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Iowa State University

Life Sciences

Animal Science

Theses/Dissertations

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Utilization Of Pork And Pork By-Products For Nutritional And Behavioral Management Of Captive Exotic Felids, Cayla Jo Iske Jan 2015

Utilization Of Pork And Pork By-Products For Nutritional And Behavioral Management Of Captive Exotic Felids, Cayla Jo Iske

Graduate Theses and Dissertations

Currently two protein sources (beef or horse) comprise the majority of raw meat diet formulations for exotic carnivores in zoological institutions. Pork-based diets have traditionally not been fed to managed exotic carnivores, primarily because of microbial and pathogenic concerns, and nutrient digestibility of pork has not been evaluated in captive exotic carnivores, such as felids. Additionally, commercially prepared raw meat diets, while nutritionally complete, rarely meet nonnutritive requirements of cats, such as locating, capturing, and killing prey as well as psychological aspects related to the feeding process, and oral health needs. The pork industry currently sends many by-products to rendering ...


Comparison Of Piglet Birth Weight Classes, Parity Of The Dam, Number Born Alive And The Relationship With Litter Variation And Piglet Survival Until Weaning, Gregory Thomas Krahn Jan 2015

Comparison Of Piglet Birth Weight Classes, Parity Of The Dam, Number Born Alive And The Relationship With Litter Variation And Piglet Survival Until Weaning, Gregory Thomas Krahn

Graduate Theses and Dissertations

The objectives of this study was to determine the relationship between individual piglet birth weight and the odds of survival until weaning and differences due to sow parity. Piglets in this study were purebred Yorkshire (n=70763), purebred Landrace (n=51091), purebred Duroc (n=16834), and Landrace x Yorkshire or Yorkshire x Landrace (n=38447) reciprocal F1 piglets. Data were recorded from sows in four production units within the same genetic flow from September 2009 through November 2013. Piglets were individually weighed and identified within 24 hours of birth and cross-fostering was completed within 48 hours of birth. Survival was ...


Evaluation Of Algae Meal As A Novel Feedstuff For Ruminants, Rebecca Sue Stokes Jan 2015

Evaluation Of Algae Meal As A Novel Feedstuff For Ruminants, Rebecca Sue Stokes

Graduate Theses and Dissertations

Recent advances in technology support the use of heterotrophic microalgae for the production of oils for bioenergy. Oil is extracted and the resultant product includes a combination of both partially deoiled microalgae (PDM) and soyhulls, resulting in an algae meal (ALG) with a unique profile of protein, fiber, and fat. However, this novel feedstuff and the role it may play in the ruminant diet has not been previously characterized. Since PDM is not available commercially to producers separate from soyhulls, the whole product was used for the current research. Thus, the ensuing research trials were designed to: 1) determine the ...


Effects Of Heat Stress Or Ketosis On Metabolism And Inflammatory Biomarkers In Ruminants And Monogastrics, Mohannad Khaled Ali Abuajamieh Jan 2015

Effects Of Heat Stress Or Ketosis On Metabolism And Inflammatory Biomarkers In Ruminants And Monogastrics, Mohannad Khaled Ali Abuajamieh

Graduate Theses and Dissertations

There are several constraints to of the sustainability of the livestock industries in different areas of the world. The two most obvious hurdles to high dairy production are diseases during the transition period and heat stress (HS). Despite decades of research, the actual pathologies of ketosis and HS remain poorly understood. In the US, it was estimated that the economic losses from ketosis is $360/cow/cycle, and to HS was ~ $900 million per year. Thus, both severely jeopardize the competitiveness of animal agriculture. Regardless of the herd size, HS and ketosis affect every dairy region in the country. The ...


Changing Distillers Grains: Implications For Cattle Performance And Management, Erika Linn Lundy Jan 2015

Changing Distillers Grains: Implications For Cattle Performance And Management, Erika Linn Lundy

Graduate Theses and Dissertations

In the past decade, the ethanol industry has begun changing their production processes to capture more value from the corn kernel, altering the nutrient profile of distillers grains (DG). One of the first methods of value extraction includes partial removal of corn oil, resulting in a decreased oil or fat content of DG. Although the majority of ethanol plants are currently extracting oil from DG, limited research has been conducted regarding the use of new generation DG in finishing cattle diets. Previous research with decreased fat DG has shown varying results in cattle performance when compared to traditional DG. The ...


Impact Of Prrs And Ped Viruses On Grower Pig Performance And Intestinal Function, Wesley Paul Schweer Jan 2015

Impact Of Prrs And Ped Viruses On Grower Pig Performance And Intestinal Function, Wesley Paul Schweer

Graduate Theses and Dissertations

Porcine reproductive and respiratory syndrome (PRRSV) and porcine epidemic diarrhea (PEDV) viruses are two of the most economically significant diseases to affect the U.S. swine industry today. Yet, little is known about how they impact pig nutrient digestibility, intestinal function and feed efficiency. Therefore, the overall objective of this thesis was to determine the impact of PRRSV and PEDV viruses, alone or in combination, on grower pig performance, tissue accretion and on intestinal function and integrity. To accomplish these objectives, a series of experiments were conducted and are outlined in three research chapters (Chapter 2, 3 and 4). In ...


