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CURRENT RESEARCH PROGRAM OVERVIEW

Current Experiments (Initiated in 2002)

Current Experiments (Initiated in 2003)

Current Experiments (Initiated in 2004)

Title: Training Goats for Cedar Consumption

Experiment Number: GA-02-01

Project Number: OKLX-SAHLU

Investigators: G. Animut, A. L. Goetsch, R. C. Merkel, L. J. Dawson, R. Puchala, and T. Sahlu

Objective:

  • Determine effects on later eastern red cedar consumption of stepwise increases in the dietary level of cedar, as compared with an abrupt dietary introduction of a set level of cedar or no prior cedar exposure

Title: Energy for Growth of Meat Goats

Experiment Number: CTZ-02-02

Project Number: OKLX0003833

Investigators: C.-T. Zheng, I. Tovar-Luna, R. Puchala, G. Detweiler, A. L. Goetsch, and T. Sahlu

Objectives:

  • Determine effects and interactions of goat genotype and diet quality on:
    • Fasting heat production.
    • Maintenance energy (ME) requirements.
    • Efficiency of ME utilization for maintenance.
    • ME requirement for growth.
    • Efficiency of ME utilization for growth.
  • Determine the relationship between heart rate and heat production determined via indirect calorimetry, measured with ad libitum and maintenance feeding of different qualities of diets and when fasting

Title: Quality Characteristics and Yield Predictive Models of Goat Milk Cheese

Experiment Number: SZ-02-03

Project Number: OKLX-1999-04114

Investigators: S. Zeng, K. A. Soryal, D. van Hekken, B. Bah, and B. Min

Objectives:

  • Determine the effects of milk composition and somatic cell counts on the quality and yield of goat cheese and develop yield predictive models for goat cheeses (French soft, semi-hard, and hard).
  • Characterize semi-hard and hard cheeses in terms of composition, microstructure, rheological properties, protein profiles, and sensory characteristics as affected by seasonal variations of milk composition and property changes during cheese storage.

Title: Flushing of Meat Goats

Experiment Number: RM-02-04

Project Number: OKLX-SAHLU

Investigators: R. C. Merkel, G. Abebe, A. L. Goetsch, L. J. Dawson, R. Puchala, C. F. Rosenkrans, and T. Sahlu

Objective:

  • Determine influences of short-term supplementation of meat goat does in low or moderate/high body condition with high levels of protein sources of low ruminal degradability and rich on branch chain amino acids and arginine on reproductive performance.

Title: Evaluation of Stocking Rate Effects with Pastures that Contain Various Forbs and Grasses being Co-Grazed by Goats and Sheep and Subsequent Performance with an Energy-Rich Diet - First Grazing Season

Experiment Number: GA-02-05

Project Number: OKLX-0003832

Investigators: G. Animut, A. L. Goetsch, G. E. Aiken, C. R. Krehbiel, R. Puchala, C.-T. Zheng, G. Detweiler, J. O. Joseph, and T. Sahlu

Objective:

  • Evaluate stocking rate effects on diet selection and performance of goats and sheep co-grazing pastures containing various forbs and grasses and assess subsequent growth with consumption of a high concentrate diet.

Title: Potential Anthelmintic Effects in Goats of Condensed Tannins

Experiment Number: BM-02-06

Project Number: OKLX-SAHLU

Investigators: B. R. Min, S. H. Hart, D. Miller, and T. Sahlu

Objective:

  • Determine effects of continuous or intermittent grazing of forage containing condensed tannins (Sericea lespedeza) on internal parasites in goats

Title: Use of Goats for Sustainable Vegetation Management in Grazing Lands - First Grazing Season

Experiment Number: JJ-02-07

Project Number: LS01-119

Investigators: J. O. Joseph, A. L. Goetsch, S. P. Hart, T. A. Gipson, R. C. Merkel, and G. Detweiler

Objectives:

  • General: Investigate effects of various goat management methods for vegetation rehabilitation/control in different grazing land settings in the south-central US, demonstrate and display appropriate means of vegetation management with goats, and provide education in other related goat management areas.
  • Specific: Determine effects of different goat grazing treatments on vegetation conditions and animal performance at six Oklahoma sites, in cooperation with the Caddo, Cherokee, Choctaw, Greater Seminole, Osage, and Sac and Fox Nations. Treatments include different stocking rates, rotational grazing, co-grazing with sheep or cattle, no livestock grazing, herbicides, and mowing.

