Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 21 of 21
Full-Text Articles in Entire DC Network
Is Physical Boar Exposure Required For Accurate Detection Of Estrus In Gilts?, Dwane Zimmerman, Denny Aherin, Jeff Hall
Is Physical Boar Exposure Required For Accurate Detection Of Estrus In Gilts?, Dwane Zimmerman, Denny Aherin, Jeff Hall
Nebraska Swine Reports
Accuracy of estrus detection in response to physical (PBE) vs fenceline (FBE) boar exposure was evaluated in 40 gilts during two successive estrous periods. Gilts heat checked with FBE expressed shorter estrous periods (.6 day) than PBE gilts. Estrus was detected within five minutes of boar exposure in 100 percent of gilts on both treatments except for PBE gilts on the first day of estrus. The first day of estrus was expressed after five minutes of boar exposure in 16.2 percent of PBE vs 0 percent of FBE gilts. The PBE gilts may be near the beginning of estrus. They …
Age And Synchrony Of First Estrus In Gilts As Influenced By Type And Duration Of Daily Boar Exposure (Be), Dwane Zimmerman, Thomas Mcgargill, Norm Rohda, Jeff Hall
Age And Synchrony Of First Estrus In Gilts As Influenced By Type And Duration Of Daily Boar Exposure (Be), Dwane Zimmerman, Thomas Mcgargill, Norm Rohda, Jeff Hall
Nebraska Swine Reports
Fence-line boar exposure (FBE) and physical boar exposure (PBE), each with durations of 10 minutes or four hours, were evaluated for their ability to trigger puberty in gilts. Gilts provided PBE attained puberty 11.8 days earlier than gilts provided FBE. Duration of boar contact was without effect. Earlier age at first estrus resulted, in large part, from a more rapid pubertal response after initiation of boar exposure (BE). The mean interval from initiation of BE to pubertal estrus was 13.5 days for PBE gilts and 24.8 days for FBE gilts. Fence-line boar exposure stimulates earlier puberty in gilts (shown in …
National Swine Improvement Federation Ultrasound Certification Workshops, Doyle Wolverton, Dennis E. Burson, Thomas Socha
National Swine Improvement Federation Ultrasound Certification Workshops, Doyle Wolverton, Dennis E. Burson, Thomas Socha
Nebraska Swine Reports
Twenty-three people participated in two National Swine Improvement Federation ultrasound certification workshops in January 1995. Each participant’s ability to predict backfat and loin muscle area on live market hogs was determined. IBP Inc,. Madison, Nebraska cooperated in the collection of carcass data for certification purposes. Nine participants were certified for backfat and loin eye readings and eight participants qualified for certification of backfat only. The workshops provided the pork industry with additional expertise in the use of ultrasonic measurements to determine backfat and loin muscle area on live swine.
Slaughter Hog Price Patterns At Omaha, Al Wellman
Slaughter Hog Price Patterns At Omaha, Al Wellman
Nebraska Swine Reports
Omaha slaughter hog prices from 1975 to 1994 were used to indicate the price patterns that tend to be repeated year to year. A monthly price index and variability of the monthly price were calculated. Strong seasonal price patterns were observed. The price patterns can be used to determine likely price trends during the year. The price data can be used to assist producers with their marketing plan and price forecasting for the future.
