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Journal of Animal Science

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https://www.readbyqxmd.com/read/27898973/placement
#1
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November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898972/intake-digestibility-performance-and-nitrogen-metabolism-of-feedlot-finished-young-bulls-fed-diets-containing-peanut-cake
#2
B R Correia, G G P de Carvalho, R L Oliveira, A J V Pires, O L Ribeiro, R R Silva, A G Leão, P A Oliveira
This aim of this study was to evaluate the use of peanut cake as a dietary substitute for soybean meal and to determine the effects on intake, apparent digestibility, performance, and N metabolism in feedlot-finished young bulls. Thirty-two young Nellore bulls with an average initial BW of 390 ± 43.5 kg were distributed in a completely randomized design and individually housed in stalls. The young bulls were fed Tifton 85 hay and 4 concentrate mixes containing 0, 33, 66, or 100% peanut cake replacing soybean meal...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898971/evaluating-the-impact-of-maternal-vitamin-d-supplementation-on-sow-performance-ii-subsequent-growth-performance-and-carcass-characteristics-of-growing-pigs
#3
J R Flohr, J C Woodworth, J R Bergstrom, M D Tokach, S S Dritz, R D Goodband, J M DeRouchey
A of subsample of 448 growing pigs (PIC 327 × 1050) weaned from 52 sows fed varying dietary vitamin D regimens were used in a split-plot design to determine the effects of maternal and nursery dietary vitamin D on growth performance. Sows were previously administered diets containing vitamin D as vitamin D (800, 2,000, or 9,600 IU/kg) or as 25(OH)D (50 µg [or 2,000 IU vitamin D equivalent]/kg from HyD; DSM Nutritional Products, Parsippany, NJ). Once weaned, pigs were allotted to pens on the basis of previous maternal vitamin D treatment, and then pens were randomly assigned to 1 of 2 nursery vitamin D dietary regimens (2,000 IU of vitamin D/kg or 50 µg 25(OH)D/kg)...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898970/the-effect-of-branding-on-consumer-palatability-ratings-of-beef-strip-loin-steaks
#4
A K Wilfong, K V McKillip, J M Gonzalez, T A Houser, J A Unruh, E A E Boyle, T G O'Quinn
The objective of this study was to determine the influence of knowing the brand or USDA grade on consumer palatability ratings of beef strip loin steaks. Strip loins were selected to represent 5 USDA grades and brands, USDA Select, Choice, Prime, Certified Angus Beef (CAB; upper 2/3 Choice), and Select, from carcasses of cattle classified as Angus on the basis of phenotype. After 21 d of aging, 2.5-cm-thick steaks were cut, consecutively cut steaks were paired for consumer evaluation. Consumer panelists ( = 112) evaluated samples for tenderness, juiciness, flavor liking, and overall liking...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898969/interpreting-statistics-from-published-research-to-answer-clinical-and-management-questions
#5
B J White, R L Larson, M E Theurer
Appropriate statistical analysis is critical in interpreting results from published literature to answer clinical and management questions. Internal validity is an assessment of whether the study design and statistical analysis are appropriate for the hypotheses and study variables while controlling for bias and confounding. External validity is an assessment of the appropriateness of extrapolation of the study results to other populations. Knowledge about whether treatment or observation groups are truly different is unknown, but studies can be broadly categorized as exploratory or discovery, based on knowledge about previous research, biology, and study design, and this categorization affects interpretation...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898968/post-artificial-insemination-supplementation-with-calcium-salts-of-soybean-oil-influences-pregnancy-establishment-factors-in-beef-cows
#6
R S Cipriano, R F Cooke, A D Rodrigues, L G T Silva, D W Bohnert, R S Marques, J L M Vasconcelos, A V Pires, R L A Cerri
The objective of this experiment was to compare hormonal, uterine, and conceptus factors associated with pregnancy establishment in beef cows supplemented or not with Ca salts of soybean oil (CSSO) for 21 d beginning after timed AI. One hundred lactating multiparous Nelore cows were allocated to 20 groups of 5 cows/group and timed inseminated on d 0 of the experiment. After AI, groups were randomly assigned to receive (as-fed basis) 100 g of protein-mineral mix + 100 g of ground corn per cow per day, in addition to 1) 100 g/cow daily of CSSO ( = 10) or 2) 100 g/cow daily of kaolin (CON; rumen-inert indigestible substance; = 10)...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898967/genomewide-association-analysis-of-growth-traits-in-charolais-beef-cattle
#7
F J Jahuey-Martínez, G M Parra-Bracamonte, A M Sifuentes-Rincón, J C Martínez-González, C Gondro, C A García-Pérez, L A López-Bustamante
The objective of this study was to perform a genomewide association study (GWAS) for growth traits in Charolais beef cattle and to identify SNP markers and genes associated with these traits. Our study included 855 animals genotyped using 76,883 SNP from the GeneSeek Genomic Profiler Bovine HD panel. The examined phenotypic data included birth, weaning, and yearling weights as well as pre- and postweaning ADG. After quality control, 68,337 SNP and 823 animals were retained in the analysis. The association analysis was performed using the principal components method via the egscore function of the GenABEL version 1...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898966/postweaning-changes-in-the-expression-of-chemerin-and-its-receptors-in-calves-are-associated-with-the-modification-of-glucose-metabolism
