Hen Performance, Egg Quality, And Economics, Emily R. Dickey, Anna Johnson, Kenneth J. Stalder, Kristjan Bregendahl

Animal Science Publications

The objectives of this study were to evaluate and compare the effects of production, physiology, egg quality, and economics of laying hens housed in a cage system when offered a calcium premolt treatment and low-energy molt diets versus a traditional feed withdrawal (FW) treatment during and after molt. In total, 981 Hy-Line W-36 laying hens (85 wk of age) housed 3 per cage were used. Six treatments were compared in a 2 × 3 factorial design with 2 calcium premolt treatments (fine and coarse) and 3 molt diets (FW, soybean hulls, and wheat middlings). The coarse Ca was a 50:50 ...


Brucellosis In The Greater Yellowstone Area: Disease Management At The Wildlife–Livestock Interface, Brant A. Schumaker, Dannelle E. Peck, Mandy E. Kauffman Jan 2012

Brucellosis In The Greater Yellowstone Area: Disease Management At The Wildlife–Livestock Interface, Brant A. Schumaker, Dannelle E. Peck, Mandy E. Kauffman

Human–Wildlife Interactions

Elk (Cervus elaphus) and bison (Bison bison) of the Greater Yellowstone area are the last known reservoir of bovine brucellosis (Brucella abortus) in the United States. Domestic cattle occasionally contract the disease while grazing in areas where infected wild ungulates have aborted their fetuses or have given birth. Cases of brucellosis in cattle trigger costly quarantine, testing, and culling procedures. Government agencies and stakeholders, therefore, allocate valuable resources to prevent wildlife-to-cattle transmission. Scientific uncertainty about the biology, epidemiology, and economics of brucellosis makes it difficult to determine the length to which society should go to control it or the combination ...


Smooth Bromegrass Pasture Beef Growing Systems: Fertilization Strategies And Economic Analysis, A. K. Watson, T. J. Klopfenstein, Walter H. Schacht, G. E. Erickson, D. R. Mark, Matt K. Luebbe, K. R. Brink, Matthew A. Greenquist Jan 2012

Smooth Bromegrass Pasture Beef Growing Systems: Fertilization Strategies And Economic Analysis, A. K. Watson, T. J. Klopfenstein, Walter H. Schacht, G. E. Erickson, D. R. Mark, Matt K. Luebbe, K. R. Brink, Matthew A. Greenquist

Faculty Papers and Publications in Animal Science

In recent years, prices for N fertilizer have increased dramatically, reducing net returns of fertilized pasture systems. A 5-yr study from 2005 to 2009 was conducted to evaluate management strategies and relative differences in profitability for 3 methods of backgrounding calves on smooth bromegrass pastures. Forty-five steers were used each year for a total of 225 animals in a randomized complete block design. Treatments included pastures fertilized in the spring with 90 kg N/ha (FERT), nonfertilized pastures with calves supplemented daily with dried distillers grains plus solubles (DDGS) at 0.6% of BW (SUPP), and control (CONT) pastures that ...


Virginia Charter Boat Workshop Summary March 2012, Susanna Musick Jan 2012

Virginia Charter Boat Workshop Summary March 2012, Susanna Musick

Reports

No abstract provided.


Assessment Of The Economic Impacts Of Recreational Boating In Middlesex County, Virginia, Thomas J. Murray Mar 2011

Assessment Of The Economic Impacts Of Recreational Boating In Middlesex County, Virginia, Thomas J. Murray

Reports

No abstract provided.


An Examination Of Methods: Hand Picking Red Crabs And Keeping Them Alive On Shore, Dan Kauffman, Robert A. Fisher Oct 2010

An Examination Of Methods: Hand Picking Red Crabs And Keeping Them Alive On Shore, Dan Kauffman, Robert A. Fisher

Reports

No abstract provided.


Nonsolar Energy Use And One-Hundred-Year Global Warming Potential Of Iowa Swine Feedstuffs And Feeding Strategies, Peter J. Lammers, M. Douglas Kenealy, James B. Kliebenstein, Jay D. Harmon, Matthew J. Helmers, Mark S. Honeyman Mar 2010

Nonsolar Energy Use And One-Hundred-Year Global Warming Potential Of Iowa Swine Feedstuffs And Feeding Strategies, Peter J. Lammers, M. Douglas Kenealy, James B. Kliebenstein, Jay D. Harmon, Matthew J. Helmers, Mark S. Honeyman

Agricultural and Biosystems Engineering Publications

Demand for nonsolar energy and concern about the implications of fossil fuel combustion have encouraged examination of energy use associated with agriculture. The United States is a global leader in pig production, and the United States swine industry is centered in Iowa. Feed is the largest individual input in pig production, but the energy consumption of the Iowa swine feed production chain has yet to be critically examined. This analysis examines nonsolar energy use and resulting 100-yr global warming potential (GWP) associated with the swine feed production chain, beginning with cultivation of crops and concluding with diet formulation. The nonsolar ...