House Mouse Damage To Insulation, Scott E. Hygnstrom
House Mouse Damage To Insulation, Scott E. Hygnstrom
Nebraska Swine Reports
House mice (Mus musculus) were introduced into 20, 4-inch thick insulated panels and provided unlimited food and water for six months. Mouse populations increased 3-to 4-fold inside the insulated panels. Aluminum foil vapor barriers were severely damaged by mice and in all cases, reduced to less than half of their original mass. All of the insulation materials tested (insulation board, fiberglass batt, rockwool, beadboard, and vermiculite) sustained significant levels of damage as measured by increased thermal conductance. Researchers have yet to discover an insulative material that is not susceptible to house mouse damage. Producers should use construction techniques …
Impact Of Cooking Method On Quality Of Boneless Pork Loin Roasts, Fayrene Hamouz, Judith Batenhorst, Judy A. Driskell, Roger W. Mandigo
Impact Of Cooking Method On Quality Of Boneless Pork Loin Roasts, Fayrene Hamouz, Judith Batenhorst, Judy A. Driskell, Roger W. Mandigo
Nebraska Swine Reports
Chef’s Prime™ pork loin roasts were roasted, braised and cooked in a bag at an oven temperature of 325°F to an internal temperature of 160 or 180°F. Roasting improved yield and surface browning of Chef’s Prime™ roasts. While roasting and braising resulted in similar quality, the presence of moisture (braising and cook-in bag) reduced cooking time. Cooking in the bag had the greatest impact on quality characteristics as these roasts were least tender and they tended to be less juicy and favorable than braised or roasted loins. Reduction of the final internal temperature from 180 to 160°F did not improve …
Explanation Of Statistics Used In This Report
Explanation Of Statistics Used In This Report
Nebraska Swine Reports
Pigs treated alike vary in performance due to their different genetic makeup and to environmental effects we cannot completely control. When a group of pigs is randomly allotted to treatments it is nearly impossible to get an “equal” group of pigs on each treatment. The natural variability among pigs and the number of pigs per treatment determine the expected variation among treatment groups due to random sampling.
The Effects Of Tallow Addition To The Diets Of Lactating Sows On Hormone And Metabolite Concentrations, Paul Ermer, Scott Tilton, Phillip S. Miller, Austin Lewis, Cynthia Wolverton
The Effects Of Tallow Addition To The Diets Of Lactating Sows On Hormone And Metabolite Concentrations, Paul Ermer, Scott Tilton, Phillip S. Miller, Austin Lewis, Cynthia Wolverton
Nebraska Swine Reports
The metabolic responses of sows fed a corn-soybean meal or a corn-soybean meal-10% tallow diet were measured. The addition of tallow to lactating sows diets had no effect on feed or energy intake. In addition, there were no effects on the concentrations of glucose, non-esterified fatty acids (NEFA), insulin, or glucagon. No differences in either the time spent consuming feed or the number of meals consumed were observed. Finally, no linear association between eating time and area under the curve for insulin was observed for sows consuming either diet. These results show the addition of tallow to lactation diets does …
Pigchamp Summary Of 1994 Reproductive Herd Performance, Mike Brumm, Cate Dewey, Barbara B. Cox, Angela Baysinger
Pigchamp Summary Of 1994 Reproductive Herd Performance, Mike Brumm, Cate Dewey, Barbara B. Cox, Angela Baysinger
Nebraska Swine Reports
A summary of 51 swine herds in the western cornbelt that used PigCHAMP as their reproductive record system during 1994 was completed. This summary documents the wide range in performance that existed among herds. Using 10th and 90th percentiles, farrowing rate ranged from 69.1% to 88.1%, pigs weaned per litter from 8.1 to 9.8, and litters per mated female from 1.76 to 2.36. Overall reproductive performance, reported as pigs weaned per mated female per year, ranged from 14.8 to 22.4 with a 50th percentile value of 19.3. These results can be used for planning and decision making purposes in individual …
The Effects Of Dietary Protein Concentration On Performance And Visceral Organ Mass In Finishing Barrows And Gilts, Hsin-Yi Chen, Austin Lewis, Phillip S. Miller
The Effects Of Dietary Protein Concentration On Performance And Visceral Organ Mass In Finishing Barrows And Gilts, Hsin-Yi Chen, Austin Lewis, Phillip S. Miller
Nebraska Swine Reports
The response of finishing barrows and gilts to five dietary protein concentrations was evaluated. Barrows and gilts have different requirements for protein and differ in their sensitivities to excessive intakes of protein. Gilts appeared to be affected by dietary protein concentrations to a greater extent than did barrows. Significant differences in weight gain did not occur but, the lowest average daily gain was for pigs fed the two highest protein levels. Increased dietary protein concentration resulted in increased liver, kidney, and pancreas weights. These data indirectly suggest that maintenance energy requirements of barrows and gilts may be increased as dietary …
1995 Nebraska Swine Enterprise Records Program Results, Dale Kabes, Mike Brumm, Larry Bitney
1995 Nebraska Swine Enterprise Records Program Results, Dale Kabes, Mike Brumm, Larry Bitney
Nebraska Swine Reports
Data from cooperators participating in the Nebraska Swine Enterprise Records and Analysis Program were summarized for the period January to June 1995 and July 1, 1994 to June 30, 1995. Results continue to show significant variability in production and financial parameters among individual swine enterprises. The results indicate that efficient, well managed swine enterprises can be profitable and competitive in a dynamic industry.