#8
Y Suzuki, S Haga, M Nakano, H Ishizaki, M Nakano, S Song, K Katoh, S Roh
Chemerin, originally known as a chemoattractant derived from adipose tissue and the liver, has been reported to have regulatory functions in gluconeogenesis, peripheral insulin sensitivity, and insulin secretion. This study was conducted to assess the postweaning changes in expression of this cytokine and its physiological role in the modification of glucose metabolism associated with weaning. Eighteen tissue samples were collected from Holstein calves (90 d of age; n = 4) to investigate the tissue distributions of chemerin and its receptors genes...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898965/performance-of-pigs-kept-under-different-sanitary-conditions-affected-by-protein-intake-and-amino-acid-supplementation
#9
Y van der Meer, A Lammers, A J M Jansman, M M J A Rijnen, W H Hendriks, W J J Gerrits
There is growing evidence that requirements for particular AA increase when pigs are kept under low sanitary conditions. The extent to which reduction in growth performance is related to these increased requirements is unclear. To evaluate this relationship, an experiment (2 × 2 × 2 factorial arrangement) was performed with 612 male pigs (9 per pen) kept under low sanitary conditions (LSC) or high sanitary conditions (HSC) and offered ad libitum access to either a normal CP concentration diet (NP; 17, 15, and 15% CP for the starter, grower, and finisher phase, respectively) or a low CP concentration diet (LP; 20% CP reduced relative to NP for each phase), each of which containing a basal AA profile (AA-B) or a supplemented AA profile (AA-S)...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898964/evaluating-the-impact-of-maternal-vitamin-d-supplementation-i-sow-performance-serum-vitamin-metabolites-and-neonatal-muscle-characteristics
#10
J R Flohr, J C Woodworth, J R Bergstrom, M D Tokach, S S Dritz, R D Goodband, J M DeRouchey
In Exp. 1, 56 gestating sows (PIC 1050; 35 d postinsemination) were used in a 30-d trial to determine serum 25(OH)D response to increasing concentrations of dietary vitamin D. Sows were randomly allotted to 1 of 7 dietary D treatments (200, 800, 1,600, 3,200, 6,400, 12,800, or 25,600 IU of added D per kilogram of complete diet) with 8 sows per treatment. Increasing D increased (quadratic; < 0.001) serum 25(OH)D with the response depicted by the prediction equation: serum 25(OH)D, ng/mL = 35.1746 + (0.002353 × dietary D, IU/d) - (0...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898963/justification-for-setting-the-individual-animal-genotype-call-rate-threshold-at-eighty-five-percent
#11
D C Purfield, M McClure, D P Berry
Data quality of SNP arrays impacts the accuracy and precision of downstream data analyses. One such quality control measure often imposed is a threshold on individual animal call rate. Different call rate thresholds have been applied across studies; little is known, however, about the impact of these thresholds on the quality of the genotype data. The objective of the present study was to investigate the effect of different call rate thresholds on the integrity of the genotypes but also to quantify the contribution of different factors to the variability in animal call rate...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898962/genetic-variation-and-differentiation-in-parent-descendant-cattle-and-bison-populations
#12
M A Cronin, V L R Leesburg
Genetic variation and differentiation at 32 microsatellite loci was quantified for parent-descendant cattle populations and parent-descendant bison () populations. We compared heterozygosity () and allelic richness () for 587 cattle of four breeds and three lines derived from them, and 188 bison in three pairs of parent-descendant populations. and were less in the Line 1 Hereford inbred cattle population than in the parent Hereford breed. and were intermediate in a composite population (CGC, derived from crossing Red Angus, Charolais, and Tarentaise) compared to the three parent breeds...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898961/effects-of-feeding-regimen-on-weight-gain-semen-characteristics-libido-and-lameness-in-170-to-250-kilogram-duroc-boars
#13
C Wang, J L Li, H K Wei, Y F Zhou, J J Tan, H Q Sun, S W Jiang, J Peng
A 2-period field trial was conducted to determine the effects of feeding regimen on weight gain, semen characteristics, libido, and lameness in 170- to 200-kg (period 1) and 200- to 250-kg (period 2) boars. Sixty-one Duroc boars were allotted to 1 of 3 dietary treatments and 15 g/d fish oil was also provided for each experimental boar, to maintain the n-6:n-3 intake ratio at approximately 6.1:1. The energy intakes of the 3 treatment groups were controlled by basing the feed intake on a corn-soybean meal-based diet (3...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898960/associations-among-methane-emission-traits-measured-in-the-feedlot-and-in-respiration-chambers-in-angus-cattle-bred-to-vary-in-feed-efficiency
#14
R M Herd, J I Velazco, P F Arthur, R F Hegarty