Title: Energy Requirements for Lactation by Goats

Experiment Number: ITL-02-08

Project Number: OKLX0003833

Investigators: I. Tovar-Luna, A. L. Goetsch, C.-T. Zheng, R. Puchala, and T. Sahlu

Objective:

  • Determine energy requirements for milk production by Alpine does in different stages of lactation and consuming diets differing in concentrate level, via respiration calorimetry and heart rate.

Title: Energy Requirements for Mohair Fiber Production

Experiment Number: CTZ-02-09

Project Number: OKLX0003833

Investigators: C.-T. Zheng, A. L. Goetsch, I. Tovar-Luna, R. Puchala, and T. Sahlu

Objective:

  • Determine energy requirements for mohair fiber production by Angora goats consuming different quality diets via respiration calorimetry.

Title: Caseous Lymphadenitis in Dairy Goats

Experiment Number: EL-02-10

Project Number: OKLX-SAHLU

Investigators: E. Loetz, L. J. Dawson, J. Saluki, and J. Hayes

Objective:

  • Determine predisposing factors for the prevalence of clinical manifestations of Caseous lymphadenitis and effectiveness of using vaccination to control Caseous lymphadenitis abscesses.

Title: Gastrointestinal Parasite Control by Grazing Management

Experiment Number: DM-02-11

Project Number: OKLX-SAHLU

Investigators: D. K. Miller, S. P. Hart, and B. R. Min

Objective:

  • Compare set stocked with rotationally grazed goats for differences in worm burdens as measured by egg per gram counts and by nematode counts in tracer animals.

Title: Condensed Tannins and Ruminant Methane Production

Experiment Number: RP-02-12

Project Number: OKLX-SAHLU

Investigators: R. Puchala, B. R. Min, and A. L. Goetsch

Objective:

  • Compare methane production by Angora goats consuming the condensed tannin-containing forage, Sericea lespedeza, with that by goats ingesting forage without condensed tannins via respiration calorimetry.

Title: Protein Requirements of Goats for Lactation

Experiment Number: IN-02-13

Project Number: OKLX-9803092

Investigators: I. V. Nsahlai, A. L. Goetsch, J. Luo, J. E. Moore, M. L. Galyean, C. L. Ferrell, Z. B. Owens, T. Sahlu, and F. N. Owens

Objective:

  • Develop a data set of animal performance (e.g., milk production and composition, live weight, and live weight gain) and of crude protein degradability properties and ruminal fermentable energy concentration with numerous dietary ingredients for prediction of ruminal outflow of potentially degradable dietary protein, in order to determine metabolizable protein requirements of goats for lactation.

Title: Protein Requirements of Goats for Growth

Experiment Number: IN-02-14

Project Number: OKLX-9803092

Investigators: I. V. Nsahlai, A. L. Goetsch, J. Luo, J. E. Moore, M. L. Galyean, C. L. Ferrell, Z. B. Owens, T. Sahlu, and F. N. Owens

Objective:

  • Develop a data set of animal performance (e.g., live weight and live weight gain) and of crude protein degradability properties and ruminal fermentable energy concentration with numerous dietary ingredients for prediction of ruminal outflow of potentially degradable dietary protein, in order to determine metabolizable protein requirements of goats for growth.

Title: Energy Requirements of Goats for Maintenance and Growth

Experiment Number: JL-02-15

Project Number: OKLX-9803092

Investigators: J. Luo, A. L. Goetsch, J. E. Moore, I. V. Nsahlai, M. L. Galyean, C. L. Ferrell, Z. B. Owens, T. Sahlu, and F. N. Owens

Objective:

  • Develop a data set of animal performance (e.g., live weight and live weight gain) and energy intake to determine metabolizable energy requirements for maintenance and growth of preweaning goats, growing goats of three different biotypes, and mature goats.