Evaluating The Ability Of The Ne System To Predict Growth Performance And Energy Utilization Of Growing Pigs, Jesus Alberto Acosta Camargo Jan 2015

Evaluating The Ability Of The Ne System To Predict Growth Performance And Energy Utilization Of Growing Pigs, Jesus Alberto Acosta Camargo

Graduate Theses and Dissertations

The net energy (NE) system describes the useful energy for growth better than the metabolizable energy (ME) system. Therefore, the NE system should demonstrate a more predictable animal response when a wide range of ingredients are used, but this fact needs to be demonstrated in practice. The objective of this thesis was to evaluate the NE system in diets containing a diverse set of ingredients. Two experiments were conducted: the first experiment consisted of comparing growth performance, carcass characteristics and the efficiency of dietary energy of 2,054 pigs housed in pens in a commercial research barn. Pens were assigned ...


Effects Of Two Feed Additives On Performance, Energy Digestibility, And Body Composition Of First-Cycle Laying Hens Fed Two Concentrations Of Dietary Energy, Alysha Gareis Jan 2014

Effects Of Two Feed Additives On Performance, Energy Digestibility, And Body Composition Of First-Cycle Laying Hens Fed Two Concentrations Of Dietary Energy, Alysha Gareis

Graduate Theses and Dissertations

Three experiments were conducted to determine the effects of feed additives on the performance, energy digestibility, and body composition of first-cycle laying hens fed two concentrations of dietary energy. The first and second experiments were 8 wk in duration. The first experiment contained two dietary energy levels (2,750 and 2,850 kcal/kg) with or without the addition of a mannose rich fraction (MRF) from a specific strain of yeast. As expected, no differences in performance parameters including egg production, egg weight, and egg mass were detected, although increased dietary energy, but not MRF resulted in increased total and ...


Nutrient Utilization, Pork Quality, And Lysine Requirement Of Immunological Castrates, Amanda Jo Elsbernd Jan 2014

Nutrient Utilization, Pork Quality, And Lysine Requirement Of Immunological Castrates, Amanda Jo Elsbernd

Graduate Theses and Dissertations

Investigational research is required to support the development of a new technology called immunological castration, which addresses the issue of boar taint in male pigs and allows for increasing growth efficiency. There is a knowledge gap in the understanding of the nutritional requirements for immunological castrates (IC). Therefore, the objective of this thesis was to extend the current knowledge of immunological castration in the pig as it relates to growth performance, nitrogen and phosphorus retention, and pork quality. Forty six pigs were used in the first experiment, 11 each of IC and physical castrates (PC) and 12 each of gilts ...


Defining The Energy And Nutrient Content Of Corn Grown In Drought-Stressed Conditions And Determining The Relationship Between Energy Content Of Corn And The Response Of Growing Pigs To Xylanase Supplementation, Monica A. Newman Jan 2014

Defining The Energy And Nutrient Content Of Corn Grown In Drought-Stressed Conditions And Determining The Relationship Between Energy Content Of Corn And The Response Of Growing Pigs To Xylanase Supplementation, Monica A. Newman

Graduate Theses and Dissertations

Two experiments were conducted to determine the effects of xylanase on apparent total tract-(ATTD) and apparent ileal digestibility (AID) in corn-based diets using higher and lower energy corn samples with pigs. The objective of these experiments was to determine if the efficacy of exogenous xylanases are increased in less digestible, as compared to more digestible, corn samples. First, corn samples of higher and lower digestible energy had to be identified. The 2012 drought-stressed growing conditions provided an opportunity to identify these samples. In experiment 1, 28 corn samples were selected from the 2012 crop, using yield as an initial ...


Enrichment, Isolation And Characterization Of Anaerobic Oxalate-Degrading Bacteria From The Rumen, Karl A. Dawson Jan 1979

Enrichment, Isolation And Characterization Of Anaerobic Oxalate-Degrading Bacteria From The Rumen, Karl A. Dawson

Retrospective Theses and Dissertations

No abstract provided.


Purification And Properties Of Skeletal Muscle Microsomes , Bruce Alan Eason Jan 1969

Purification And Properties Of Skeletal Muscle Microsomes , Bruce Alan Eason

Retrospective Theses and Dissertations

No abstract provided.


Voluntary Intake By Grazing Steers And Digestibility Trends Of Tall Fescue And Reed Canarygrass As Summer And Fall-Saved Pasture , William Barter Bryan Jan 1969

Voluntary Intake By Grazing Steers And Digestibility Trends Of Tall Fescue And Reed Canarygrass As Summer And Fall-Saved Pasture , William Barter Bryan

Retrospective Theses and Dissertations

No abstract provided.


Observations On The Etiology, Prophylaxis And Therapy Of Pasture Bloat , Richard Harmon Johnson Jan 1959

Observations On The Etiology, Prophylaxis And Therapy Of Pasture Bloat , Richard Harmon Johnson

Retrospective Theses and Dissertations

No abstract provided.