The objective of the study was to evaluate associations among animal performance and methane emission traits under feedlot conditions and in respiration chambers in Angus cattle bred to vary in residual feed intake (RFI), which is a measure of feed efficiency. Fifty-nine cattle were tested for feedlot RFI, of which 41 had methane production recorded on an ad libitum grain-based ration in the feedlot, 59 on a restricted grain-based ration in respiration chambers, and 57 on a restricted roughage ration in respiration chambers...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898959/heritabilities-and-genetic-correlations-of-pulmonary-arterial-pressure-and-performance-traits-in-angus-cattle-at-high-altitude
#15
N F Crawford, M G Thomas, T N Holt, S E Speidel, R M Enns
Pulmonary arterial pressure (PAP) is an indicator trait for pulmonary hypertension and for the risk of developing high-altitude disease (HAD) in cattle. Pulmonary arterial pressures provide a tool for selection of breeding cattle for tolerance to high altitude in mountainous regions of the United States. The objective of this study was to evaluate relationships between growth performance traits and yearling PAP (42.4 ± 9.9 mmHg; = 5,776; elevation 2,150 m) using data from 1993 to 2014 in the John E. Rouse Colorado State University Beef Improvement Center (CSU-BIC) Angus herd...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898958/technical-note-a-procedure-to-estimate-glucose-requirements-of-an-activated-immune-system-in-steers
#16
S K Kvidera, E A Horst, M Abuajamieh, E J Mayorga, M V Sanz Fernandez, L H Baumgard
: Infection and inflammation impede efficient animal productivity. The activated immune system ostensibly requires large amounts of energy and nutrients otherwise destined for synthesis of agriculturally relevant products. Accurately determining the immune system's in vivo energy needs is difficult, but a better understanding may facilitate developing nutritional strategies to maximize productivity. The study objective was to estimate immune system glucose requirements following an i...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898957/supplementation-of-corn-dried-distillers-grains-plus-solubles-to-gestating-beef-cows-fed-low-quality-forage-ii-impacts-on-uterine-blood-flow-circulating-estradiol-17%C3%AE-and-progesterone-and-hepatic-steroid-metabolizing-enzyme-activity
#17
V C Kennedy, B R Mordhorst, J J Gaspers, M L Bauer, K C Swanson, C O Lemley, K A Vonnahme
The objective of this study was to investigate the effects of supplementing dried distillers' grains plus solubles (DDGS) during late gestation on uterine blood flow (BF), circulating steroid hormones and hepatic steroid metabolizing enzymes, and calf and placental weights. Multiparous beef cows were randomly divided into a control group (CON; = 15) consuming a diet containing 90% corn stover and 10% corn silage (DM basis) for ad libitum intake and a treatment group (SUP; = 12) consuming the same diet and DDGS (0...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898956/effect-of-timing-of-challenge-following-short-term-natural-exposure-to-bovine-viral-diarrhea-virus-type-1b-on-animal-performance-and-immune-response-in-beef-steers
#18
L Carlos-Valdez, B K Wilson, L O Burciaga-Robles, D L Step, B P Holland, C J Richards, M A Montelongo, A W Confer, R W Fulton, C R Krehbiel
Bovine respiratory disease (BRD) is the most common and economically detrimental disease of beef cattle during the postweaning period, causing the majority of morbidity and mortality in feedlots. The pathogenesis of this disease often includes an initial viral infection, which can predispose cattle to a secondary bacterial infection. The objective of this experiment was to determine the effects of timing of an intratracheal (MH) challenge relative to 72 h of natural exposure to bovine viral diarrhea virus (BVDV) type 1b persistently infected (PI) calves on performance, serum antibody production, total and differential white blood cell (WBC) count, rectal temperature, clinical severity score (CS), and haptoglobin (Hp)...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898955/determination-of-the-effect-of-brand-and-product-identification-on-consumer-palatability-ratings-of-ground-beef-patties
#19
A K Wilfong, K V McKillip, J M Gonzalez, T A Houser, J A Unruh, E A E Boyle, T G O'Quinn
The objective of this study was to determine the effect of brand and product identification on consumer palatability ratings of ground beef patties. Six treatments were used in the study: 90/10 Certified Angus Beef (CAB) ground sirloin, 90/10 ground beef, 80/20 CAB ground chuck, 80/20 ground chuck, 80/20 ground beef, and 73/27 CAB ground beef. Ground beef was processed into 151.2-g patties using a patty former with 2 consecutively formed patties assigned to blind consumer testing and the following 2 assigned to informed testing...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898954/proposal-of-a-production-and-management-index-pmi-for-tilapia-farms
#20
A Muniesa, A L Rey-Castaño, I Ruiz-Zarzuela, M Guarín, C Iregui, I de Blas
Tilapia is one of the most important species in aquaculture; however, there is no available index to show the performance of a production unit. It is desirable to assess the productivity using indexes, such as the production and management index for shrimps and the European production efficacy factor for broilers. These indexes are based on data production: growth, survival, and feed conversion of a full production cycle. Taking into account these parameters, we propose a production and management index (PMI) for tilapia that is applicable for a specific period of the production cycle...
November 2016: Journal of Animal Science
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