Applications And Potentials For Biogenic Methane Recovery Operations In Nebraska Agriculture, Industry, And Economic Development, David Micheal Dingman Jul 2009

Applications And Potentials For Biogenic Methane Recovery Operations In Nebraska Agriculture, Industry, And Economic Development, David Micheal Dingman

Environmental Studies Undergraduate Student Theses

ABSTRACT: This thesis report illustrates the applications and potentials of biogenic methane recovery in Nebraska’s agricultural and industrial sectors and as a means for increasing sustainable economic development in the state’s rural communities. As the nation moves toward a new green economy, biogenic methane recovery as a waste management strategy and renewable energy resource presents significant opportunities for Nebraska to be a national and world leader in agricultural and industrial innovation, advanced research and development of renewable energy technology, and generation of new product markets. Nebraska’s agricultural economy provides a distinct advantage to the state for supporting ...


Assessment Of The Economic Impacts Of Recreational Boating In The City Of Hampton, Thomas J. Murray, James Kirkley, Doug Lipton Jan 2009

Assessment Of The Economic Impacts Of Recreational Boating In The City Of Hampton, Thomas J. Murray, James Kirkley, Doug Lipton

Reports

No abstract provided.


Quantifying The Role Of Riparian Management To Control Non-Point Source Pollution Of Pasture And Cropland Streams, James R. Russell, Daniel G. Morrical, John Kovar, Daryl R. Strohbehn, John D. Lawrence, Mathew M. Haan, Shelly Lee Nellesen, Thomas M. Isenhart, Richard Schultz Jan 2009

Quantifying The Role Of Riparian Management To Control Non-Point Source Pollution Of Pasture And Cropland Streams, James R. Russell, Daniel G. Morrical, John Kovar, Daryl R. Strohbehn, John D. Lawrence, Mathew M. Haan, Shelly Lee Nellesen, Thomas M. Isenhart, Richard Schultz

Leopold Center Completed Grant Reports

Grazing management practices have the potential to mitigate some problems with sediment and phosphorus loading in pasture streams. The project demonstrated possible strategies to lessen grazing impacts on streams.


A Study Of The Factors That Influence Consumer Attitudes Towards Beef Products Using The Conjoint Market Analysis Tool, Brian E. Mennecke, Anthony M. Townsend, Dermot J. Hayes, Steven M. Lonergan Jan 2009

A Study Of The Factors That Influence Consumer Attitudes Towards Beef Products Using The Conjoint Market Analysis Tool, Brian E. Mennecke, Anthony M. Townsend, Dermot J. Hayes, Steven M. Lonergan

Leopold Center Completed Grant Reports

Beef producers looking for a competitive edge in today's markets need information about the qualities that consumers consider most important. Using conjoint marketing analysis allowed the investigators to sort out the most relevant characteristics for meat purchasers.


Economic Outlook For Expansion Of The Eastern Shore Farmers’ Market: Seafood Handling, Storage, And Transportation Facility, Thomas J. Murray, James E. Kirkley Sep 2008

Economic Outlook For Expansion Of The Eastern Shore Farmers’ Market: Seafood Handling, Storage, And Transportation Facility, Thomas J. Murray, James E. Kirkley

Reports

No abstract provided.


Slides: Rethinking Western Water Law: Whatever Happened To The Public Interest?, Mark Squillace Jun 2008

Slides: Rethinking Western Water Law: Whatever Happened To The Public Interest?, Mark Squillace

Shifting Baselines and New Meridians: Water, Resources, Landscapes, and the Transformation of the American West (Summer Conference, June 4-6)

Presenter: Mark Squillace, Director, Natural Resources Law Center, University of Colorado Law School

15 slides


Business Organization And Coordination In Niche Hog Marketing, James Kliebenstein, Brent Hueth, Maro A. Ibarburu Jan 2008

Business Organization And Coordination In Niche Hog Marketing, James Kliebenstein, Brent Hueth, Maro A. Ibarburu

Leopold Center Completed Grant Reports

Niche hog marketing enterprises face a unique set of challenges. This study considered five critical management issues, and analyzed the workings of two niche pork markets in Iowa. Issues of market timing, product quality, process verification, business organization, and sharing of returns are discussed.