Title: Energy and Protein Requirements of Mohair Fiber-Producting Angora Goats

Experiment Number: JL-02-16

Project Number: OKLX-9803092

Investigators: J. Luo, A. L. Goetsch, J. E. Moore, I. V. Nsahlai, M. L. Galyean, C. L. Ferrell, Z. B. Owens, T. Sahlu, and F. N. Owens

Objective:

  • Develop a data set of animal performance (e.g., live weight, live weight gain, and mohair fiber production) and metabolizable energy and protein intakes to determine metabolizable energy and protein requirements for maintenance, growth, and mohair fiber production by Angora goats.

Title: Prediction of Feed Intake by Goats

Experiment Number: JM-02-17

Project Number: OKLX-9803092

Investigators: J. E. Moore, A. L. Goetsch, J. Luo, I.V. Nsahlai, M. L. Galyean, C. L. Ferrell, Z. B. Owens, T. Sahlu, and F. N. Owens

Objective:

  • Develop a data set of animal and dietary characteristics to develop equations for prediction of feed intake by goats.

Title: The Detection of Mastitis in Dairy Goats - On-Farm Testing (Year 2)

Experiment Number: GT-02-18

Project Number: AR01.1-110

Investigators: G. M. Tomita and S. P. Hart

Objective:

  • Determine the suitability of the appropriate mastitis detection method(s) for goats identified earlier for use as a regulatory standard to monitor milk quality and goat udder health under field conditions.

Title: Rumen-Protected Betaine and Low-Quality Forage Diets for Goats

Experiment Number: VB-02-19

Project Number: OKLX-1999-04159

Investigators: V. Banskalieva and R. Puchala

Objective:

  • Determine effects of rumen-protected betaine on blood metabolite concentrations and nutrient net flux across splanchnic tissues in meat goats consuming low-quality forage.

Title: Enhanced Goat Production Systems for the Southern United States - Phase 1

Experiment Number: MV-02-20

Project Number: 2011-52101-11430

Investigators: M. Villaquiran and T. A. Gipson

Objective:

  • Develop a vehicle to appraise use of available resources and production conditions in different goat production systems.

Title: Pathogenicity of Tapeworms

Experiment Number: DM-02-21

Project Number: OKLX-SAHLU

Investigators: D. K. Miller, S. P. Hart, T. A. Gipson, and L. J. Dawson

Objective:

  • Determine if tapeworms in goats affect growth
  • Compare effects, if existent, of tapeworms on growth with those of nematodes

Title: Anthelmintic Resistance in Goats in Oklahoma

Experiment Number: DM-02-22

Project Number: OKLX-SAHLU

Period: 2002

Investigators: D. K. Miller, T. A. Gipson, S. P. Hart, and R. C. Merkel

Objectives:

  • Survey resistance to anthelmintics on goats farms in Oklahoma
  • Determine correlations between resistance and management factors
    • Closed versus open flocks
    • Deworming programs (frequency, time, alternation of products)
  • Identify species of nematodes that are resistant and susceptible

Title: Energy Requirements for Gestation in Crossbred Boer × Spanish Does

Experiment Number: ITL-03-01

Project Number: OKLX-9803092 (00-38814-9500)

Investigators: I. Tovar-Luna, A. L. Goetsch, R. Puchala, and T. Sahlu

Objectives:

  • Determine energy requirements and efficiency of energy use for pregnancy at 80, 100, 120, and 140 days of gestation with litter sizes of 1, 2, and 3

Title: Milk Production by Boer × Spanish and Spanish Doelings With Different Numbers of Kids - Year 1

Experiment Number: RCM-03-02

Project Number: OKLX-SAHLU

Investigators: R. C. Merkel, A. L. Goetsch, T. A. Gipson, L. J. Dawson, and R. Puchala

Objectives:

  • Characterize milk production and the lactation curve of Boer × Spanish and Spanish doelings with 1 or 2 kids while on a low-moderate plane of nutrition

