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Showing 1 to 20 of 45 for “"reproductive efficiency"”.
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Strategies to Improve Reproductive Efficiency in Cattle with Dietary Intervention
This dissertation examines how reproductive efficiency can be improved through dietary intervention. The use of diet to enhance reproduction is theoretically a low-cost and low-input method that will co-align with reproductive technologies' beneficiary effects. Ideally, with improved nutrition …
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Relation of cow families to milk production, reproductive efficiency, and longevity
… analysis of the data for milk production, reproductive efficiency, and longevity was made by the method of analysis of variance. Significant differences between families were observed in Herd 4 and Herd 6 for milk production; however, when the data were classified by sire and by family, the …
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Effect of peptidoglycan-polysaccharide complex on reproductive efficiency and mastitis in sheep
Bacterial infections associated with mastitis reduce pregnancies in cattle. Effects on pregnancy and incidence of mastitis in sheep were investigated after immunization with peptidoglycan-polysaccharide (PG-PS) and killed cells from Strep. pyogenes. Rambouillet (n = 100) and mixed breed (n = 18) …
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Factors Influencing the Reproductive Efficiency of Dairy Herds in the Dominican Republic
… One obstacle to this goal is a very low reproductive rate in cows and heifers due in part to the tropical setting. Year-round heat stress may result in abnormal follicular dynamics and decreased oocyte and sperm quality causing reproductive efficiency to decline drastically. The specific …
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Strategies for Improving Reproductive Efficiency of Beef Cattle with Assisted Reproductive Technologies
Reproductive efficiency in beef cattle can be improved with reproductive technologies at the herd, individual cow, and embryonic levels. Decreasing the bull:cow ratio for natural service after fixed time artificial insemination (FTAI) can alleviate economic burden associated with FTAI. In …
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Using Commercially Available Hormones to Enhance Swine Reproductive Efficiency in Batch Management Systems
… of new gilts and sows critical to maintaining reproductive efficiency in the herd. The use of commercially available hormones to synchronize estrus in this system has not been extensively studied. This experiment was conducted to determine whether the use of commercially available hormones …
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DEVELOPMENT OF PHYSIOLOGICAL CULTURE SYSTEMS TO ACCESS UNTAPPED OVARIAN RESERVES FOR IMPROVING REPRODUCTIVE EFFICIENCY
… and qualitatively assessed the isolation efficiency of primordial, primary, and secondary follicle populations from a defined volume of the ovarian cortex, thereby providing a conservative strategy to improve assisted reproductive technologies dedicated to female fertility preservation. …
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The Effects of Low Dietary Levels on Technical Ddt on Reproductive Efficiency in Hybrid Mice
Made available in DSpace on 2014-12-12T00:36:25Z (GMT). No. of bitstreams: 1 7317292.pdf: 4029448 bytes, checksum: b18388e4f06ecf62bf3852a4e29e038f (MD5) Previous issue date: 1972
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The errors associated with estimations of the reproductive efficiency of bulls based on non-return data
… between breeds as to the effect of season on reproductive efficiency, differences between bulls within a breed, and a significant difference in seasonal effect in different stations. The use of non-return data in estimating the reproductive efficiency of a bull is of value only when all …
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A Comparison of Pregnant Mare Serum Gonadotropin and P.G. 600® to Improve Reproductive Efficiency in Sows
… effects of pregnant mare serum and P.G 600 on reproductive efficiency. Sows were randomly allotted to treatments. Sows were evaluated for age (# of parities), breed composition and body condition score. Three sows who shared all three fields in common were randomly treated with one of three …
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A comparative analysis of the reproductive efficiency of 14 Virginia market type peanut cultivars (Arachis hypogaea L.)
… is inadequate basic information available on the reproductive efficiency of peanut (Arachis hypogaea L.) cultivars and a need to determine the sources of yield improvement made in peanut over the past four decades. Therefore, a study of the reproductive efficiency (RE) of 14 virginia market-type …
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The influence of weaning age on growth and development of the baby pig and reproductive efficiency in the sow
… of the nursing period on rat of ga in and feed efficiency was observed in both experiments. Early weaning increased rate of gain in large litters and improved feed efficiency except in the 1-day treatment groups. Data on estral behavior and efficiency of reproduction were obtained from the same …
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EFFECT OF REPRODUCTIVE EFFICIENCY IN REGARDS TO WORKLOAD ON PERIPHERAL CIRCULATIONS OF BLOOD CORTISOL AND LEPTIN IN THE OPEN MARE
<p>ABSTRACT</p> <p>Effect of Reproductive Efficiency in Regards to Workload on Peripheral Circulations of Blood Cortisol and Leptin in the Open Mare</p> <p>(December, 2016)</p> <p>Michaelle Kathleen Coker, B.S., Texas A&M University</p> <p>Thesis Director: Dr. John Michael Mehaffey</p> <p>Quarter …
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Effect of Days Open on Lactation Production
… in removing variation arising between herdmates. Reproductive efficiency is of economic importance to dairymen. The necessity for regular calving is vital in an efficient dairy operation in order to maintain longevity and maximize lifetime net returns. Calving interval and days open prior to …
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Investigations of the action of vitamin A and beta carotene on reproductive performance in pigs
The reproductive efficiency of the breeding sow is a major limitation to profitability in the pork industry. Investigations on the treatment of sows with retinol proprionate or retinol palmitate and their effect on reproductive function were undertaken. The objectives of this work were to …
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Effect of exogenous gonadotropin releasing hormone on recovery from septic uterine conditions in postpartum dairy cows
… or saline (T) on d 15 postpartum, to evaluate reproductive tract involution, uterine discharge, bacterial population and inflammation, ovarian activity, reproductive efficiency and plasma progesterone, glucose, and urea. Reproductive tract involution was not affected by CG or T and was complete …
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Mathematical Modeling for Hatchability of Chicken Eggs
… during incubation, is important to evaluate reproductive efficiency in poultry. The main objective of this thesis, therefore, was to develop or improve mathematical models that describe probabilities of fertility (the complement of infertility) and embryonic mortality. Appropriate statistical …
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Methods to Synchronize Estrus, Enhance Pregnancy, and Rescue Embryos in Cattle
"Enhancing reproductive efficiency in beef and dairy herds can be accomplished through synchronization regimes. Synchronization of heifers and cows with 0, 1, 2 or 4 mg of estradiol benzoate (EB) at the onset of the CIDR/PGF 2alpha protocol resulted in a cubic effect on heifer conception rates (P < …
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Analyzing the Longevity of Sperm Within the Female Japanese Quail by Assessing Sperm Penetration of the Perivitelline Layer Under Optimal and Suboptimal Conditions.
… the ability to store semen within the female reproductive tract. The sperm storage tubules will store and subsequently release semen to travel up the oviduct. Sperm cells that make the trek up the oviduct have a chance to fertilize the ovum. These sperm cells will bind to the perivitelline …
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Maintenance of pregnancy in goats: Relationships between the fetus, the corpora lutea and the concentrations of progesterone in the maternal plasma
Reproductive efficiency in goats is limited by spontaneous pseudopregnancy and abortion. These conditions are affected by the need for the corpus luteum (CL) to maintain progesterone throughout gestation. A study was done to understand the interrelationships of the CL, maintenance of pregnancy, the …
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