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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 140 for “"Reproductive Performance"”.
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Strategies for improving reproductive performance in gilts
… pork production is largely dictated by the reproductive success of the sow. Identifying gilts with the ability to produce an optimal number of pigs over successive parities, and do so in as few days as possible is the fundamental key to improving sow lifetime productivity. Low heritability …
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Enhancing Boar Reproductive Performance for Purposes of Artificial Insemination
The objectives were to: 1) determine if im treatments of Lutalyse expedited the training of sexually inexperienced boars for semen collection and increased spermatozoal output, and 2) determine the effects of dietary L-carnitine supplementation on boar libido, semen quality, sperm production, and …
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Micro and macroclimate effects on reproductive performance of Common Eiders
… can affect several aspects of an individual’s reproductive success. On a larger scale, characteristics of the oviposition site can impact the spatial distribution of a species and consequently several aspects of population dynamics. In this thesis I investigate the importance of the thermal …
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General Reproductive Performance of Crossbred and Contemporary Purebred Dairy Cattle
Made available in DSpace on 2014-12-12T00:36:23Z (GMT). No. of bitstreams: 1 7212326.pdf: 5884481 bytes, checksum: 6fddc4dbb8964ec32f687542618be1e2 (MD5) Previous issue date: 1971
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Associations Among Beef Cattle Genotypes, Neospora Caninum Infection, and Reproductive Performance
<p>Reproductive performance is crucial for sustained financial success in the beef cattle industry. This dissertation includes a population study that quantified the incidence of Neospora caninum infections in the central region of the United States and tested its relationship with reproductive …
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Supplementation of Chromium Propionate Positively Impacts Reproductive Performance of Beef Females
… the peripartum until weaning on productive and reproductive performance in Bos taurus beef cows. In Exp. 1, 62 Angus-based beef cows were stratified by predicted calving date, body weight (BW) and randomly assigned to one of two treatments: 1) CON, (n=30) supplementation of corn gluten, soy hull …
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Reproductive performance of dorset ewes in the star accelerated lambing system
Reproductive performance of Dorset ewes in the Cornell University STAR accelerated lambing program was evaluated. This program consists of five 30-d concurrent breeding and lambing periods per year beginning on January 1 (Sl), March 15 (S2), May 27 (S3), August 8 (S4) and October 20 (S5). …
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Detection of Progesterone in Cow’s Milk for the Prediction of Reproductive Performance
Reproductive management is important for the profitability of dairy farms. The correct detection of estrus plays an important role in the success of insemination, conception and further reproductive outcomes. Conventional methods to detect estrus are often laborious or erroneous. Progesterone (P4) …
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Monitoring and improving reproductive performance of crossbred dairy cattle in Tigray Region, Ethiopia
… an extensive livestock population; however, reproductive performance of cattle and their breeding management are unsatisfactory. Currently, the sole diagnostic tool in the country is rectal palpation, which is inaccurate for early pregnancy in cattle. The study assessed reproductive …
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Reproductive Performance of the Sow: Normal Fetal Development and the Need for Certain Vitamins
Made available in DSpace on 2014-12-05T17:47:21Z (GMT). No. of bitstreams: 1 0010559.pdf: 16334603 bytes, checksum: 2be08080c9f0f8d6407707e18b429f87 (MD5) Previous issue date: 1954
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Trace mineral supplementation in cattle: Implications in heifer development, reproductive performance, and fetal programming
… with trace minerals to ensure optimal cattle performance and health. The interactions that trace minerals can have on animal production are complex and multiple factors can impact an animal’s response to mineral supplementation. The objective of this dissertation was to evaluate alternative …
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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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Improving pedigree prediction, sire, and cow evaluation by adjusting production data for past reproductive performance
… 20 dams;Adjusting pedigree information for past reproductive performance improved the regression coefficients for sires and maternal grandsires in predicting young bulls' proofs. However, the regression coefficients for dams were very small (0.02 to 0.03) with or without adjustment.</p>
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Effect of Sensory Additives on Sow Lactation Performance, Subsequent Reproductive Performance, and Nursey Pig Performance
… nutrient intake during lactation is vital to sow performance as well as litter performance. The aim of these studies was to evaluate the impact of a sensory additive on sow lactation performance and nursery pig performance. Five groups of sows were farrowed, three during winter (October, December …
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Holstein heifer behaviors and lactating cow nutritional management for improved reproductive performance on dairy farms
… industry pushes for more productive cows, the reproductive performance on farms declines. Poor reproductive management on farms can be costly due to decreased milk production in late lactation, higher feed costs from a longer calving interval, and more labor and supplies from multiple …
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Effect of the timing of OvuGel administration on reproductive performance in gilts sycnhronized for estrus
The objective of this thesis was to evaluate the effects of the time of OvuGel® administration on the timing of estrus and ovulation and fertility results in gilts synchronized for estrus by administering Matrix® for 14 d. Insemination must occur near the time of ovulation to achieve high fertility …
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