Title: Nutrient Requirements of Goats: Developed Equations, Other Considerations, and Future Research to Improve Them

Experiment Number: AG-03-03

Project Number: OKLX-9803092 (98-38814-6241)

Investigator: A. L. Goetsch

Objectives:

  • Present the recommended nutrient requirement expressions based on the project "Nutrient Requirements of Goats: An Update and Reevaluation
  • Suggest means of considering factors and conditions not previously thoroughly addressed in the project that can influence nutrient requirements, until more appropriate ones are available
  • Identify areas in which further research could lead to development of more accurate nutrient requirement expressions for goats

Title: Evaluation of Stocking Rate Effects with Pastures that Contain Various Forbs and Grasses being Co-Grazed by Goats and Sheep and Subsequent Performance with an Energy-Rich Diet - Second Grazing Season

Experiment Number: GA-03-04

Project Number: OKLX-0003832 (00-38814-9502)

Investigators: G. Animut, A. L. Goetsch, G. E. Aiken, K. R. Krehbiel, R. Puchala, G. Detweiler, J. O. Joseph, and T. Sahlu

Objectives:

  • Evaluate stocking rate effects on diet selection, performance, energy expenditure, grazing behavior, and body composition of goats and sheep co-grazing pastures containing various forbs and grasses and assess subsequent growth with consumption of a high concentrate diet

Title: Use of Goats for Sustainable Vegetation Management in Grazing Lands - Second Grazing Season

Experiment Number: JJ-03-05

Project Number: LS01-119

Investigators: J. O. Joseph, S. P. Hart, A. L. Goetsch, T. A. Gipson, R. C. Merkel, and G. Detweiler

Objectives:

  • General: Investigate effects of various goat management methods for vegetation rehabilitation/control in different grazing land settings in the south-central US, demonstrate and display appropriate means of vegetation management with goats, and provide education in other related goat management areas.
  • Specific: Determine effects of different goat grazing treatments on vegetation conditions and animal performance at six Oklahoma sites, in cooperation with the Caddo, Cherokee, Choctaw, Greater Seminole, Osage, and Sac and Fox Nations. Treatments include different stocking rates, rotational grazing, co-grazing with sheep or cattle, no livestock grazing, herbicides, and mowing.

Title: Energy Requirements for Milk Production by Goats at Different Stages of Lactation

Experiment Number: ITL-03-06

Project Number: OKLX0003833 (00-38814-9500)

Investigators: I. Tovar-Luna, A. L. Goetsch, R. Puchala, and T. Sahlu

Objectives:

  • Determine maintenance and lactation energy requirements for Alpine does in different stages of lactation via respiration calorimetry and heart rate

Title: Effects of the Number of Crossbred Boer Wethers Per Pen on Performance and Feeding Behavior

Experiment Number: AG-03-07

Project Number: OKLX-SAHLU

Investigators: A. L. Goetsch, G. Detweiler, T. A. Gipson, R. C. Merkel, and T. Sahlu

  • Objectives: Determine effects of the number of growing crossbred Boer wethers on performance (ADG and gain efficiency) and feeding behavior (feed intake, number of feeder visits per day, feed intake per visit, feeder occupation time per visit, feeder occupation time per day, feed consumption rate, total time feeder occupied, temporal distribution of feeding pattern) with a diet moderate in concentrate level.

Title: Feed Intake Prediction Equations for Goats

Experiment Number: AG-03-08

Project Number: OKLX-9803092 (98-38814-6241)

Investigators: A. L. Goetsch and J. Luo

Objectives:

  • Develop feed intake prediction equations for lactating, Angora, growing, and mature goats based on a compiled database of treatment mean observations from the literature

Title: Effects of Walking and Forage Consumption on Energy Expenditure by Goats

Experiment Number: BT-03-09

Project Number: OKLX0003833 (00-38814-9500)

Investigators: T. Berhan, R. Puchala, A. L. Goetsch, and R. C. Merkel

Objectives:

  • Determine effects of standing vs walking at different speeds and interactions between standing, walking, and walking speed and forage ingestion on energy expenditure, heart rate, and their ratio

