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 125 for “"Bulls"”.
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Factors Affecting Sperm Production by Dairy Bulls
Made available in DSpace on 2014-12-05T23:07:51Z (GMT). No. of bitstreams: 1 0019800.pdf: 4718592 bytes, checksum: d9b80e724deaac7a4e197a17684359b4 (MD5) Previous issue date: 1956
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Identification of seminal proteins related to fertility of bulls
… in semen that are related to fertility of bulls. The first study describes the isolation and identification of a 31,000 dalton fertility-associated antigen (FAA). FAA was found to have significant primary structure homology to a recently described novel DNase I-like protein. The …
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Nutrition and management considerations for bulls and breeding females
The development of bulls and breeding females to productive beef animals represents a substantial economic impact to the producer, and development can ultimately impact reproductive success and longevity within the herd. To maintain herd size and productivity, proper selection and retention of …
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Scrotal circumference and testicular consistency of yearling beef bulls
… (tone) of performance tested, yearling beef bulls of various breeds; (b) correlate these values with performance data; (c) attempt, by means of a buyer survey, to evaluate the fertility and overall desirability of the beef bulls sold through the Virginia BCIA Bull Test Stations; (d) study the …
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Battle of the Bulls: A Coal Conflict in Cattle Country
<p>In a community eager for economic development, one Montana ranching family struggles to cope with the onset of underground coal mining. For 40 years, the Charter family fought to prevent coal mining on their land in southern Musselshell County. In February, the federal government leased the …
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Battle of the Bulls: A Coal Conflict in Cattle Country
<p>In a community eager for economic development, one Montana ranching family struggles to cope with the onset of underground coal mining. For 40 years, the Charter family fought to prevent coal mining on their land in southern Musselshell County. In February, the federal government leased the …
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Live animal performance and carcass characteristics of bulls versus steers
… several reports have suggested that young bulls gain faster and more efficiently than comparable steers and that the bullock carcasses yield a greater percentage of retail cuts. Reports also indicated that the meat from young bulls was similar in palatability to meat from steers of similar …
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Comparison of epididymal and ejaculated sperm collected from the same Holstein bulls
… from the same four mature, fertile, Holstein bulls were collected, cryopreserved, cultured and used for in vitro fertilization. In Experiment I, epididymal sperm was found to have higher post-thaw motility compared to ejaculated sperm. During cryopreservation, the membrane permeability of …
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Influence of performance and genetic data on the sale price of seedstock bulls
… bull buyers at time of sale and prices paid for bulls sold by two large seedstock operations located in Kansas (KS Ranch) and Colorado (CO Ranch). Data were gathered from 15 sale catalogs that documented bulls sold at auctions taking place from 2009 to 2013. In total, there were 39 potential …
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Separation of abnormal spermatozoa from semen produced by bulls with impaired testicular thermoregulation
… from control and partial scrotal insulation (Pl) bulls did not differ between the pre-insult and post-insult period for any variable measured. Full scrotal insulation (Fl) bulls differed for several variables measured, but at different intervals and for different durations post-insulation. …
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Effects of Zeranol on Some Reproductive Traits in Beef Bulls (Semen, Histology, Hormones)
… of zeranol on some reproductive traits in beef bulls from 9 to 20 months of age. Three groups with 5 bulls per group were employed. Group I served as a control group. Group II was implanted with 36 mg zeranol (RALGRO) at birth, 3, and 6 months of age. Group III was implanted with 36 mg zeranol …
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Nitrogen balance and nutrient requirements of young Nellore bulls fed with static or oscillating crude protein levels, and feeding behavior, water intake and requirements of bulls with different residual feed intakes
… N balance, and requirements of young Nellore bulls, and 2) to determine feeding behavior, water intake, and requirements of high and low residual feed intake (RFI) Nellore bulls. 42 young bulls (initial BW of 260 ± 8.1 kg; age of 7 ± 1.0 mo) were fed ad libitum and were randomly assigned to …
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A Slide in Mediated Perceptions: Pit Bulls and Collateral Fallout in the Vick Trial.
… fallout for mediated subjects, and pit bulls, as a brand, have suffered from this fallout.</p>
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The Influence of Zeranol Implants in Bulls, Late Castrates and Steers Fed for Slaughter
… the effects of zeranol implants in intact males (bulls) and castrates (steers). The effects of late castration were also studied. A factorial arrangement of treatments was utilized to determine effects of castration, postweaning zeranol implantation and breed (Angus vs Limousin) on growth, …
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Effect of extra-gonadal sperm depletion on steroid hormone profiles in semen of bulls
… established for a group of four post-pubertal bulls by depleting the bulls' extra-gonadal sperm reserves (EGR) on three occasions at two week intervals. Each depletion consisted of 14 consecutive ejaculates combined into five pools to reduce variation and to provide adequate volume for steroid …
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Evaluating relationships among performance traits and body measurements in bulls from different preweaning management systems
… indicates testing programs should be evaluating bulls at a maturity endpoint rather than a constant age. Researchers have used linear body measurements to study interrela tionships among weights and other measures of growth. Their results indicate body measurements can be useful in indentifying …
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Effects of a sustained-release copper bolus on growth and reproductive traits of beef bulls
… on growth and reproductive traits of beef bulls. Two groups of bulls were used in consecutive years (n=26 in experiment 1; n=20in experiment 2). Bulls in each experiment were allotted by weight and breed into two equally numbered treatment groups (control (C); treated (T)). Bulls were …
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Accuracy of predicting genetic merit of A.I. sampled bulls for final score from pedigree information
A total of 1926 A.I. sampled Holstein bulls born from 1984 to 1988 and with first proofs from Summer 1991 to Summer 1993 were used to determine the accuracy of predicting PTAT and DTD from different sources of pedigree information obtained before the bull had daughter information. Pedigree sources …
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