The Effect Of Photoperiod On Sexual Development In Young Boars, Donald G. Levis, Andrew Paterson, Hugh Payne
The Effect Of Photoperiod On Sexual Development In Young Boars, Donald G. Levis, Andrew Paterson, Hugh Payne
Nebraska Swine Reports
The effects of photoperiod in stimulating reproductive function in prepubertal boars was studied in 40 crossbred boars. One group of boars was exposed to a regimen where day length was increased from 12 to 14.5 h/d (from 8 to 20 weeks of age) and then decreased from 14.5 to 12 h/d (from 20 to 32 weeks of age); whereas, the other group of boars was exposed to a regimen where day length was decreased from 12 to 9.5 h/d and then increased from 9.5 to 12 h/d. Exposing prepubertal boars to a long photoperiod inhibited the development of the testis …
Gelatinized High Added-Water Pork Skin Connective Tissue Protein Gels As Potential Water Binders, Wesley Osburn, Roger W. Mandigo
Gelatinized High Added-Water Pork Skin Connective Tissue Protein Gels As Potential Water Binders, Wesley Osburn, Roger W. Mandigo
Nebraska Swine Reports
Heating pork skin connective tissue (PCT) obtained from pork carcasses may enhance its water binding ability due to partial conversion of connective tissue collagen to gelatin. Upon cooling, the protein gel partially reforms, and may entrap added water. Incorporation of this recovered protein as a high added-water gel in reduced-fat products may improve product juiciness and palatability. The objectives of this study were to determine temperature and time variables that enhance conversion of connective tissue collagen to gelatin and determine basic properties of high added-water pork skin connective tissue gels. Heating PCT at 158oF for 30 minutes released more gel-water …
Epinephrine And Energy Mobilization By Lactating Sows, Scott Tilton, Paul Ermer, Austin Lewis, Phillip S. Miller, Cynthia Wolverton
Epinephrine And Energy Mobilization By Lactating Sows, Scott Tilton, Paul Ermer, Austin Lewis, Phillip S. Miller, Cynthia Wolverton
Nebraska Swine Reports
Research was conducted to determine the optimal dosage of epinephrine (adrenalin) for use as an in vitro diagnostic tool to measure changes in the mobilization of energy from body tissues. Doses of epinephrine were .1, .2, .4, .8, 1.2, and 1.6 &#;g/kg of body weight. Blood samples were collected from 15 minutes before epinephrine infusion through 120 minutes post infusion. Samples were analyzed for non-esterified fatty acid (NEFA) and glucose content. Linear increases in NEFA and glucose were found for increasing dosages of epinephrine, along with a quadratic effect for some of the NEFA data because of a hypersensitive response …
New Swine Nutrition Guide Available, Duane Reese
New Swine Nutrition Guide Available, Duane Reese
Nebraska Swine Reports
A new swine nutrition guide from the University of Nebraska and South Dakota State University is available for pork producers, veterinarians, and others. The guide addresses many fundamentals of swine nutrition and modern feeding program design. Single copies are available for $1 from a Cooperative Extension Office in Nebraska or by writing to Swine Nutrition, PO Box 830918, Lincoln, NE 68583- 0918. Mail orders must include 55 cents shipping and appropriate sales tax. The guide should help readers develop better feeding strategies for pigs.
