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Showing 1 to 20 of 114 for “"gilts"”.
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Strategies for improving reproductive performance in gilts
… 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 and effect of external factors such as heat …
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Estrogenic Effects of Genistein in Ovariectomized Gilts
… be estrogen sensitive. Thirty-four post-pubertal gilts were ovariectomized, and randomly assigned to one of six-treatment groups 15 days post-ovariectomy. Treatment groups received vehicle, estradiol (2 mg/day), or genistein (50, 100, 200 or 400 mg/day). Treatments were administered by …
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Pathogenesis of Swine Influenza in Pregnant Gilts
Made available in DSpace on 2014-12-11T21:33:48Z (GMT). No. of bitstreams: 1 7405716.pdf: 5654707 bytes, checksum: 06f85aa9f0e8908d5b221fbbb651c566 (MD5) Previous issue date: 1973
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Factors Influencing the Transport of Spermatozoa in Artificially Inseminated Gilts
Made available in DSpace on 2014-12-09T14:28:48Z (GMT). No. of bitstreams: 1 6507071.pdf: 2480642 bytes, checksum: eadeb31e27d61d6bb42565b3d6d98de6 (MD5) Previous issue date: 1965
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The Formation and Maintenance of Corpora Lutea in Cycling Gilts
Made available in DSpace on 2014-12-05T17:47:51Z (GMT). No. of bitstreams: 1 6305075.pdf: 2817449 bytes, checksum: 7b5b0420ba1b93949c093401468a937a (MD5) Previous issue date: 1963
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Evaluation of Transmissible Gastroenteritis and Porcine Respiratory Coronavirus Immunologic Interaction in Seronegative Pregnant Gilts
… Respiratory Coronavirus (PRCV) sensitized gilts responded to intranmuscular (IM) vaccination with Transmissible Gastroenteritis Virus (TGEV) in a similar fashion as gilts sensitized to TGEV alone. It was demonstrated that pregnant gilts sensitized to PRCV, prior to TGEV vaccination, do not …
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An Investigation of Factors Affecting the Pyridoxine Requirement of Postpubertal Gilts (Metabolism, Phosphorylase, Muscle)
Various nutritional factors were investigated with respect to their effect on the dietary B6 requirement of swine. Factors investigated included the extent and significance of B6 storage in muscle tissue, the effect of a riboflavin deficiency on B6 metabolism and thus on B6 status, and finally the …
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Effects of nursery floor space allowance on growth, physiology, and immunology of replacement gilts
… physiology, and immunology in replacement gilts. Gilts (22.3 ± 3.2 d of age and 5.6 ± 0.6 kg BW) were subjected to floor space allocations of 0.15, 0.19, or 0.27 m2/pig during a 7-wk nursery period. Floor space allocations were achieved by altering the number of pigs per pen (14, 11, and 8 …
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Effect of the timing of OvuGel administration on reproductive performance in gilts sycnhronized for estrus
… 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 results, however, there is no practical method available to determine when ovulation occurs, and, …
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Effects of fiber on the optimum threonine:lysine ratio for 25 to 50 kg growing gilts
… the ideal Thr:Lys ratio for 25 to 50 kg growing gilts and the effects of fiber on said ratio. In Exp. 1, the objectives were to determine the standardized ileal digestible (SID) Lys requirement for gilts from 25 to 50 kg BW. Seventy gilts (initial BW: 24.54 ± 3.28 kg) were used in a growth assay …
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Effect of P.G. 600 on the timing of ovulation in gilts treated with Regu-mate
… 600; Intervet America Inc., Millsboro, DE) in gilts fed a progestin (Regu-mate; Intervet America Inc.) compared with gilts receiving progestin alone. We hypothesized that P.G. 600 altered the timing of ovulation, therefore mating gilts 12 and 24 h after first detection of estrus, as is common …
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The Effects of Dietary Fructose and Fat on the Reproductive Parameters of Prepubertal and Pregnant Gilts
… and fertility. At three weeks of age, forty gilts were placed on one of five dietary treatments (n=8) containing 15% fat (FAT), 35% fructose (FRU), both fat and fructose (HFHF), or two different controls: one standard industry (IND) diet meant to result in optimal lean growth and a second …
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Impacts of microenvironment variation during breeding and gestation on the reproduction and well-being of mature gilts
… the reproductive performance and well-being of gilts housed individually in crates. In eight replicates, estrus was synchronized in mature gilts (n = 198) and after last feeding of Matrix were randomly assigned to a room temperature of 15 °C (COLD), 21°C (NEUTRAL) or 30 °C (HOT), and a light …
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An assessment of the biotin needs of developing gilts and reproducing sows in a modern production system
To assess the biotin needs of developing gilts and sows, female swine were fed corn-soybean meal diets supplemented with 0 (NB) or 220 ug (SB) d-biotin/kg diet in three growing-finishing trials and corn (C) or wheat-based (W) diets supplemented with 0 (NB) or 440 (SB) ug d-biotin/kg in a …
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Feeding strategies to enhance gilt reproduction and subsequent longevity and productivity in the breeding herd
… sow longevity and reproductive performance, gilts must be bred on second heat weighing between 135 and 160 kg. As gilts are typically fed ad libitum (AD), they often exceed targeted breeding weights, leading to structural and other problems resulting in culling at early parities. Thus, …
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Evaluation of the Hypothalamic Kisspeptin System Throughout the Estrous Cycle and During the Attainment of Puberty in Gilts
… system during the peripubertal period in gilts. In experiment 1, 40 crossbred gilts (191 d, 121 kg) were administered an intramuscular injection of PG600. Twelve days after the administration of PG600, gilts were fed 15 mg of altrenogest daily for 15 d to synchronize estrus. Following …
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Ex vivo and in vitro effects of omega-3 fatty acids on joint health in sows and gilts
… response of stimulated cartilage explants from gilts; second to characterize the effects of dietary PUFA supplementation on bone, cartilage, and synovial fluid in sows and gilts. For the first objective, cartilage was obtained from the humeral-ulnar joints of Yorkshire x Landrace market sized …
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Reproductive Performance and Nitrogen Metabolism of Gilts and Sows as Affected by Feeding Interval and Feed Consumption During Gestation
Made available in DSpace on 2014-12-13T19:42:49Z (GMT). No. of bitstreams: 1 7915399.pdf: 3355045 bytes, checksum: 2aa2284caa3629a849ba7bed576a9a9e (MD5) Previous issue date: 1979
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Growth performance and carcass characteristics of immunologically-castrated barrows in comparison to intact males, physically-castrated barrows, and gilts
… physically-castrated barrows, intact males, and gilts from wk 16 of age (67.2 ± 2.52 kg BW) to a pen mean BW of 132.5 ± 3.60 kg. The results of this study suggested that immunologically- compared to physically-castrated barrows had greater overall ADG and G:F, but similar overall ADFI. In the …
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