Title: Effects of Feed Restriction on Heat Production by Goats

Experiment Number: ITL-03-10

Project Number: OKLX0003833 (00-38814-9500)

Investigators: I. Tovar-Luna, A. L. Goetsch, R. Puchala, and T. Sahlu

Objectives:

  • Determine how a slight feed restriction below maintenance impacts fed and fasting heat production with meat goat wethers near maturity

Title: Flushing of Meat Goats - Year 2

Experiment Number: RM-03-11

Project Number: OKLX-SAHLU

Investigators: R. C. Merkel, A. L. Goetsch, T. Berhan, L. J. Dawson, M. Looper, C. F. Rosenkrans, and T. Sahlu

Objective:

  • Determine influences of short-term supplementation of meat goat does in low or moderate/high body condition with high levels of rumen undegraded intake protein on reproductive performance.

Title: Characterization of Estrous Traits of Doelings and Does

Experiment Number: RM-03-12

Project Number: OKLX-SAHLU

Investigators: R. C. Merkel, M. Looper, C. F. Rosenkrans, and A. L. Goetsch

Objective:

  • Compare estrous activity of synchronized and unsynchronized Alpine doelings and does with an automated estrus detection system

Title: Effects of Length of Grazing on Energy Use by Growing Meat Goats

Experiment Number: BT-03-13

Project Number: OKLX0003833 (00-38814-9500)

Investigators: T. Berhan, R. Puchala, A. L. Goetsch, and R. C. Merkel

Objectives:

  • Determine effects of different lengths of grazing or pasture access (i.e., 4, 8, or 24 h) on forage intake and digestibility, grazing behavior, distance traveled, body composition, energy retention, and energy expenditure by growing Boer x Spanish wether goats

Title: Enhanced Goat Production Systems for the Southern United States - Phase 2

Experiment Number: MV-03-14

Project Number: 2011-52101-11430

Investigators: M. Villaquiran and T. A. Gipson

Objective:

  • Provide training to collaborating institutions in use of a web-based simulation program to appraise use of available resources and production conditions in different goat production systems.

Title: Web-Based Goat Nutrient Requirement Calculation System

Experiment Number: TG/AG-03-15

Project Number: OKLX-9803092 (98-38814-6241)

Investigator: T. A. Gipson and A. L. Goetsch

Objectives:

  • Develop a simple and user-friendly web-based goat nutrient requirement calculation system based on results of the project "Nutrient Requirements of Goats: An Update and Reevaluation

Title: Does Estrous Synchronization Change Breeding Activity?

Experiment Number: RM-03-16

Project Number: OKLX-SAHLU

Investigators: R. C. Merkel, M. Looper, C. F. Rosenkrans, and A. L. Goetsch

Objective:

  • Compare visual estrous detection with use of an automated estrous detection system and characterize estrous activity of Alpine does and doelings

Title: Relationships Between Body Condition Score and Body Weight in Goats

Experiment Number: MV-04-01

Project Number: 2011-52101-11430

Investigators: M. Villaquiran, T. A. Gipson, R. C. Merkel, and A. L. Goetsch

Objective:

  • Develop relationships between body condition score and body weight for different types of goats throughout the year with different planes of nutrition and stages of production

Title: Effects of Forage Level and Physical Form of the Diet and Method of Feeding on Performance and Feeding Behavior by Growing Crossbred Boer Wethers

Experiment Number: AG-04-02

Project Number: OKLX-SAHLU

Investigators: A. L. Goetsch, G. Detweiler, T. A. Gipson, R. C. Merkel, and T. Sahlu

Objectives:

  • Determine effects of dietary forage level (100 vs 50%), physical nature of the diet (pelleted vs loose), method of feeding (Calan gates vs automated feed intake recording system), and their interactions on feeding feed intake, average daily gain, and gain efficiency of growing crossbred Boer wethers.

