Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 111 for “"Heifer"”.
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A hedonic model on bred heifer prices: auction, heifer, genetic, and reputation effects considered
… implicit values of characteristics of bred heifer sales to determine qualities and characteristics buyers demand. The sales data encompasses 10 years of transactions for Show-Me-Select bred heifer sales. Emphasis is on estimating implicit values of production and phenotypic factors, allowing …
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Molecular phenotypes associated with heifer fertility
… put a heavy burden on producers. Replacement heifer development is the third largest cost incurred by producers, behind feed and labor. Consequently, the failure of a heifer to conceive in her first breeding season translates directly into financial loss for the producer and lasting …
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A Five State Survey of Heifer Management Practices on Dairy Farms and Virginia Custom Dairy Heifer Growing Operations
Two surveys evaluated heifer management practices in dairy herds and custom grower operations. The NC-119 Heifer Management Survey conducted through the North Central Regional Research Project 119 included 226 Holstein and 67 Jersey herds from MN, MO, PA, VA, and WA. Mean rolling herd average for …
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Growth Factor and Extracellular Matrix Regulation of Heifer Mammary Development
… matrix proteins in regulating prepubertal heifer mammary development. In the first experiment, short-term treatment of heifers with GH or E increased proliferation of mammary epithelial cells. Coinciding with increased epithelial cell proliferation, IGF-I protein increased and IGFBP-3 …
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Development of the induced gonadotropin surge mechanism in the prepubertal heifer
… longtitudinal study was performed in prepubertal heifer calves to determine when the individual components of the hypothalamic-pituitary-ovarian axis were capable of functioning. In study 1, the hypothalamus and anterior pituitary of prepubertal dairy heifers were challenged with exogenous …
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Compatibility of biological and cultural control in dairy heifer group housing
… commercially available bedding materials in a heifer rearing facility in southern Minnesota in 2009 and 2010.
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Development of a multi-breed heifer pregnancy genetic evaluation in beef cattle
Heifer fertility represents a primary influence on the profitability of a beef cow-calf enterprise. Reproductive rates determine the number of calves born and thus influence the amount of beef product produced at the commercial level driving income for cow-calf operators. Heifer fertility then is …
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An analysis of feeder steer-heifer price differentials in the U. S
Because of a prevalent concern that feeder heifer prices are often bid below their true value, particularly in Virginia, a study was made of factors affecting price differentials between steers and heifers, and of variations in these differentials across regions and over time. The fall market sex …
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The use of carcass traits as indicators of heifer pregnancy in Angus cattle
… important measure of reproductive performance is heifer pregnancy, or the ability of heifers to conceive within the first breeding season. Heifers that fail to become pregnant in the first breeding season are often seen as an economic loss and culled from the herd. While these females may be fed …
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The Ceremony of the Red Heifer: Its Purpose and Function in Narrative Context
… investigation of the ceremony of the Red Heifer of Num 19, which describes a purificatory ritual that cleanses persons who have become defiled through contact with the dead. In seeking the authorial intent and meaning behind the elusive symbolism of the rite, two avenues are pursued: 1) an …
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The Effect of Prostaglandin Inhibitor on Pregnancy Rates of Heifer Embryo Transfer Recipients
… pregnancy rates in cows. Embryo transfer into heifers is more difficult and often requires additional manipulation of the uterus. This study was designed to determine whether administration of the prostaglandin inhibitor, flunixin meglumine, immediately prior to embryo transfer increases …
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Effects of Supplemental Fat on Beef Cow and Heifer Performance, Lactation and Reproduction
… the effects of supplemental fat on beef cow and heifer performance, lactation and reproduction. Supplemental fat sources, differing in fatty acid composition, were evaluated to determine the effects on performance, lactation and reproduction in Angus x Simmental cows (Exp. 1) or heifers (Exp. 2). …
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Phenotypic and microbial influences on dairy heifer fertility and calf gut microbial development
… of the reproductive tract would influence heifer fertility and calf gut microbial development. The objectives of this dissertation were: 1) to examine differences in phenotypes related to reproductive physiology in virgin Holstein heifers based on outcome of first insemination, 2) to …
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The influence of the level of winter nutrition on the performance of heifer calves
Digitized by Kansas State University Libraries
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The influence of the level of winter nutrition on the performance of heifer calves
Digitized by Kansas State University Libraries
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Genomics of heifer pregnancy, days open, and days to conception in Red Angus heifers
… while reducing the cost of data availability. Heifer Pregnancy (HP) - the ability for a heifer to conceive by the end of the breeding season; Days Open (DO) - days of breeding season a heifer remained open; and Days to Conception (DC) -- the number of days it took for a heifer to get pregnant, …
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Regulation of beef heifer productivity by dietary energy and prepubertal administration of bovine somatotropin
Weanling heifer calves (n = 452) grazed tall fescue pastures and were fed a high (H) or low (L) amount of corn supplement during a postweaning treatment period of 136 d. Postweaning gain of heifers receiving L and H was.43 and.62 kg/d, respectively. Heifers receiving H were heavier, and had more …
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Trace mineral supplementation in cattle: Implications in heifer development, reproductive performance, and fetal programming
… and the effects these minerals may have on heifer development, reproductive success, fetal growth, and long term productivity of beef cattle. Recently data have suggested that organic or chelated trace minerals may improve growth, reproduction, and health traits in ruminants. To evaluate the …
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Effects of Milk Replacer Composition on Measures of Mammary Development in Holstein Heifer Calves
… of GH/IGF-I axis molecules. Twenty-four newborn heifers were fed one of four MR diets: CON (20% CP, 21% fat MR fed at 441 g DM/d), HPLF (28% CP, 20% fat MR fed at 951 g DM/d), HPHF (27% CP, 28% fat MR fed at 951 g DM/d), and HPHF+ (27% CP, 28% fat MR fed at 1431 g DM/d). Animals were harvested on …
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Holstein heifer behaviors and lactating cow nutritional management for improved reproductive performance on dairy farms
… experiments were conducted involving Holstein heifers of breeding age and early postpartum Holstein cows. To investigate tail paint utilization and potential relationships among behaviors and activity, eighteen Holstein heifers were randomly assigned to one of three treatments: control (CON), …
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