Performance Of Growing-Finishing Pigs Consuming Diets Formulated On An Ideal Protein (First Four Limiting Amino Acids) Basis, Phillip S. Miller, Austin Lewis, Cynthia Wolverton, Christopher Borland
Performance Of Growing-Finishing Pigs Consuming Diets Formulated On An Ideal Protein (First Four Limiting Amino Acids) Basis, Phillip S. Miller, Austin Lewis, Cynthia Wolverton, Christopher Borland
Nebraska Swine Reports
An experiment with growing-finishing pigs was conducted to evaluate the effects of a corn-soybean meal diet supplemented with crystalline amino acids in an ideal pattern for the first four limiting amino acids (lysine, tryptophan, threonine, and methionine) on growth performance, plasma urea concentration, and carcass characteristics in barrows and gilts. Barrows were pair-fed to gilts within the same dietary treatment. For the entire growing- finishing period, there was a diet x sex interaction for daily gain and feed efficiency. Barrows and gilts consuming a corn-soybean meal diet performed similarly; however, barrows receiving diets formulated on an ideal protein basis had …
Bioavailability Of Iron In Two Different Sources For Weanling Pigs, Austin Lewis, Phillip S. Miller, Cynthia Wolverton
Bioavailability Of Iron In Two Different Sources For Weanling Pigs, Austin Lewis, Phillip S. Miller, Cynthia Wolverton
Nebraska Swine Reports
The bioavailability of the iron in iron methionine was compared with that in feed-grade ferrous sulfate. Pigs, which were anemic at weaning, were given diets containing supplements of one of the two iron sources. Iron supplementation increased weight gain and hemoglobin repletion. The increases were greater for ferrous sulfate than for iron methionine. This indicates that the iron in ferrous sulfate is more bioavailable than the iron in the iron methionine source that we investigated.
Plasma Fsh Concentration In Young Boars And Gilts From Lines That Differ In Ovulation Rate And Litter Size, Rodger K. Johnson, Joe Cassady
Plasma Fsh Concentration In Young Boars And Gilts From Lines That Differ In Ovulation Rate And Litter Size, Rodger K. Johnson, Joe Cassady
Nebraska Swine Reports
Four experiments were conducted to determine whether boars and gilts from selected lines that differ in ovulation rate and litter size also differ in plasma concentrations of Follicle Stimulating Hormone (FSH). Plasma FSH was studied because it is a potential indicator trait of ovulation rate. Plasma concentrations of FSH in young boars and gilts differed between the select and the control line. It is likely that this difference is due to a correlated response to selection for ovulation rate. Therefore, plasma concentration of FSH in young boars and gilts may be a trait that can be used effectively to indirectly …
Pathogenicity Of Intestinal Spirochetes Associated With Porcine Colonic Spirochetosis, Gerald Duhmel, Nagaraja Muniappa, Michelle R. Mathiesen
Pathogenicity Of Intestinal Spirochetes Associated With Porcine Colonic Spirochetosis, Gerald Duhmel, Nagaraja Muniappa, Michelle R. Mathiesen
Nebraska Swine Reports
We reported on a new species of intestinal spirochete bacterium, Serpulina pilosicoli/, associated with a diarrheal disease of grower-finisher swine, called porcine colonic spirochetosis (PCS). In this report we show that Serpulina pilosicoli, associated with outbreaks of PCS in the United States, attached to the cecal surface of chicks while Serpulina innocens, a non-pathogenic intestinal spirochete, did not. These findings support a role for Serpulina pilosicoli as a cause of diarrhea and reduced feed efficiency in swine.
Effect Of Floor Space Allocation On Barrow Performance To 300 Pounds, Mike Brumm, Jim Dahlquist
Effect Of Floor Space Allocation On Barrow Performance To 300 Pounds, Mike Brumm, Jim Dahlquist
Nebraska Swine Reports
One hundred eighty barrows (12/ pen) were given space allocations of 7, 9, and 11 ft2/pig from 43 to 300 lb. There was no effect of space allocation on daily feed intake, lean gain, or carcass backfat depth. Pigs given 9 ft2 grew fastest while pigs given 7 ft2 had the best feed conversion. Daily gain and feed efficiency were worst when pigs were given 11 ft2/pig. Results from this experiment will be useful to producers as they make space allocation decisions for pigs finished at weights heavier than the current U.S. average of 245 …
Porcine Reproductive And Respiratory Syndrome (Prrs), Angela Baysinger
Porcine Reproductive And Respiratory Syndrome (Prrs), Angela Baysinger
Nebraska Swine Reports
The porcine reproductive and respiratory syndrome (PRRS) virus has adverse affects on the breeding herd and growing pigs. Through field experiences and research, the clinical signs, spread, and diagnosis of PRRS are better understood. Vaccination and improved pig flow are tools available to control PRRS but, the ultimate foundation for controlling, eliminating, and avoiding the virus is better management.