Title: Enhanced Goat Production Systems for the Southern United States - Phase 3

Experiment Number: MV-04-03

Project Number: 2011-52101-11430

Investigators: M. Villaquiran and T. A. Gipson

Objectives:

  • Determine user-friendly means of deriving inputs for use of a web-based simulation program to appraise use of available resources and production conditions in different goat production systems

Title: Composition of Tissue Loss and Gain by Mature Meat Goats

Experiment Number: TN-04-04

Project Number: 2003-38814-13923

Investigators: T. Ngwa, A. L. Goetsch, T. Sahlu, R. C. Merkel, G. Detweiler, T. A. Gipson, and R. Puchala

Objectives:

  • Determine the composition of tissue loss by mature meat goats in high body condition when placed on a low nutritional plane
  • Determine the composition of tissue gain by mature meat goats in low body condition when placed on a high nutritional plane
  • Develop relationships between body condition score and body composition for mature meat goats
  • Develop equations to predict body composition of mature meat goats based on shrunk body weight and urea space

Title: Effects of Tethering on Forage Intake and Grazing Behavior With High Forage Quality and Availability

Experiment Number: TN-04-05

Project Number: USDA-CSREES-NRI 03-03289

Investigators: A. L. Goetsch, R. Puchala, T. Sahlu, and G. Detweiler

Objectives:

  • Investigate effects of grazing unrestrained versus tethered on grazing behavior, energy expenditure, forage intake, and composition of forage selected by meat goats on pastures with high forage quality and available mass

Title: Effects of Creep Grazing by Meat Goats of Pastures With the Tree Legume Mimosa

Experiment Number: MY-04-06

Project Number: OKLX-SAHLU

Investigators: A. L. Goetsch, R. C. Merkel, R. Puchala, and T. Sahlu

Objectives:

  • Investigate performance effects of creep grazing by meat goat kids of pastures with the tree legume mimosa compared with different stocking rates on mixed grass/forb pastures

Title: Composition of Tissue Gain by Growing Meat Goats

Experiment Number: TN-04-07

Project Number: 2003-38814-13923

Investigators: T. Ngwa, A. L. Goetsch, T. Sahlu, R. C. Merkel, G. Detweiler, T. A. Gipson, and R. Puchala

Objective:

  • Determine the composition of tissue gain by growing Boer × Spanish and Spanish meat goats at different ages and on different planes of nutrition
  • Develop relationships between body condition score and body composition for growing meat goats
  • Develop equations to predict body composition of growing meat goats based on shrunk body weight and urea space

Title: Preliminary Research on An Alternative Method of Inactivating CAEV in Colostrum

Experiment Number: KW-04-08

Project Number: OKLX-SAHLU

Investigators: K. E. Washburn, Asefa, R. N. Streeter, L. J. Dawson, J. T. Saliki, T. Lehenbauer, and A. L. Goetsch

Objectives:

  • Investigate treatment of colostrum with phenothiazine dye and light to deactivate CAEV

Title: Effects of Tethering on Forage Intake and Grazing Behavior With High Quality Forage

Experiment Number: AP-04-09

Project Number: USDA-CSREES-NRI 03-03289

Investigators: A. Patra, R. Puchala, A. L. Goetsch, T. Sahlu, and G. Detweiler

Objectives:

  • Investigate effects of grazing unrestrained versus tethered on grazing behavior, energy expenditure, forage intake, and composition of forage selected by meat goats on pastures with high quality forage

Title: Effects of Extended Storage and Season on Microbiological Quality and Composition of Goat Milk

Experiment Number: SZ-04-10

Project Number: OKLX-SAHLU

Investigators: S. Zeng, and B. Bah

Objectives:

  • Determine effects of lactation season and extended storage time on farm on composition and microbiological and sensory qualities of goat milk and to monitor the changes of pH, bacteria counts and processing characteristics of goat milk.

