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Showing 1 to 20 of 48 for “"Farrowing"”.
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Farrowing Dates That Maximize Farm Profits
Made available in DSpace on 2014-12-04T21:48:21Z (GMT). No. of bitstreams: 1 6305153.pdf: 5948004 bytes, checksum: 57f9cd299bf8560ff15c70643b5214e5 (MD5) Previous issue date: 1963
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Impact of Price Risk on Aggregate Farrowing Response
The period since late 1972 has been a time of many economic changes and disruptions within the agricultural sector. These changes have led to greater variation in the prices of agricultural commodity prices, which has increased the likelihood of price risk. The impact of increasing levels of price …
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The Effects of Dry Sow Housing Conditions on Welfare at Farrowing
… the effects of confined and loose dry sow and farrowing housing systems on the welfare of the sow and her litter. Litter size decreased and piglet mortality increased greatly after the sixth parity, regardless of housing system, resulting in a sharp decline in the number of piglets weaned per …
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Sow and piglet blood glucose levels over the farrowing period and relationships with sow and litter parameters
Low blood glucose levels in sows at the start of farrowing have been associated with increased farrowing duration and higher stillbirth rates and low blood glucose levels in piglets at birth have been linked to increased pre-weaning mortality. This study used 32 sows and gilts and 443 piglets in a …
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A Comparison of Intrauterine and Cervical Artificial Insemination Rods on Farrowing Rate and Litter Size in Artificially Mated Sows
… of two artificial insemination (AI) rods on farrowing rate and number of piglets born per litter. Three hundred eighty-nine sows were allotted into two experimental groups based on parity, body condition, and breed of sire influence of the sows. One hundred ninety-three matings were performed …
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Effects of gestation length and supplemental dietary fat on colostrum and milk composition in swine
… effects of either induced premature or delayed farrowing and supplemental dietary fat on colostrum and milk composition in the sow. The induction of premature farrowing (d 112 of gestation) was shown to affect the composition of colostrum and milk, particularly by altering the fat content. The …
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INVESTIGATING PIGLET CRUSHING BY THE SOW: A DATA MINING APPROACH
Farrowing crates represent approximately 88 % of the pig farrowing systems in the U.S. (USDA`s NAHMS, 2006). This farrowing system is very advantageous for production efficiency and management; however, it presents several pig welfare issues that are subject to concern. Generally, alternatives to …
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The impact of sow gestation housing system (individual vs. group) on the reproductive performance of sows across 6 parities & the effect of farrowing pen size on pre-weaning mortality
… the effects of gestation housing system and farrowing pen size, respectively, on sow and litter performance. The gestation housing system study used a randomized complete block design to compare 2 treatments: Individual and Group (8 females/pen) housing. The experimental unit was the …
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Investigating the effects of free lactation crates on sow and piglet welfare
Farrowing crates, which are widely used in commercial pig farming, present major animal welfare problems. Sows are severely confined, being only able to stand up and lie down and not turn around for a period of five weeks around farrowing. This study compared the welfare of sows and piglets housed …
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The Effect of Exercise on Lactating Sow Performance
… and back fat (BF) of lactating sows housed in farrowing crates. A total of 24 sows were used in four trials. Body weight (BW), BF, BCS, SS, IS, and LS were recorded at placement into the farrowing barn and again at weaning. A scale of 1 (poor) to 5 (excellent) was used for BCS, SS, and IS. …
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Impedance spectroscopy for the characterization of swine reproductive states
… used to predict a sow's date of estrus, date of farrowing, and if the inseminated sow has become pregnant. The frequencies analyzed were between 1000 Hz and 29000 Hz. The models were logistic regressions which were reduced by a stepwise Akaike Information Criterion. The data set for the fertility …
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The impact of gestation sow housing system (individual vs. group) on the reproductive performance of sows & the effect of farrowing pen size on pre-weaning mortality
… females housed in groups had a lower (P < 0.05) farrowing rate (3.9 percentage units), and a higher (P < 0.05) piglet pre-weaning mortality (1.2 percentage units) and sow removal rate (5.7 percentage units) than those housed in individual stalls. This study will follow females through the 5th …
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The hog situation in Dinwiddie County
… weight when bred. Then, from breeding time until farrowing time to insure the farrowing of large, strong, vigorous litters and from farrowing time until the pigs are weaned to insure a maximum flow of milk during the important nursing period. After the pigs are weaned they should be fed a well …
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Environmental and Physiological Aspects of Prepartum Behavior in the Sow
… amounts of straw and used it to construct farrowing nests during the 24 hours preceding birth of first piglet. Most activity was directed at straw and was much the same for all sows. Manipulation of a cloth tassel by 13 prepartum sows in farrowing crates increased significantly during the …
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Evaluating new ventilation rate and evaporative cooling for modern swine production
… swine production evaluated included gestation, farrowing, nursery, growing and finishing. The ranges of ambient temperature and ambient relative humidity (RH) evaluated for minimum VR were -25 to 15°C at 10°C increment and 15% to 75% at 15% increment, respectively. Indoor set points for …
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A study of factors affecting preweaning traits in inbred and linecross swine
… litters at each of the three ages. Age of dam at farrowing was the most important single factor affecting both litter size and weight. It accounted for 70 percent of the variation in both traits at birth and about 50 percent at weaning. Sows weaned litters, which were 2.4 pigs larger and 119 …
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Characterization and Concentration of Particulate Matters Emitted From Confinement Animal Buildings
… nine different animal farms (swine finishing, farrowing, and layer hen housing). The measured bioaerosol concentrations varied from 12,000 to 28,000 CFU/m3 showing seasonal variation from each animal facility. The seasonal variation of bioaerosol concentrations was likely caused from the …
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Synchronizing Estrus and Improving Subsequent Production and Performance with Prostaglandin F2 Alpha and Pregnant Mare Serum Gonadotropin
… 103.89 vs. 108.36, respectively). As well, WEI, farrowing rate, and subsequent NBA did not differ between treat 1, treat 2, and controls (4.73 vs. 4.81 vs 4.75; 83.33 vs 80 vs 80%; 11.13 vs. 11.06 vs. 10.25, respectively). Trial 2 was performed with two experiments. The first experiment was …
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Interaction of number of boar sperm and insemination timing on fertility following induced ovulation
… h (75%) whereas AI at 26 h (86%) did not differ. Farrowing rate was affected by the number of sperm with 2.5 billion (85%) increasing farrowing (P < 0.05) compared to use of 1.5 billion (75%) and tended (P = 0.10) to be affected by AI timing. Pregnancy rate and farrowing rate were not affected by …
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