Title: Effects of Vacuum-Packaging and Storage Temperature on Quality and Shelf-Life of Goat Milk Soft Cheese

Experiment Number: SZ-04-11

Project Number: OKLX-SAHLU

Investigators: S. Zeng, B. Bah, R. Puchala, and K. Tesfai

Objectives:

  • Determine effects of vacuum-packaging and storage on quality and shelf-life of goat milk soft cheese and to monitor the changes of pH, bacteria counts, and sensory properties of cheese during storage

Title: Effects of Level of Feed Intake on Partitioning of Nutrients to Tissue and Mohair Fiber Growth in Growing Angora Goats

Experiment Number: RP-04-12

Project Number: OKLX-SAHLU

Investigators: R. Puchala, A. L. Goetsch, and T. Sahlu

Objectives:

  • Determine effects of different levels of feed intake on nutrient partitioning to tissue and mohair fiber gain by growing Angora goats, as well as effects on subsequent partitioning with a high nutritional plane.

Title: Use of Goats for Sustainable Vegetation Management in Grazing Lands - Third Grazing Season

Experiment Number: SH-04-13

Project Number: OKLX-SAHLU

Investigators: S. P. Hart, and A. L. Goetsch

Objectives:

  • Determine effects of different goat grazing treatments on vegetation conditions and animal performance at three Oklahoma sites, in cooperation with the Cherokee, Greater Seminole, and Osage Nations.

Title: Blood Constituents as Potential Indicators of Meat Goat Buck Test Performance

Experiment Number: AA-04-14

Project Number: OKLX-SAHLU

Investigators: A. Asmare, T. A. Gipson, C. F. Rosenkrans, A. L. Goetsch, R. C. Merkel, and D. Kiesler

Objectives:

  • Determine relationships between blood constituents (LDH isozymes, G6PDH isozymes, serum proteins, leptin, T3, T4, cortisol, IGF-1, and testosterone) determined before the meat goat buck performance test and performance during the test, in order to assess if one or a combination of such measures have potential to predict test performance.

Title: Effects of Nutritional Plane on Energy Expenditure by Meat Goats

Experiment Number: AA-04-15

Project Number: OKLX-SAHLU

Investigators: A. Asmare, R. Puchala, A. L. Goetsch, R. C. Merkel, and T. Sahlu

Objectives:

  • Determine to what degree can meat goats decrease EE to maintain body energy status, how does initial body condition of meat goats affect the ability to decrease EE and maintain body energy status, how rapidly does EE change after a decrease in ME intake to achieve constant body energy status, and how rapidly does EE increase after an increase in ME intake.

Title: Effects of Protein Deficiency on Gastrointestinal Mucosal Tissue and Responses to Nematode Infection in Goats

Experiment Number: ZW-04-17

Project Number: OKLX-SAHLU

Investigators: Z. Wang, S. Hart, L. J. Dawson, A. L. Goetsch, and T. Sahlu

Objectives:

To determine effects of varied protein intake by goats on:

  • apoptosis and proliferation of mucosal (columnar epithelial, goblet, and microfold) cells in the gastrointestinal tract;
  • infection of Haemonchus contortus in the gastrointestinal tract (worm burden and FEC);
  • immune responses, measured by ratios of mast, macrophage, eosinophil, and dendritic cells in gastrointestinal tissue, and production of antibodies against parasitic antigens.

Title: Effects of Different Stocking Rates and Creep Grazing of Mimosa on Subsequent Performance of Growing Crossbred Boer Kids

Experiment Number: AA-04-18

Project Number: OKLX-SAHLU

Investigators: A. Asmare, G. Detweiler, R. Puchala, A. L. Goetsch, T. A. Gipson, R. C. Merkel, and T. Sahlu

Objectives:

  • Determine effects of preweaning stocking rate and creep grazing of mimosa on subsequent postweaning performance of meat goat kids.

Title: Evaluation of Infusate Urea Concentration and Plasma Sampling Time to Predict Body Composition in Growing and Mature Goats

Experiment Number: AA-04-19

Project Number: OKLX-SAHLU

Investigators: A. Asmare, R. Puchala, A. L. Goetsch, T. A. Gipson, L. J. Dawson, R. C. Merkel, T. Sahlu, and G. Detweileru

Objectives:

Determine:

  • Most appropriate urea solution concentration for determining body composition of growing and mature goats
  • Appropriate time of plasma sampling
  • Effect of goat age on urea dilution
  • Importance of holding off feed and water